VT Molded Case Circuit Breakers up to 5 A Catalog VT Molded Case Circuit Breakers up to 5 A General data / - Overview Circuit breakers Switch disconnectors / - Overview / - Selection and ordering data / - Accessories Accessories and Components Auxiliary switches Auxiliary releases /5 - Overview /5 - Selection and ordering data Manual/motorized operating mechanisms /6 - Overview /6 - Selection and ordering data Mounting accessories /8 - Overview /8 - Selection and ordering data Connecting accessories /9 - Selection and ordering data Further accessories / - Selection and ordering data Technical Information VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors / - Design / - Technical specifications / - Schematics Overcurrent releases /5 - Overview /6 - Function Accessories and Components Auxiliary switches / - Overview / - Function /5 - Technical specifications Auxiliary releases /6 - Overview /6 - Function /7 - Technical specifications Manual operating mechanisms /8 - Overview /8 - Design /9 - Function Motorized operating mechanisms / - Design / - Function Mounting accessories /6 - Overview /7 - Plug-in design /9 - Withdrawable design Project planning aids / Dimensional drawings Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A General data Overview / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors Overview The circuit breakers consist of a - or -pole switching unit and an overcurrent release which is available with a choice of different characteristics. The switch disconnector is equipped with a switch disconnector module in place of the overcurrent release. Switching units The switching unit includes: Two VT9 -TA connecting sets for connecting busbars or cable lugs VT9-8CE phase barriers A set of installation bolts (M x 5) A conductor holder The switching unit must be fitted with an overcurrent release (circuit breaker) or a VT9 5-6DT switch disconnector module (switch disconnector) In case the circuit breaker is fed from below (input terminals,, 6; output terminals,, 5), I cu does not change. For maximum circuit breaker/switch disconnector loads in accordance with the ambient temperature, see page /. Overcurrent releases ETU LP characteristic L (lines) protecting lines with low starting currents without I r regulation ETU DP characteristic D (distribution) protecting lines and transformers ETU MP characteristic M (motor) direct protection for motors and generators suitable also for protecting lines and transformers ETU MPS characteristic M (motor) with adjustable timing selectivity direct protection for motors and generators suitable also for protecting lines and transformers enables setting time delay of independent release to,, or ms ETU DPN characteristic D (distribution) with N-pole protection protecting lines and transformers in TN-C-S and TN-S network For the description of releases see page /5. Auxiliary switches and auxiliary releases As an option, the circuit breakers can be equipped with Auxiliary switches Alarm switches Shunt release for remote tripping Undervoltage release for protecting motors and other equipment against damage in case of undervoltage. Mounting In the standard fixed-mounted design, the switching units can be mounted onto support plates. As an option, the units are available in plug-in or withdrawable versions (see page /8). Connection Main circuit Is connected, using Cu or Al busbars or cables, and possibly cables with cable lugs. For further connecting options, connecting sets can be used (see page /9). Generally, conductors from the power supply are connected to input terminals,, 5, (N) and conductors from the load to terminals,, 6, (N). It is possible to reverse the current flow inside the unit (i. e. infeed from below) without reducing the rated short-circuit ultimate breaking capacity I cu. In case of infeed from below, the units must be fitted with VT9-8CE phase barriers also on the side of terminals,, 6. We recommend painting the connecting busbars. Input and output connectors/busbars must be mechanically reinforced to avoid transferring electrodynamic forces to the circuit breaker during short-circuiting. When connecting the main circuit, the dimensions of the deionization space of the circuit breaker must be observed, depending on the type of connection (see page /). Auxiliary circuits Auxiliary switches, shunt releases and undervoltage releases are connected using flexible.5... mm Cu conductors to terminals on these devices. The motorized operating mechanism and auxiliary circuits of the plug-in or withdrawable version are connected using a connector. For recommended cross-sections of cables, busbars and flexibars for fixed-mounted, plug-in and withdrawable designs, see page /. Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors Selection and ordering data Switching units Accessories Rated current I n Breaking capacity I cu DT Order no. PS* Weight per PU approx. A ka kg -pole version 5 6 B VT 75-AA6-AA unit 7. 5 65 B VT 75-AA6-AA unit 7. -pole version, unprotected N 5 6 B VT 75-AA6-AA unit 7. 5 65 B VT 75-AA6-AA unit 7. -pole version, protected N 5 6 B VT 75-AA56-AA unit 7. 5 65 B VT 75-AA56-AA unit 7. Rated current I n Current setting of the inverse- time DT Order no. PS* Weight delayed overload releases L I r per PU approx. A A kg ETU overcurrent releases System protection, ETU LP, LI function ) with fixed overload release, fixed short-circuit release 6 6 B VT9 6-6AB unit.7 B VT9-6AB unit.7 5 5 B VT9 5-6AB unit.7 System protection, ETU DP, LI function ) with adjustable thermal overload release, adjustable short-circuit release... B VT9-6AC unit.8 6 6... 6 B VT9 6-6AC unit.8 5... 5 B VT9 5-6AC unit.8 System protection, ETU DPN, LIN function ) with adjustable thermal overload release, adjustable short-circuit release... B VT9-6BC unit.7 6 6... 6 B VT9 6-6BC unit.7 5... 5 B VT9 5-6BC unit.7 Motor and generator protection, ETU MP, LI function ) with adjustable thermal overload release, adjustable short-circuit release... B VT9-6AP unit.85 6 6... 6 B VT9 6-6AP unit.8 5... 5 B VT9 5-6AP unit.85 Motor and generator protection, ETU MPS, LSI function ) with adjustable thermal overload release, adjustable short-circuit release... B VT9-6AS unit. 6 6... 6 B VT9 6-6AS unit. 5... 5 B VT9 5-6AS unit. Switch disconnector module 5 Switch disconnector ) B VT9 5-6DT unit,9 For the description of releases, see page /5. ) Only for switching units VT75-. AA6-AA or VT75-. AA6-AA ) Only for switching unit VT75-. AA56-AA / Siemens LV 6 8 * You can order this quantity or a multiple thereof.
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Auxiliary switches Auxiliary releases Overview The circuit breakers can be equipped with auxiliary switches and alarm switches. For remote switching, shunt releases can be built-in. Undervoltage releases can be used to protect motors and other equipment against damage in case of undervoltage. Selection and ordering data Rated control supply voltage U s / Frequency AC 5/6 Hz/DC Auxiliary switches and alarm switches Single NO contacts DT Order no. PS* Weight per PU approx. AC/DC 6... 5 V B VT9 -AC unit. AC/DC 5... 6 V B VT9 -AC unit. kg Single NC contacts AC/DC 6... 5 V B VT9 -AD unit. AC/DC 5... 6 V B VT9 -AD unit. Double contacts ( x NO) AC/DC 6... 5 V B VT9 -AE unit.6 AC/DC 5... 6 V B VT9 -AE unit.6 Double contacts (NO and NC) AC/DC 6... 5 V B VT9 -AF unit.5 AC/DC 5... 6 V B VT9 -AF unit.5 Double contacts ( x NC) AC/DC 6... 5 V B VT9 -AG unit. AC/DC 5... 6 V B VT9 -AG unit. Change-over contacts AC/DC 6... 5 V B VT9 -AH unit. AC/DC 5... 6 V B VT9 -AH unit. Leading contacts AC/DC 6... 5 V B VT9 -AJ unit. Shunt releases AC/DC,, 8 V B VT9 -SC unit. AC/DC V B VT9 -SD unit. AC,, 5 V/DC V B VT9 -SE unit. Undervoltage releases AC/DC,, 8 V B VT9 -UC unit. AC/DC V B VT9 -UD unit. AC,, 5 V/DC V B VT9 -UE unit. with leading contact ) AC/DC,, 8 V VT9 -UC on req. AC/DC V VT9 -UD on req. AC,, 5 V/DC V VT9 -UE on req. ) Not to be used with VT9 -M.. motorized operating mechanism. * You can order this quantity or a multiple thereof. Siemens LV 6 8 /5
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Manual/motorized operating mechanisms Overview Manual operating mechanisms The rotary operating mechanism is to be completed: For simple rotary operation of the switch unit: - VT9 -HE or VT9 -HE black knob or - VT9 -HF red knob For operating through the switchgear cabinet door: - VT9 -HJ..extension shaft - VT9 -HG/HH.. coupling driver for door-coupling operating mechanism - VT9 -HE/HF.. knob Mechanical interlocking and parallel switching Mechanical interlocks for fixed-mounted design is to be completed: - x VT9 -HA/HB.. rotary operating mechanisms - x VT9 -HE/HF.. knobs or - x VT9 -HE/HF.. knob for parallel switching Mechanical interlocking by Bowden wire is intented for fixedmounted, plug-in and withdrawable designs Selection and ordering data Manual operating mechanisms Version Color DT Order no. PS* Weight per PU approx. Rotary operating mechanisms kg locking not possible gray B VT9 -HA unit. lockable with padlock gray B VT9 -HA unit. lockable with padlock yellow label B VT9 -HB unit. Knobs for manual operating mechanism locking not possible black B VT9 -HE unit.75 lockable with padlock black B VT9 -HE unit.75 lockable with padlock red B VT9 -HF unit.75 Coupling driver for door-coupling operating mechanism To be used with the VT9 -HE or VT9 -HE black knob degree of protection IP black B VT9 -HG unit. degree of protection IP66 black B VT9 -HG unit. Is used with the VT9 -HF red knob degree of protection IP yellow B VT9 -HH unit. degree of protection IP66 yellow B VT9 -HH unit. Extension shaft, length 65 mm, may be shortened B VT9 -HJ unit.5 Extension shaft, telescopic, length 5... mm B VT9 -HJ unit.55 /6 Siemens LV 6 8 * You can order this quantity or a multiple thereof.
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Manual/motorized operating mechanisms Mechanical interlocks Version DT Order no. PS* Weight per PU approx. The mechanical interlocks have to be completed with: x VT9 -HA../HB.. rotary operating mechanisms, or x VT9 -HE../HF.. knobs Mechanical interlock for fixed-mounted design only B VT9-8LA unit.6 kg Mechanical interlock for parallel switching for fixed-mounted design only B VT9-8LB unit.6 Mechanical interlocking by Bowden wires for two VT circuit breakers B VT9-8LC unit.9 for one VT and one VT circuit breaker B VT9-8LC unit.9 Motorized operating mechanisms with storage spring Degree of protection IP, with locking device for padlocks AC/DC V B VT9 -MJ unit.59 AC/DC 8 V B VT9 -ML unit.59 AC/DC V VT9 -MF AC V/DC V B VT9 -MQ unit.56 Motorized operating mechanism with operations counter AC/DC V B VT9 -MJ unit.59 AC/DC 8 V B VT9 -ML unit.56 AC/DC V VT9 -MF AC V/DC V B VT9 -MQ unit.56 Accessories for motorized operating mechanisms Operations counter with cable, length cm B VT9 -MF unit. Extension cable for motorized operating mechanism, wires, length 6 cm B VT9 -MF unit.6 * You can order this quantity or a multiple thereof. Siemens LV 6 8 /7
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Overview Plug-in version The plug-in device includes: - complete accessories for assembling circuit breakers/ switch disconnectors in plug-in design - a set of four installation bolts (M x ) for fixing the switching unit to the plug-in device The device must be fitted with: - -pole version: VT 75-.AA6-AA switching unit - -pole version: VT 75-.AA6-AA or VT 75-.AA56-AA switching unit For connecting the plug-in device with busbars or cable lugs, the VT9 -TA connecting sets can be used that are included in the scope of supply of the -pole VT 75-.AA6- AA or -pole VT 75-.AA6-AA switching unit. For connecting in another way, other connecting sets are available. Selection and ordering data Withdrawable version The withdrawable device includes complete accessories for assembling circuit breakers/switch disconnectors in withdrawable design. The circuit breaker inside the withdrawable device can be moved between an operating position and a checking position (withdrawn). The device must be fitted with - -pole version: VT 75-.AA6-AA switching unit or - -pole version: VT 75-.AA6-AA or VT 75-.AA56-AA switching unit Plug-in devices Version DT Order no. PS* Weight per PU approx. -pole version B VT9 -PA unit.766 -pole version B VT9 -PA unit. kg Withdrawable devices -pole version B VT9 -WA unit.97 -pole version B VT9 -WA unit. /8 Siemens LV 6 8 * You can order this quantity or a multiple thereof.
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Connecting accessories Selection and ordering data Version Conductor cross-section S Type of connection mm Terminals for fixed-mounted circuit breakers Connecting sets for -pole version Box terminals 6... 5 Cu cables, flexibars DT Order no. PS* Weight per PU approx. B VT9 -TC unit. kg Terminals for circular conductors 5... 5 Cu/Al cables B VT9 5-TD unit. 5... Cu/Al cables B VT9 -TD unit.9 Terminals for circular conductors for enhancing termination point protection to IP use the VT9-8CB terminal cover x 5... 5 Cu/Al cables B VT9 5-TF unit.5 x 5... Cu/Al cables B VT9 -TF unit.6 Terminals for circular conductors, for 6 cables 6 x 6... 5 Cu/Al cables B VT9 -TF unit. Terminals for rear connection Terminals for front connection Included in every supply of switching units Isolating terminals,5...,5;... 6 Cu/Al busbars cable lugs Cu/Al busbars, cable lugs, flexibars Cu flexible conductors B VT9 -RC unit.7 B VT9 -TA unit. B VT9 -TN unit.7 Front connection bars for increased pole spacing -- Cu/Al busbars cable lugs, flexibars B VT9 -ED. for increased pole spacing -- Cu/Al busbars cable lugs, flexibars B VT9 -EE.7 Single terminals for - or -pole version Box terminal 6... 5 Cu cables, flexibars B VT9 -TC unit. Terminals for circular conductors 5... 5 Cu/Al cables B VT9 5-TD unit.8 5... Cu/Al cables B VT9 -TD unit.8 x 5... 5 Cu/Al cables B VT9 5-TF unit.68 x 5... Cu/Al cables B VT9 -TF unit.68 Terminals for circular conductors, for 6 cables 6 x 6... 5 Cu/Al cables B VT9 -TF unit. Terminals for rear connection Cu/Al busbars cable lugs B VT9 -RC unit. * You can order this quantity or a multiple thereof. Siemens LV 6 8 /9
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Further accessories Selection and ordering data Version DT Order no. PS* Weight per PU approx. Phase barriers Included in the scope of supply of the switching unit; in case the circuit breaker/switch disconnector is fed-in from below (power supply connected to terminals,, 6), it is necessary in most cases to install these barriers also on the bottom side set of two pieces, for -pole version B VT9-8CE unit.77 one piece, additionally for -pole version B VT9-8CE unit.5 kg Terminal cover, degree of protection IP Increases degree of protection of the connection point to IP when using VT9 -TD, VT9 5-TF, VT9 -TF or VT9 -TF block type terminals, intended for fixed-mounted, plug-in and withdrawable versions. -pole version B VT9-8CB unit.98 -pole version B VT9-8CB unit. Locking device for knob B VT9 -HL unit. Enables locking the circuit breaker in switched off manually position. For locking the device, you can use up to three padlocks with a shank diameter of max. 6 mm Bolt sealing inset B VT9-8BN unit. Provides sealing for: overcurrent release accessory compartment cover terminal cover manual operating mechanism motorized operating mechanism Additional cover for overcurrent release B VT9-8BL unit.8 Provides protection for overcurrent releases Connecting cable B VT9 -PL unit. For connecting the circuit breaker/switch disconector accessories in withdrawable design (can also be used for plug-in and fixed-mounted design) Position signaling switch B VT9 -WL unit. For indicating the position of the circuit breaker in the plug-in or withdrawable device Coding set VT9 -WN unit. Prevents inserting the wrong switching unit into the plug-in or withdrawable devices Pushbutton cover B VT9 -MF unit.5 For motorized operating mechanism; the cover may be provided with lead seals / Siemens LV 6 8 * You can order this quantity or a multiple thereof.
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors Design Installation and connection Main circuit Is connected, using Cu or Al busbars or cables, and possibly cables with cable lugs For further connecting options, connecting sets are produced (see page /9). Generally, conductors from the power supply are connected to input terminals,, 5 and conductors from the load to terminals,, 6. But it is possible to exchange this connection (exchanging input and output terminals without limiting rated short-circuit ultimate breaking capacity I cu ) In case of feed-in from below, the circuit breakers/switch disconnectors must be fitted with VT9-8CE phase barriers also on the side of terminals,, 6 We recommend painting the connecting busbars with different colors Input and output connectors/busbars must be mechanically reinforced in order to avoid transferring electrodynamic forces to the circuit breaker during short circuiting The way of connecting the power circuit must observe the deionization space of the circuit breaker/switch disconnector (see page /). Auxiliary circuits Switches, shunt releases or undervoltage releases are connected using flexible.5... mm Cu conductors to terminals on these devices Motorized operating mechanism and auxiliary circuits of the plug-in or withdrawable design are connected using a connector. Conductor cross-sections of main terminals Recommended cross-sections of cables, busbars and flexibars for fixed-mounted, plug-in and withdrawable designs Rated current I n Permissible cross-section S Busbars W x H Cu Al Cu Al A mm mm mm mm 6 5 6 6 6 5 8 5 5 5 5 x 5 x 5 5 7 5 x 5 x 6 7 95 5 x 5 x 95 5 x 5 x 5 5 5 5 x 5 5 x 6 Maximum circuit breaker/switch disconnector loads in accordance with the ambient temperature VT circuit breaker/switch disconnector connection to pole by x mm Cu cable 5 C 55 C 6 C 65 C 7 C 5 A 5 A 5 A 5 A 5 A Order No. Rated current I n Maximum permissible conductor cross-section Cable type Sector-shaped conductor, stranded Sector-shaped conductor, solid Round conductor, stranded Round conductor, solid Busbars and cable lugs Technical information W x H A mm mm mm mm mm Page VT9 -TA 5 5 x... VT9 -RC 5 5 x... /5, /55 VT9 5-TF VT9 -TC 5 6... 5 Cu...5 Cu 6... 5...5 Cu VT9 -TC VT9 5-TD 5 5... 5 Cu/Al 6...5 Cu/Al 5... 5 Cu/Al 6... 5 Cu/Al VT9 5-TD VT9 -TD 5 5... Cu/Al... Cu/Al 5... Cu/Al... Cu/Al /, /55 VT9 -TD VT9 5-TF 5 x (5... 5) Cu/Al x (6... 5) Cu/Al x (5... 5) Cu/Al x (6... 5) Cu/Al /, /55 VT9 5-TF VT9 -TF 5 x (5... ) Cu/Al x (... ) Cu/Al x (5... ) Cu/Al x (... ) Cu/Al /, /56 VT9 -TF VT9 -TF 5 6 x (6... 5) Cu/Al 6 x (6... 5) Cu/Al 6 x (6... 5) Cu/Al 6 x (6... 5) Cu/Al /5, /56 VT9 -TF VT9 -ED 5 /6 VT9 -EE 5 /6 VT9 -TN /6,5...,5... 6 Cu flexible conductor Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors Technical specifications Specifications Circuit breakers Switch disconnectors Standards EN 697-, IEC 697- EN 697-, IEC 697- Approval marks Number of poles, Rated current I n A, 6,, 5 -- Rated uninterrupted current I u A 5 Rated operational current I e A -- 5 Rated operational voltage U e V AC max. 69 AC max. 69 DC max. Rated frequency f n Hz 5/6 Rated impulse withstand voltage U imp kv 8 Rated insulation voltage U i V 69 Utilization category (selectivity) AC 69 V A -- Utilization category (switching mode) AC 69 V -- AC- B DC V -- DC- B Rated short-time withstand current U e = AC 69 V I cw /t,5 ka/ s ka/5 s Series U e VT N VT H U e -- Rated ultimate short-circuit breaking capacity (rms value) ) I cu Rated short-circuit service breaking capacity (rms value) I cs /U e 6 ka 6 ka 6 ka ka ka 8kA 8kA 5kA ka 65 ka 5 ka ka 5 ka 6 ka ka 8 ka AC V AC 5 V AC 5 V AC 69 V AC V AC 5 V AC 5 V AC 69 V Rated short-circuit making capacity (peak value) I cm /U e 75 ka ka AC 5 V ka/ac 5 V ka/ac V Off-time at I cu ms -- Losses per pole at I n = 5 A W 8 Mechanical endurance cycles Electrical endurance (U e = AC 5 V ) cycles Switching frequency cycles /hr Operating force N 8 Front-side device protection IP Terminal protection IP Operating conditions Reference ambient temperature C Ambient temperature range C -... +55 Working environment Pollution degree Max. elevation m dry and tropical climate Seismic resistance Hz g (8... 5) Design modifications Front/rear connection / Plug-in design Withdrawable design Accessories Switches auxiliary/relative/signal/leading Shunt release/with signal switch Undervoltage release/with leading switch/with signal switch Front manual operating mechanism/lateral operating mechanism at the right/left hand side Mechanical interlocking of manual operating mechanisms, by Bowden wire Motorized operating mechanism/with operations counter Locking-type knob Bolt sealing inset/additional cover for overcurrent release /+ /+ / / / / / / / / -- -- available -- unavailable + in preparation / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors Schematics Circuit breakers with accessories -pole version Recommended wiring of the control circuits L+ B Q Motor drive S Auxiliary trips/early contact Plug-in device/withdrawable device 5 -WA SO -PA Main circuit X 9 7 5 A VT9 -U. B VT9 -S. A.Y VT9 -U..Y.Y VT9 -AJ VT9..-6.. I> I> 5 A NC C NO S5 or or or M P U< U U< V Q T T T B MP X 8 PE 6 N X YC Ext.oper. counter J A B A.Y cavity no..y.y 6 -WA SO SO -PA 6 Plug-in device/withdrawable device NSO_89 A B... VT9 -AC. X signal or 5 6 7 8 9 5.. VT9 -AD or. X VT9 -AH acc. c. no...... VT9 -AC. Connecting cable relative VT9 -AD. Switches ) Only for -pole version of VT 75-.AA6-AA switching unit.. VT9 -AH. auxiliary... VT9 -AC. VT9 -AD... VT9 -AH VT9 -AG.. auxiliary.. VT9 -AF or or or or or or or.. 5 6 7 8 9 5.. VT9 -AE.. acc. c. no. acc. c. no. acc. c. no. + Connecting cable NSO_9 MP M P X X S5 YC B, S Q J Q VT -M.. motorized operating mechanism motor storage device connector to connect control circuits connector for external operations counter switch to signal AUTO (NO-C) / MANUAL (NC-C) modes VT9 -MF external operations counter recommended wiring of the control circuits (not included in the scope of supply of the operating mechanism) pushbutton switch for energy storage (switched on = automatic storage, switch may be continuously switched on) motorized operating mechanism circuit breaker VT 75-.AA6-AA switching unit main contacts T, T, T, T ) current transformers V trip-free mechanism ETU LP/DP/MP/MPS VT9 -PA VT9 -WA circuit breaker - overcurrent release / switch disconnector - VT9 5-6DT switch disconnector module pushbutton to test release plug-in device withdrawable device X, X VT9 -PL connecting cable SO, SO, SO VT9 -. VT9-5. VT9 -. VT9 -AJ contacts signaling position of circuit breaker/switch disconnector in plug-in or VT9 -WL withdrawable device undervoltage release shunt release undervoltage release with leading contact leading contact Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Circuit breakers Switch disconnectors -pole version Recommended wiring of the control circuits L+ B Q S Plug-in device/withdrawable device 5 -WA SO -PA N Motor drive Auxiliary trips/early contact Main circuit X NC 9 7 NO S5 C MP 5 A VT9 -U. B VT9 -S. A.Y VT9 -U..Y or or or M P U< U U<.Y VT9 -AJ V VT9..-6.. I> I> Q T 5 7 T T T A B X 8 PE 6 N X YC Ext.oper. counter J A B A.Y cavity no..y.y 6 8 -WA SO SO -PA 6 N Plug-in device/withdrawable device NSO_9 Connecting cable 5 6 7 8 9 5 X Switches signal relative auxiliary auxiliary auxiliary auxiliary auxiliary A B... VT9 -AC or... VT9 -AD or. VT9 -AH..... VT9 -AC. VT9 -AD. VT9 -AH..... VT9 -AC. VT9 -AD. VT9 -AH.. VT9 -AG.... VT9 -AF.... VT9 -AE....... VT9 -AC. VT9 -AD VT9 -AH. 5. 5. 5. 5. 5. VT9 -AC 5. VT9 -AD 5. VT9 -AH 6. 6. 6. 6. 6. or or or or or or or or or or or or or acc.c. no. acc. c. no. acc. c. no. acc.c. no. + acc. c. no. acc. c. no. 5 acc. c. no. 6 VT9 -AC 6. VT9 -AD 6. VT9 -AH NSO_9 X 5 6 7 8 9 5 Connecting cable / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Overview The electronic overcurrent release consists of a separate and interchangeable unit, which is supplied with the VT switching unit. By exchanging the overcurrent release, the range of the rated current of the circuit breaker can be easily changed. Overcurrent releases for VT switching units are produced with current values of I n =, 6 and 5 A. The ETU LP are produced with rated currents of 6, and 5 A. The releases (including regulation of -6%) cover a current range from to 5 A. Tripping characteristics Depending upon the needs for adjusting the tripping characteristic to the protected device and to the variability of the characteristic with regard to selectivity, the following releases are available: ETU LP t L I ETU MP t NSO_5 I They have more kinds of characteristics with adjustable I r, t r and I i. ETU MPS I r L t r I i L S I I 5 ms ms t I r t r NSO_5 They have one type of characteristic and fixed-set I r and I i settings. ETU DP t I r L I I NSO_ They have more kinds of characteristics with adjustable I r, t r, I i and t v. ETU LP, DP, MPand MPs overcurrent releases are intended for -pole VT 75-.AA6-AA switching units and -pole VT 75-.AA6-AA switching units with disconnecting of the N pole. ETU DPN I sd t sd I I i L I NSO_56 They have one type of characteristic with adjustable I r and I i. I t I N I r t r I i NSO_5 They are intended for -pole VT 75-AA56-AA switching units with protected N pole. They have more characteristics with adjustable I r, t r, I i and I N. I Siemens LV 6 8 /5
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Function ETU LP, DP, MP and MPS- description of function Proper functioning of releases does not depend on the form of current in the main circuit. The function of the release is supported by a microprocessor, which processes a sampled signal of the power circuit and recalculates it to obtain an rms value. Therefore, the releases are suitable for protecting circuits where the sinusoidal current is distorted by high harmonics (e.g. circuits with controlled rectifiers, power factor compensators, pulse loading, and the like). All the releases protect a circuit against short-circuiting and overloading. The tripping characteristics are independent of the ambient temperature. The release is fixed to the switching unit by two bolts. The transparent cover over the adjustment controls can be sealed. Setting the tripping characteristic The tripping characteristic of the overcurrent releases is defined by standard EN 697-. For releases ETU DP, MP, MPS and DPN, the characteristic is adjusted using latched switches on the overcurrent release. A visual demonstration on setting the tripping characteristic can be found in the SIMARIS design program. L is a zone of low overcurrents and includes the area of thermal protection. S is a zone of medium overcurrents and includes long-distance short-circuit protection for lines. Intentional delay in tripping of these low short-circuit currents can be used to achieve selectivity of protective devices. For MPS releases, the delay can be set at,, or ms. I is a zone of high overcurrents and includes protection against ultimate short-circuit currents. For MP releases, the time delay can be set at or 5 ms.. Dependent release (thermal) L The dependent release ETU DP is adjusted using one I r switch. The I r switch is used to adjust the rated current of the circuit breaker, with the characteristic shifting on the current axis. By means of its internal circuitry, the release is set to one type of characteristic. The dependent releases ETU MP, MPS and DPN are adjusted using two switches, I r and t r. The first (I r ) switch is used to adjust the circuit breaker s rated current. The characteristic is moved on the current axis. By turning the other switch (t r ), the time is adjusted after which the circuit breaker will trip while passing through 7. I r. The tripping characteristic thus moves on the time axis. Using the t r switch, it is possible to set a total of 8 characteristics. For ETU MP and MPS releases there are characteristics for motor protection and characteristics for protecting lines available. Breaking times correspond with the release classes,,. By changing t r, it is possible to select the characteristic according to the required motor starting (light, medium, heavy or very heavy starting). For ETU DPN releases, there are available 8 characteristics for protecting lines or transformers. It is not possible to turn the device back on right after the dependent release has been actuated and circuit breaker tripped. The release must be allowed to cool off, because it has a thermal memory. The memory can be disabled by turning the switch from the normal T t position to the T position. The dependent release remains active, and only its thermal memory is inactivated. Switching off the thermal memory should be used only in well-justified cases, and with the knowledge that there could be rising temperature in the protected device with repeated tripping.. Delayed independent release S This release type is only in the ETU MPS overcurrent releases. The delayed independent release has the function of a delayed short-circuit release. It is used to set up a selective cascade of circuit breakers. It is set up using parameters I sd and t v. I sd is an n-multiple of current I r (I sd = n I r ). It is a short-circuit current that, within the span of I i to I i, will trip the circuit breaker with delay t v, where t v is a delay set up for switching off the release. The delayed independent release actuates the circuit breaker if the current in the circuit reaches at least the preset n-multiple and lasts at least the preset delay time t v.. Independent instantaneous release (short-circuit release) I For releases ETU DP, MP and DPN, the independent instantaneous release is adjusted using one I rm switch. The I rm switch is used for setting up the short-circuit current that, upon being reached or exceeded, causes instantaneous tripping of the circuit breaker. /6 Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Tripping characteristics of ETU LP, DP, MP, MPS and DPN releases with load The tripping characteristic from the cold state indicates the tripping times during which it is assumed that, up to the moment when an overcurrent develops, no current is flowing through the circuit breaker. The tripping characteristic tripped from warm state indicates the tripping times during which it is assumed that, before the moment when an overcurrent develops, current is flowing through the circuit breaker. Characteristics of electronic releases are independent of the ambient temperature and are plotted in a cold state. Digital releases enable simulation of a release in warm state. The tripping times become shorter in a steady state, as shown in the following diagram. The steady state is a period during which the characteristic does not change. If the circuit breaker is loaded with a reduced current for at least minutes, the tripping times will be cut by a half. If the load is less than 7% of I r, the tripping time does not become shorter. k [-]..8.6.. Decrease of tripping time with load T - When tripping from the warm state, the tripping time of the characteristic is cut short during the standstill time t u by coefficient k. Thermal standstill time of the characteristics For all overcurrent releases, the thermal standstill time is t u min. During this time, the tripping time t v is cut short from the cold-state characteristic by the coefficient k. The real tripping time is t s = k x t v Example The shortening constant can be read from the graph. With steady current 85% of I r the real tripping time will be hortened to: t s =.7 x t v k [ ] time shortening coefficient I r [A] adjusted rated current of the overcurrent release t v [s] tripping time of the release derived from the characteristic t s [s] real tripping time of the release tripped from warm state t u [s] standstill period for particular characteristics Overcurrent releases are preset by the manufacturer I r = min Restart = T (t) I i = min, ms t r = TV, t (t), min I sd = ms, min I N =.5 I r. 5 6 7 8 9 I r [%] NSO_7 T Overcurrent releases ETU LP - Lines Protecting lines with low starting currents The VT9..-6AB release is intended only for VT75 -.AA6-AA or VT75 -.AA6-AA switching unit. The release has a thermal memory that cannot be disabled. The rated currents of the releases are given by their type designations and correspond to a standardized series of currents (see specifications table). The short-circuit release is fixed-set at I n. One of the advantages of the releases is its simplicity, because it does not require any adjustment. Therefore, it is intended for less complicated applications. Specifications Order No. Rated current I n Overload protection I r A A VT9 6-6AB 6 6 VT9-6AB 8 VT9 5-6AB 5 Tripping characteristics 5 t [s] 5 5 5.5...5...5 I r L I n = 6 A I n = A I n = 5 A I i I NSO_8 5 5 x I n Siemens LV 6 8 /7
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Overcurrent releases ETU DP - Distribution Protecting lines and transformers The VT9..-6AC release is intended only for VT75-.AA6-AA or VT75-.AA6-AA switching units. Operation of the release is controlled by a microprocessor. The release is equipped with a thermal memory that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling the thermal memory, the thermal release remains active. The operational state 7% of I r is signalled by an LED indicator that flashes green in a.5 s interval. As the load grows, the blinking frequency of the diode increases. In case of a load larger than % of I r, this LED will turn red and will begin to blink red just before tripping. On the lower part of the release cover are two photocells for communicating with the prospective signaling unit. The releases have tripping characteristics especially designed for practical purposes that provide for optimal exploitation of transformers up to.5 I r. The releases offer simple adjustment of the tripping characteristics. Set-up includes only the rated current and the short-circuit tripping level at I r or 8 I r. Tripping characteristics 5 t [s] 5 5 5.5...5....5.. min. L I n = A I n = 6 A I n = 5 A I n = A I n = 6 A..5 I n = 5 A.....5 I r max. x x x x 8x x 8x x 8x x 8x 8x 8x NSO_9 5 5 x I n I i I i I i I r I I i Adjustable specifications Order No. Rated current I n A Overload Restart Instantaneous protection I r short circuit protection I i A 6 8 5 55 58 VT9-6AC 6 T () x l r 6 T (t) 8 x l r 69 7 76 8 87 9 6 69 7 8 87 9 VT9 6-6AC 6 T () x l r 5 T (t) 8 x l r 5 7 5 6 5 5 7 6 VT9 5-6AC 5 7 T () x l r 8 T (t) 8 x l r 9 5 /8 Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Overcurrent releases ETU MP - Motors Direct protection for motors and generators Possibility for protecting lines and transformers The VT9..-6AP release is intended only for VT75-.AA6- AA or VT75-.AA6-AA switching units. The operation of the release is controlled by a microprocessor. The release is equipped with a thermal memory that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling of the thermal memory, the thermal release remains active. When one or two phases fail (due to current greater than I r in the remaining phases), in the M-characteristic mode, the switch will open with a s delay (so called undercurrent release). Another parameter for adjusting the release consists of the rated current and short-circuit tripping level. The time delay of the short-circuit release can be set to or 5 ms. The operational state 7% of I r is signalled by an LED indicator that flashes green in a.5 s interval. As the load grows, the blinking frequency of the diode increases. In case of a load larger than % of I r, this LED will turn red and will begin to blink red just before tripping. On the lower part of the release cover are two photocells for communicating with the prospective signaling unit. The releases have tripping characteristics especially designed for practical purposes that provide for optimal exploitation of transformers up to.5 I r. A total of 8 characteristics can be set on the release. Mode M provides characteristics suitable for protecting motors and in mode TV are characteristics for protecting transformers and lines. The shape of each characteristic can be changed using a selector switch. Adjustable specifications Order No. Rated Overload t r (7, x I r ) Restart Instantaneous current I n protection short circuit protection I i I r A A s ka ms (TV ) T (),5 (TV ) T (,5 6 (TV ) T (, 8 (TV ) T (),6 5 (M ) T (,8 55 5 (M 5) T (), 58 8 (M 8) T (,5 VT9-6AP 6 (M ) T (,5 6 (M ) T (t),5 69 8 (M 8) T (t),5 7 5 (M 5) T (t), 76 (M ) T (t),8 5 8 (TV ) T (t),6 87 (TV ) T (t), 9 (TV ) T (t),5 (TV ) T (t),5 6 (TV ) T (), 69 (TV ) T (, 7 (TV ) T (,6 8 (TV ) T (), 87 (M ) T (, 9 5 (M 5) T (),6 8 (M 8) T (, VT9 6-6AP 6 (M ) T (), 5 (M ) T (t), 8 (M 8) T (t), 5 5 (M 5) T (t),6 (M ) T (t), 7 (TV ) T (t), 5 (TV ) T (t),6 5 (TV ) T (t), 6 (TV ) T (t), (TV ) T (),5 (TV ) T (,5 5 (TV ) T (,75 5 (TV ) T (), 7 (M ) T (,5 5 (M 5) T (),5 6 8 (M 8) T (, VT9 5-6AP 5 7 (M ) T (),5 8 (M ) T (t), 9 8 (M 8) T (t), 5 (M 5) T (t),5 (M ) T (t),5 (TV ) T (t), 5 (TV ) T (t),75 (TV ) T (t),5 5 (TV ) T (t),5 Siemens LV 6 8 /9
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Tripping characteristics 5 t [s] 5 5 min. L I r max. I r t r ms 5 ms I i t r TV 5 t [s] 5 5 L min. I r max. I r t r ms 5 ms I i t r NSO_ M 5.5...5....5.. I n = A I n = 6 A I n = 5 A I n = A I n = 6 A..5 I n = 5 A.....5.5. 5 5 5.5.5.5...6.5.6.8..5....6..5.75..5..5 5 5 x I n I I i [ka] I i [ka] I i [ka] 5.5...5....5.. I n = A I n = 6 A I n = 5 A I n = A I n = 6 A..5 I n = 5 A.....5.5. 5 5 5.5.5.5. 5 8..6 5 8.5.6.8..5....6..5.75..5..5 5 5 x I n I I i [ka] I i [ka] I i [ka] / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Overcurrent releases ETU MPS - Motors with setting timing selectivity Direct protection for motors and generators Possibility for protecting lines and transformers Enables adjusting time delay of independent release The VT9..-6AS release is intended for VT75-.AA6- AA or VT75-.AA6-AA switching units. The operation of the release is controlled by a microprocessor. The release is equipped with a thermal memory that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling of the thermal memory, the thermal release remains active. When one or two phases fail (due to current greater than I r in the remaining phases), in the M-characteristic mode, the switch will open with a s delay (so called undercurrent release). Another parameter for adjusting the release is the rated current and tripping level of the delayed short-circuit release. The time delay (t sd ) can be set on the delayed short-circuit release at,, or ms. The operational state 7% of I r is signalled by an LED indicator that flashes green in a.5 s interval. As the load grows, the blinking frequency of the diode increases. In case of a load larger than % of I r, this LED will turn red and will begin to blink red just before tripping. On the lower part of the release cover are two photocells for communicating with the prospective signaling unit. The releases have tripping characteristics especially designed for practical purposes that provide for optimal exploitation of transformers up to.5 I r. A total of 8 characteristics can be set on the release. Mode M provides characteristics suitable for protecting motors, and in mode TV are characteristics for protecting transformers and lines. The shape of each characteristic can be changed using a selector switch. Adjustable specifications Order No. Rated Overload t sd (7. x I r ) Restart Short circuit current I n protection I r protection (short time delayed) I i A A S ka ms (TV ) T () (TV ) T () 5 6 (TV ) T () 7 8 (TV ) T () 9 5 (M ) T () 55 5 (M 5) T () 5 58 8 (M 8) T () 7 VT9-6AS 6 (M ) T () 9 6 (M ) T (t) 69 8 (M 8) T (t) 5 7 5 (M 5) T (t) 7 76 (M ) T (t) 9 8 (TV ) T (t) 87 (TV ) T (t) 5 9 (TV ) T (t) 7 (TV ) T (t) 9 6 (TV ) T () 69 (TV ) T () 5 7 (TV ) T () 7 8 (TV ) T () 9 87 (M ) T () 9 5 (M 5) T () 5 8 (M 8) T () 7 VT96-6AS 6 (M ) T () 9 5 (M ) T (t) 8 (M 8) T (t) 5 5 5 (M 5) T (t) 7 (M ) T (t) 9 7 (TV ) T (t) (TV ) T (t) 5 5 (TV ) T (t) 7 6 (TV ) T (t) 9 (TV ) T () (TV ) T () 5 5 (TV ) T ( 7 5 (TV ) T ()) 9 7 (M ) T () 5 (M 5) T () 5 6 8 (M 8) T () 7 VT95-6AS 5 7 (M ) T () 9 8 (M ) T (t) 9 8 (M 8) T (t) 5 5 (M 5) T (t) 7 (M ) T (t) 9 (TV ) T (t) (TV ) T (t) 5 (TV ) T (t) 7 5 (TV ) T (t) 9 Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Tripping characteristics 5 t [s] 5 5 5.5...5 I n = A I n = 6 A I n = 5 A min. L S.....5 I r L t v [ms] max. x Ir 5 x Ir 7 x Ir I r t r I sd t v 9 x Ir I I r t r I sd t v NSO_ TV I sd 5 5 x I n I n In = 5 A In = 6 A t r [s] In = A I 5 t [s] 5 5 5.5...5.. min. n 5 8 I n = A I n = 6 A I n = 5 A L S I r t v [ms] max. x Ir 5 x Ir NSO_...5 5 5 x I n I r t r I sd t v I n 7 x Ir I sd 9 x Ir I r t r I sd t v 5 8 In = 5 A In = 6 A t r [s] In = A I M / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Overcurrent releases Overcurrent releases ETU DPN - Distribution with protected N pole Protecting lines and transformers in TN-C-S and TN-S networks The VT9..-6BC release is intended only for the VT 75-.AA56-AA switching unit. The operation of the release is controlled by a microprocessor. The release is equipped with a thermal memory that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling of the thermal memory, the thermal release remains active. The rated current I r, delay for switching off the release at 7. I r, and the tripping level of the short-circuit release can be adjusted. The operational state is signalled by an LED indicator that flashes green in a.5 s interval. As the load grows, the blinking frequency of the diode increases. In case of a load larger than % of I r, this LED will turn red and will begin to blink red just before tripping. On the lower part of the release cover are two photocells for communicating with the prospective signaling unit. The current of the fourth pole (N pole) is adjusted using the IN switch as a multiple of the I r current. Measuring of current on the fourth pole can be disabled by turning the button to the position. Tripping characteristics 5 t [s] 5 5 5.5...5 I N N I N =.5 x Ir L.75 x Ir I n = A I n = 6 A I n = 5 A x Ir I r min. max. x Ir NSO_.....5 5 5 x I n I N I r t r I n I i x Ir 7 x Ir I N 9 x Ir I r I I i t r [S] t r I i Adjustable specifications Order No. Rated Overload t R (7, x I r ) Restart Instantaneous current I n protection short circuit protection I i I r A A S ka ms T () T () 5 6 T () 7 8 T () 9 5 T () 55 T () 5 58 T () 7 VT9-6BC 6 T ( 9 6 T (t) 69 T (t) 5 7 T (t) 7 76 T (t) 9 8 T (t) 87 T (t) 5 9 T (t) 7 T (t) 9 6 T () 69 T () 5 7 T () 7 8 T () 9 87 T () 9 T () 5 T () 7 VT9 6-6BC 6 T () 9 5 T (t) T (t) 5 5 T (t) 7 T (t) 9 7 T (t) T (t) 5 5 T (t) 7 6 T (t) 9 T () T () 5 5 T () 7 5 T () 9 7 T () T () 5 6 T () 7 VT9 5-6BC 5 7 T () 9 8 T (t) 9 T (t) 5 T (t) 7 T (t) 9 T (t) T (t) 5 T (t) 7 5 T (t) 9 Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Auxiliary switches Overview Type designation according to contact arrangement Arrangement of contacts Order No. Number of contacts Contact types VT9 -AC () make VT9 -AG () make VT9 -AD () break VT9 -AE () break VT9 -AF () + break + make VT9 -AH () changeover Location of accessory compartments in VT Functions and names of switches according to their location in accessory compartments Accessory compartment Switch name Signaling Relative (,5,6) ) Auxiliary Leading ) Accessory compartments, 5, 6 for -pole version only. Signaling switch: The switch is located in accessory compartment. Its function is to signal the state of the circuit breaker. Relative switch: The switch is located in accessory compartment. This switch indicates the tripping of the circuit breaker by releases, the pushbutton or the pushbutton on the motorized operating mechanism. Auxiliary switch: in compartement, an auxiliary switch is located. Its function is to indicate the switching position of the main contacts (in the -pole version, auxiliary switches can also be installed in accessory compartments,5 and 6). The leading switches are intended for the make/break function in advance of the main contacts. Function States of auxiliary switches in the switching unit accessory compartments Circuit breaker state Accessory compartment (... 6) ) and and and Toggle positon of circuit breaker State of the main contacts VT9 -AC VT9 -AD VT9 -AC VT9 -AD VT9 -AC VT9 -AD VT9 -AJ VT9 -U. VT9 -AG VT9 -AF VT9 -AE VT9 -AH VT9 -AH VT9 -AH Switched on Switched off manually or electrically by operating mechanism Switched off by overcurrent release Switched off by auxiliary release or by button or the trip pushbutton on the motorized operating mechanism = contact open, = contact closed ) Accessory compartment, 5, 6 are only for -pole version. Location of switches in accessory compartments, see page /57. / Siemens LV 6 8
State of switches in the switching unit accessory compartments VT Molded Case Circuit Breakers up to 5 A Accessories and Components Auxiliary switches early contact signalling relative auxiliary.y.y.y.y VT9 -AJ acc. c. no.... VT9 -AC or... VT9 -AD or. VT9 -AH..... VT9 -AC or. VT9 -AD or. VT9 -AH..... VT9 -AC or. VT9 -AD or. VT9 -AH Switches.. VT9 -AG.. auxiliary.. VT9 -AF or or or.... VT9 -AE....... auxiliary VT9 -AC. VT9 -AD. VT9 -AH 5. 5. 5. 5. 5. auxiliary VT9 -AC 5. VT9 -AD 5. VT9 -AH 6. 6. 6. 6. acc. c. no. acc. c. no. acc. c. no. acc. c. no. + acc. c. no. acc. c. no. 5 acc. c. no. 6 or or or or 6. auxiliary VT9 -AC or 6. VT9 -AD or 6. VT9 -AH NSO_ Technical specifications General data Order No. VT9 -A. VT9 -A. ) VT9 -AJ VT9 -AH VT9 -AH ) Rated operational voltage U e V AC 6... 5 DC 6... 5 AC 5... 6 DC 5... 6 AC 5 AC...5 DC...5 AC 5..6 DC 5...6 Rated isolation voltage U i V 5 5 Rated frequency f n Hz 5/6 Rated operational current I e /U e AC- --.....5A/5 V -- -- -- AC-5 6 A/ V, A/ V,.....5A/5 V A/AC 5 V.5 A/AC 5 V -- A/5 V DC- -- -- -- --. A/DC 6 V DC-. A/ V,. A/ V,. A/5 V...../6 V --. A/DC 5 V -- Thermal current I th A,5 -- 6.5 Arrangement of contacts,,,,,, Connector cross-section S mm.5... Terminal protection (connected switch) IP ) VT9 -A. is not suitable to control electromagnetic loads Siemens LV 6 8 /5
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Auxiliary releases Overview Type designation of shunt releases according to the rated operating voltage Order No. VT9 -SC VT9 -SD VT9 -SE Type designation of undervoltage releases according to the rated operating voltage U e AC/DC,, 8 V AC/DC V AC,, 5 V/DC V Order No. VT9 -UC VT9 -UD VT9 -UE Rated operating voltage U e AC/DC,, 8 V AC/DC V AC,, 5/DC V Location of accsessory compartments in VT The particular rated operating voltage of the shunt release is set up by jumpers located on the right hand side in the release. It is always set to the maximum value by default. Function Shunt releases Circuit breaker switched off by the shunt release Signaling switch: The switch is located in accessory compartment. Its function is to signal the state of the circuit breaker. Relative switch: The switch is located in accessory compartment. This switch indicates the tripping of the circuit breaker by releases, the pushbutton or the pushbutton on the motorized operating mechanism. Auxiliary switch: in compartement, an auxiliary switch is located. Its function is to indicate the switching position of the main contacts (in the -pole version, auxiliary switches can also be installed in accessory compartments,5 and 6). The leading switches are intended for the make/break function in advance of the main contacts. Circuit breaker states and toggle positions of the circuit breaker 6 5.... Main contacts Auxiliary switch Auxiliary switch Relative switch accessory compartment NSO_6 Circuit breaker state Switched on Switched off by releases, or by button or by the trip pushbutton on the motorized operating mechanism Switched off manually or electrically by the operating mechanism L+ L+ Toggle positions of circuit breaker.... Relative switch t [ms] accessory compartment A VT9 -O. A A.Y U< or U< A.Y VT9 -S. NSO_ N- N- /6 Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Auxiliary releases Undervoltage releases Circuit breaker switched off by the undervoltage release Circuit breaker states and toggle positions of the circuit breaker 6 5........ Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch Early switch accessory compartment accessory compartment NSO_ Circuit breaker state Switched on Switched off by releases, or by button or by the trip pushbutton on the motorized operating mechanism Switched off manually or electrically by operating mechanism Toggle positions of circuit breakers Number and type of contacts by arrangement of contacts Arrangement of contacts Number of contacts Contct types break + break + make make L+ L+.Y.Y.Y.Y.Y.Y.Y.Y Early switch t [ms] accessory compartment A VT9 -O. A A.Y U< or U< A.Y VT9 -S. NSO_ N- N- Technical specifications Shunt releases Undervoltage releases Order No. VT9 -S. Rated operating voltage U e V AC,, 8,,,, 5 DC,, 8,, Rated frequency f n Input power at. U e Functional description Time to switch-off ms Loading time 5/6 Hz AC < VA DC < W Connection cross-section S mm.5... Terminal protection (connected release) Location in accessory compartment No. U,7U e the circuit breaker must trip IP Order No. VT9 -U. VT9 -U. ) Rated operating voltage U e V AC,, 8,,,, 5 DC,, 8,, Rated frequency f n Hz 5/6 Input power at. U e Functional description ) Time to switch off ms Loading time AC < VA DC < W Connector cross-section S mm.5... Terminal protection (connected release) Location in accessory compartment No. Leading switch U.85 U e (circuit breaker is possible switch on) U.5 U e (the circuit breaker must trip) ) Tripping of the undervoltage release can be delayed using the VT9 - UX delay unit, for more detailed information, see page P. ) Cannot be used in combination with VT9-M.. motorized operating mechanism. IP Rated operating voltage U e V -- AC 5 Rated frequency f n Hz -- 5/6 Rated operating current I e /U e V -- AC A/59 Arrangement of contacts --,, Connector cross-section S mm --.5... Terminal protection (connected release) -- IP Siemens LV 6 8 /7
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Manual operating mechanisms Overview Rotary operating mechanisms The following elements of the rotary operating mechanisms need to be used: for controled use of the switch unit with: - VT9 -HE or VT9 -HE black knob - VT9 -HF red knob for controlling through the switchgear cabinet door with: - VT9 -HJ..extension shaft - VT9 -HG/HH.. coupling driver for door-coupling operating mechanism - VT9 -HE/HF.. knob Mechanical interlocks and mechanical interlocks for parallel switching Mechanical interlocks for fixed-mounted versions are to be completed by: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob Mechanical interlocking with Bowden wire is intented for fixedmounted, plug-in and withdrawable designs Mechanical interlocking is to be completed with: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob Design The rotary operating mechanism makes possible to govern the circuit breaker by pivoting knob, e.g. to switch machines on and off. Modular conception of operating mechanisms makes possible simple mounting on the switching unit (also additionally) after the accessory compartment cover is removed. A fixed motor is possible to seal. The operating mechanism and its accessories is ordered separately according to your choice (see page /6). Features The rotary operating mechanism makes possible to control the circuit breaker: a) from the front panel of the circuit breaker (Fig.) VT9 -HA/HB.. rotary operating mechanism + VT9 -HE/HF.. knob b) through the switchgear door (Fig. ) VT9 -HA/HB.. rotary operating mechanism + VT9 -HJ.. extension shaft + VT9 -HE/HF.. knob + VT9 -HG/HH.. coupling driver for door-coupling operating mechanism The rotary operating mechanism is fixed right on the switching unit of the circuit breaker The coupling driver is fixed onto the switchgear door and it provides degree of protection IP or IP66 The knob is placed on the rotary operating mechanism or on the coupling driver The extension shaft is supplied in two options, standard (length 65 mm - can be cut short) and telescopic (adjustable length 5... mm). Enhanced safety for operator: The rotary operating mechanism and knob are also supplied with the possibility to lock the circuit breaker in position switched off manually. The unit and knob of the rotary operating mechanism can be locked using three padlocks with shank diameter max.... 6 mm Each coupling driver for door-coupling operating mechanism prevents the door from opening when the circuit breaker is onstate or off-state by releases and types VT9-HG and VT9-HG when the circuit breaker is in the state switched off manually and rotary operating mechanism knob is locked up Two circuit breakers with rotary operating mechanisms can be provided with mechanical interlock or with parallel mechanical switching (see page /6). Order No. Description Colour Locking while the circuit breaker is in state Degree of protection Switchgear door locking in the circuit breaker state switched on or off by release switched off manually and locked VT9 -HA Rotary operating mechanism grey no -- -- -- -- VT9 -HA Rotary operating mechanism grey yes -- -- -- -- VT9 -HB Rotary operating mechanism yellow yes -- -- -- -- VT9 -HE Knob black no -- -- -- -- VT9 -HE Knob black yes -- -- -- -- VT9 -HF Knob red yes -- -- -- -- VT9 -HG Coupling driver black -- IP yes yes -- VT9 -HG Coupling driver yellow -- IP yes yes -- VT9 -HH Coupling driver black -- IP66 yes no -- VT9 -HH Coupling driver yellow -- IP66 yes no -- VT9 -HJ Extension shaft -- -- -- -- -- 65 (can be short) VT9 -HJ Extension shaft, telescopic -- -- -- -- -- 5... Length mm /8 Siemens LV 6 8
RP-BD-CK PS PS PS SP SV RP-BD-CK PS PS PS SP SV RP-BD-CK VT Molded Case Circuit Breakers up to 5 A Accessories and Components Manual operating mechanisms Function VT9-8LA Mechanical interlocking VT9-8LB Mechanical parallel switching Provides mechanical interlocking of two circuit breakers/switch disconnectors so that they cannot both be tripped simultaneously, but only one of them at the same time. Both circuit breakers may be turned off simultaneously. Interlocking can be used between two VT circuit breakers or between one VT and one VT circuit breaker. Both circuit breakers must be furnished with a rotary operating mechanism (at least one with a rotary operating mechanism and knob). In order to use the interlocking, it is absolutely necessary to comply with the dimensions shown in the figure and table. Provides for simultaneous switching of two circuit breakers/ switch disconnectors. Parallel switching can be used between two VT circuit breakers or between VT and VT circuit breakers. Each circuit breaker must be equipped with a rotary operating mechanism and at least one with a knob. In order to use parallel switching, it is absolutely necessary to comply with the dimensions shown in the figure and table. 5 L PS PS PS X X NSO_ NSO_ Left switching unit Right switching unit VT -pole VT -pole VT -pole VT -pole X L X L X L X L mm mm mm mm mm mm mm mm VT P 5 5.5.5 8.5 8 85.5 VT P 5 5.5.5 8.5 8 85.5 VT P.5 8.5 57.5 5.5 5.5 85 89 VT P.5 8.5 57.5 5.5 5.5 85 89 Left switching unit Right switching unit VT -pole VT -pole VT -pole VT -pole ) X L X L X L X L mm mm mm mm mm mm mm mm VT P 5 +7 +7 +7 5.5 +7.5 +7 8.5 +7 x x VT P 5 +7 +7 +7 5.5 +7.5 +7 8.5 +7 x x VT P.5 +7 8.5 +7 57.5 +7 5.5 +7 +7 5.5 +7 x x VT P.5 +7 8.5 +7 57.5 +7 5.5 +7 +7 5.5 +7 x x ) Switching unit VT P (-pole version) can only be on the right side. NSO_5 Siemens LV 6 8 /9
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Manual operating mechanisms VT9-8LC. Mechanical interlocking Circuit breaker installation in switchgear and controlgear assemblies Detailed information can be found in the instructions for use, which you may download from our website www.siemens.com/technical assistance Provides mechanical interlocking of two circuit breakers/ switch disconnectors so that they cannot both be tripped simultaneously, but only one of them at a time. Both circuit breakers may be turned off simultaneously. The VT9-8LC mechanical interlocking is intended for two VT circuit breakers. VT9-8LC Interlocking is intended for one VT circuit breaker and one VT. Circuit breakers can be delivered in fixed-mounted, plug-in and withdrawable designs. Order No. of mechanical interlocking VT9-8LC Circuit breaker types VT VT VT9-8LC NSO_6 min R = 5 9... 7 min. 8 / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Motorized operating mechanism Design The motorized operating mechanism is part of circuit breaker accessories enabling you to switch the circuit breaker on and off remotely. Modular design of the operating mechanisms enables simple mounting on the circuit breaker (also additionally) after the circuit breaker accessory compartment cover is removed. The fixed operating mechanism can be sealed. VT circuit breakers with motorized operating mechanisms can be used in the most demanding industrial applications such as protection of standby sources, synchronization of two sources, etc. and for all applications for which it is necessary to ensure automated and unmanned operation of electrical equipment. The motorized operating mechanisms are equipped with spring storage mechanisms and due to accumulated energy to trip the circuit breaker, it is no problem to trip the circuit breakers within times up to 5 ms. Releasing of the storage unit and tripping of the circuit breaker is ensured by a closing coil that belongs to standard equipment of every motorized operating mechanism. The time before the circuit breaker is tripped using the operating mechanism is 8 ms. This method of tripping is suitable for controlling technological entities. When faster circuit breaker tripping is required (e.g. emergency STOP button), it is possible to use the motorized operating mechanism in combination with undervoltage release or shunt release. On the front panel of the motorized operating mechanism, there is a selector switch to select the drive modes with a possibility to indicate remotely the selector switching position. The first mode is automatic remote control (selector switch in AUTO position). This is the standard position in automatic operation. The second mode is manual control (selector switch in MANUAL position), the motorized operating mechanism does not need any voltage to perform its function. Remote switching on and off in position AUTO is carried out using pushbuttons that must be connected to the operating mechanism connector. Furthermore, this position makes it is possible to control the circuit breaker with the pushbuttons on the operating mechanism front panel. In MANUAL mode it is possible to switch on and off using the green and red pushbuttons on the front panel of the motorized operating mechanism cover. The function of the remote control button in MANUAL mode is locked up, whereas the function of the remote control button remains active for safety reasons. The motorized operating mechanism, apart from the circuit breaker, recognizes only two fixed positions. In the first position, the circuit breaker is. When the circuit breaker is tripped in AUTO mode by overcurrent releases or auxiliary trips. Then, because of the mechanical link between the circuit breaker and the operating mechanism, a pulse will be generated to wind up the spring of the storage unit automatically. The operating mechanism can be wound up automatically, depending on the demand by the operator, by permanent closing of switch S or after the circuit breaker is checked by switching S switch on. In the second fixed position the circuit breaker is switched off and the loaded operating mechanism is ready to switch the breaker on after it has received the setting pulse. The motorized operating mechanism makes it possible to control the circuit breaker after the loss of control voltage. In MAN- UAL and AUTO modes, it is possible to wind up the storage unit by repeated rotation of the foldable handle. After the storage unit is wound up, it is possible to switch the circuit breaker on and off using the control buttons on the front panel of the operating mechanism. On the front panel, there is a storage unit status indicator indicating locally what state the operating mechanism storage is in and whether it is possible to switch the circuit breaker on. VT motorized operating mechanisms enable to obtain a storage status signal from the terminal strip also remotely. VT operating mechanisms have optional designs, alternatively with MANUAL/AUTO indication. The operating mechanism can be furnished with an electromechanical operations counter that may be installed in the operating mechanism cover or fixed beyond the circuit breaker space (e.g. in the switchgear cabinet door) or in the switchgear space using a metal holder included in the supply of external operations counter and its connecting can be done using connectors. The operating mechanism can be locked in off position using as many as three padlocks with shank diameter of maximum. mm. An VT9 -MF cover can be fitted to the turn-on switch of the operating mechanism and then sealed. The cover prevents turning on the circuit breaker from the operating mechanism panel. The VT9 -MF extension cable has a connector on one side that connects to the connector on the motorized operating mechanism and conductors on the other side that connect, for example, to a terminal block. Order No. VT9 -M.. Operational voltage U e V AC, 8,,,, 5 DC, 8,, Rated frequency f n Hz 5/6 Control pulse length for storing ms... ) Control pulse length ms... 7 ),... ) Time before switching on ms < 5 Time before switching off ms 8 Frequency of cycles / Frequency of cycles - instant successive / cycles Mechanical endurance Input power Protection AC DC contact making/hr contact making ) For sequence of control pulses, see page... contact making VA W AC, 8, V; AC V LSN C/; LSN C/ DC, 8, V; DC V LSN-DC C/; LSN-DC C/ Rated operating current V AC 5 A/5 AUTO/MANUAL switches I e /U e DC.5A/5 Order No. Number of conductors Conductor cross sections S mm.5 Conductor lengths cm 6 VT9 -MF Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Motorized operating mechanism Function Circuit breaker switched on/off by the motorized operating mechanism Circuit breaker switched on by the motorized operating mechanism electrically by pushbutton Circuit breaker switched off by the motorized operating mechanism electrically by pushbutton 6 5 Main contacts 5 Auxiliary switch NSO_8 6 5 Main contacts Auxiliary switch 8 NSO_9........ 5 Auxiliary switch Relative switch Relative switch Early switch accessory compartment accessory compartment........ Auxiliary switch Relative switch Relative switch Early switch 8 8 accessory compartment accessory compartment.y.y.y.y.y.y.y.y Early switch t [ms] accessory compartment.y.y.y.y.y.y.y.y Early switch 9 9 t [ms] accessory compartment Wiring diagram Circuit breaker switch on and switched off by motorized operating mechanism, electrically by pushbutton and pushbutton L + Recommended wiring of the control circuits Q Circuit breaker states and toggle positions of the circuit breaker Circuit breaker state Switched on Switched off by releases, or by button or by the trip pushbutton on the motorized operating mechanism Switched off manually or electrically by the operating mechanism Toggle positions of circuit breaker OF F B S Wiring diagram description Motor drive 9 7 X NC NO S5 C MP M P 5 Symbol MP M P X X S5 YC B S Q Description VT9 -M.. motorized operating mechanism motor storage mechanism connector to connect control circuits connector for external operations counter switch indicating AUTO/MANUAL modes external VT9-MF operations counter recommended wiring of the control circuits (not included in operating mechanism order) make pushbutton break pushbutton switch for energy storage (switched on = automatic storage, may be continuously switched on) motorized operating mechanism circuit breaker X 8 6 X PE N - Ext. oper. counter / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Motorized operating mechanism Tripping of the circuit breaker with motorized operating mechanism by the overcurrent release (switch S in switched-on state automatic storage) 6 5............ Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch Early switch Early switch 5 5 5 5 t [ms] accessory compartment accessory compartment accessory compartment Tripping of the circuit breaker with motorized operating mechanism by a shunt release or undercurrent release (switch S in switched-on state automatic storage) 6 5........ Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch 5 5 t [ms] accessory compartment accessory compartment NSO_ NSO_ Circuit breaker switched on by the motorized operating mechanism (electrical pushbutton ) and switched off by the shunt release Recommended wiring of the control circuits L+ B Q X 9 7 NC MP X C Motor drive NO S5 8 PE N- 6 S 5 A X J acc. c. no. YC N- A Circuit breaker switched on by the motorized operating mechanism (electrical pushbutton ) and switched off by the undervoltage release Recommended wiring of the control circuits L+ B Q X 9 7 NC Motor drive NO S5 C VT9 -O. B or M P U< U Ext. oper. counter S 5 A VT9 -U. B B VT9 -S. VT9 -S. or M P U< U NSO_ MP X 8 PE N- 6 X YC Ext.oper. counter A J N- B NSO_ acc. c. no. Siemens LV 6 8 /
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Motorized operating mechanism Recommended actuating pulses Circuit breaker switched on/off by the motorized operating mechanism S switch permanently closed (automatic storage) or open HK PS 8 8 > IMP > 6 > 7 IMP t [ms] Circuit breaker switched off by the overcurrent or auxiliary releases and switched on by the motorized operating mechanism S switch permanently closed (automatic storage) HK 5 5 NSO_5 Description of charts Symbol HK PS RS R IMP S IMP IMP X Circuit breaker states and toggle positions of the circuit breakers Circuit breaker state Switched on Description main contacts auxiliary switch relative switch circuit breaker closing instant by release pulse to store up motorized operating mechanism energy (generated by S switch) make pulse for motorized operating mechanism break pulse for motorized operating mechanism random segment of time Switched off by releases, or by button or by the trip pushbutton on the motorized operating mechanism Switched off manually or electrically by the operating mechanism Toggle positions of circuit breakers RS 5 R > > 88 7 IMP t [ms] NSO_6 Circuit breaker switched off by the overcurrent or auxiliary releases and switched on by the motorized operating mechanism S switch closed only for storing up 5 HK RS X + 5 > 88 X > IMP S R > 7 IMP t [ms] NSO_7 / Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Motorized operating mechanism Use of VT9 -M.. motorized operating mechanism in the automatic standby system Wiring diagram of the motorized operating mechanism of the circuit breaker Recommended control pulses for switching of the VT circuit breakers by the motorized operating mechanism after their switching off by a shunt release or undervoltage release in the automatic standby system Control circuit Q L+ S B Motor drive X 9 7 5 NC NO S5 C A VT9 -U. B VT9 -S. or M P U< U HK RS SV SP 5 > > 88 5 7 IMP t [ms] NSO_8 MP X M P X X S5 YC B S Q 8 PE 6 X YC Cycle counter motor J A N- storage device connector for connection of control circuits connector for external cycle counter switch indicating AUTO (NO-C)/MANUAL (NC-C) mode external VT9 -MF cycle counter recommended connection of control circuits (is not included in the motorized operating mechanism supply) pushbutton pushbutton switch for storage (closed = automatic storage; it can be closed permanently) motorized operating mechanism circuit breakersee page E69 In use of VT circuit breakers with mechanical interlocking by Bowden cable in the automatic standby system, it is recommended to switch the circuit breaker off only by an auxiliary release. Otherwise the first attempt of switching a standby circuit breaker may fail. B cav. no. NSO_78 HK RS SV SP Symbol HK RS SV SP IMP IMP IMP S X > X + 5 Description Main contacts Relative switch Pulse for shunt release Pulse for undervoltage release Motorized operating mechanism make pulse Motorized operating mechanism storage pulse (generated by S switch) Switched on > 88 > > 7 IMP 5 t [ms] Switched off by releases, or REVISI pushbutton NSO_8 Switched off maually or by motorized operating mechanism electrically (wound up state) Siemens LV 6 8 /5
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Overview Plug-in devices The plug-in design of the circuit breaker/switch disconnector is intended for demanding industrial applications where rapid exchange of the circuit breaker along with both visual and conductive disconnection of the circuit is needed. The device includes: - complete accessories for assembling circuit breakers/ switch disconnectors in plug-in design - a set of four installation bolts (M x ) for fixing the switching unit to the plug-in device The device must be fitted with: - a -pole VT 75-.AA6-AA switching unit or - a -pole VT 75-.AA6-AA or VT 75-.AA56-AA switching unit Withdrawable devices The withdrawable design of the circuit breaker/switch disconnector is intended for demanding industrial applications where rapid exchange of the circuit breaker, frequent checking and both visual and conductive disconnection of the circuit is needed. The device includes complete accessories for assembling circuit breakers/switch disconnectors in withdrawable design The device must be fitted with - a -pole VT 75-.AA6-AA switching unit or - a -pole VT 75-.AA56-AA or VT 75-.AA56-AA switching unit. VT9 -PA plug-in device Circuit breaker position The circuit breaker in plug-in design has two positions:. connected (operating position). removed Circuit breaker accessories in plug-in design The circuit breaker in plug-in design has the same accessories as the fixed-mounted circuit breaker. Advantages and enhanced safety for the operator Unambiguous remote signaling of the circuit breaker position in the plug-in device Option to lock the plug-in device with padlocks to prevent inserting of the circuit breaker Visible and conductive disconnection of the power circuit Easy exchange of the circuit breaker in case of a failure IP degree of protection of all termination points The plug-in device does not need earthing. VT9 -WA withdrawable device Circuit breaker position The circuit breaker in withdrawable design has three positions:. connected (operating position). withdrawn (maintenance position). removed Circuit breaker accessories in withdrawable design The circuit breaker in withdrawable design has the same accessories as the fixed-mounted circuit breaker. Advantages and enhanced safety for the operator Unambiguous remote and local signaling of the circuit breaker and arrestment positions in the withdrawable device Checking of circuit breaker and accessories function in the maintenance position Locking of the withdrawable device with padlocks - prevents inserting of the circuit breaker - locking of circuit breaker in inserted (operating) position - locking of circuit breaker in withdrawn (maintenance) position Visible and conductive disconnection of the power circuit Easy exchange of circuit breakers in case of failure IP degree of protection of all termination points The withdrawable device does not need earthing. /6 Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Plug-in design Design Plug-in devices Position signaling VT9 -WL position signaling switch VT9 -PA device Locking plug-in device against plug-in inserting the circuit breaker The plug-in device includes complete accessories for assembling a circuit breaker/switch disconnector in plug-in design from the original fixed-mounted design The components of the plug-in device are: - supporting part of the plug-in device connection sets (total of 6 terminals) for fitting on to the switching unit - interlocking connecting rod (ensures automatic switching off of the circuit breaker for handling inserting and removal) - set of mounting bolts for securing circuit breaker into plug-in device (to secure plug-in device into switchboard, a set of mounting bolts is used that is included in the scope of supply of the VT 75-.AA6-AA switching unit. Main circuit The VT9 -TA connecting set is used for connecting with busbars or cable lugs and is included in the scope of supply of the VT9 75-.AA6-AA switching unit For connecting in another way, it is necessary to use connecting sets (see page /9) The type of connections must comply with our recommendations (see page /). Auxiliary circuits These are connected using a VT9 -PL 5-wire cable. Coding VT9 -WN coding set The plug-in device may be provided with a maximum of four switches (for -pole version, max. 6 switches) for signaling the connected/removed position. States of VT9 -WL switches in the plug-in device according to the circuit breaker position Accessory compartment... (9, ) ) Circuit breaker position Connected Removed = contact open, = contact closed ) Accessory compartments 9 and are for -pole version only. Technical specifications Order No. VT9 -WL Rated operational voltage U e V AC AC 5 Rated isolation voltage U i V AC 5 Rated frequency f n Hz 5/6 Rated operational current I e /U e AC- A/ V DC-5.5 A/5 V, A/5 V, A/ V Thermal current I th A 6 Arrangement of contacts Connector cross-section S mm.5... Terminal protection (connected switch) IP For wiring diagram of the circuit breaker in plug-in device with accessories, see page /. Plug-in device with motorized operating mechanism The plug-in device and circuit breaker can be provided with a coding set, which prevents inserting any other circuit breaker into the plug-in device. Circuit breaker in plug-in design with motorized operating mechanism Siemens LV 6 8 /7
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Plug-in design With motorized operating mechanism Recommended wiring L+ B Q Motor drive X 9 7 NC MP X Motor drive control circuits S5 C NO 8 6 M P S 5 X NSO_8 Description Symbol M P M P X X S5 YC B S Q Description VT9 -M. motorized operating mechanism motor storage device terminal strip to connect control circuits terminal strip for external operations counter switch indicating AUTO (NO-C)/MANUAL (NC-C) modes VT9 -MF external operations counter recommended wiring of the control circuits (control circuits not included in motorized operating mechanism delivery) make pushbutton break pushbutton switch to store up energy motorized operating mechanism circuit breaker for AC V LSN C/ AC 8 V LSN C/ AC V LSN C/ AC V LSN C/ DC V LSN-DC C/ DC 8 V LSN-DC C/ DC V LSN-DC C/ DC V LSN-DC C/ Unplugging the circuit breaker with motorized operating mechanism Each time before removing the circuit breaker, we recommend first to turn the AUTO/MANUAL switch on the motorized operating mechanism to the MANUAL position More operating information can be found in the operating instructions Not adhering to this procedure or failing to follow the recommended wiring, could mean that the circuit breaker will not successfully turn on at the first attempt. PE N YC Operating counter Switches in the accessory compartments of the switching unit Changes in states of switches when inserting and withdrawing the circuit breaker State of switches before removing - connected position State of switches after removing - withdrawn Accessory compartment Accessory compartment (,5,6) ) (,5,6) ) Knob position of circuit breaker State of the main contacts VT9 -AC VT9 -AD VT9 -AC Switched on VT9 -AD VT9 -AC VT9 -AD VT9 -AC VT9 -AD VT9 -AC VT9 -AD VT 9-AC VT9 -AD Manually switched off or by motorized operating mechanism Switched off by releases Switched off from switched-on state: by means of auxiliary release, pushbutton or by pushbutton on the motorized operating mechanism = contact open, = contact closed ) Accessory compartments, 5, 6 are for -pole version only. /8 Siemens LV 6 8
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Withdrawable design Design Withdrawable devices Position signaling VT9 -WL position signaling switch Circuit breaker VT9 -WA in withdrawable design withdrawable device The withdrawable device includes complete accessories for assembling circuit breaker/switch disconnector in withdrawable design from the originally fixed-mounted design The components of the withdrawable device are: - supporting part of the withdrawable device - movable side plates - connection sets (total of 6 terminals) for fitting onto the switching unit - interlocking connecting rod (ensures automatic switching off of the circuit breaker for handling, inserting and withdrawing) - a set of mounting bolts is used to fasten the withdrawable device into the switchboard, and these are include with the VT 75-.AA6-AA switching unit Main circuit The VT9 -TA connecting set is used for connecting with busbars or cable lugs and is included in the scope of supply of the VT 75-.AA6-AA switching unit For connecting in another way, it is necessary to use connecting sets (see page /9) The type of connections must comply with our recommendations (see page /). Auxiliary circuits These are connected using the VT9 -PL 5-wire cable. Coding VT9 -WN coding set The withdrawable device can be provided with switches for signaling the position of the circuit breaker, see table. Technical specifications Order No. VT9 -WL Rated operational voltage U e V AC, 5 Rated isolation voltage U i V AC 5 Rated frequency f n Hz 5/6 Rated operational current I e /U e AC- A/ V DC-5.5 A/5 V, A/5 V, A/ V Thermal current I th A 6 Arrangement of contacts Connector cross-section S mm.5... Terminal protection (connected switch) IP For wiring diagram of the circuit breaker in plug-in device with accessories, see page /. States of VT9 -WL switches in withdrawable device according to circuit breaker and arrestment positions Circuit breaker and arrestment position Accessory compartment,,, 5,7 6,8 (9, ) ) (9, ) ) Connected and unarrested Withdrawn and unarrested Removed and unarrested = contact open; = contact closed ) Accessory compartments 9 and are for -pole version only. Operating state is always in arrested position In arrested position, it is possible to lock the withdrawable device (for more detailed information, see Advantages and enhanced safety for operator ) The withdrawable device and circuit breaker can be provided with coding set, which prevents inserting another circuit breaker into the withdrawable device. Locking the circuit breaker in withdrawable device against tampering Locking the withdrawable device against inserting the circuit breaker Siemens LV 6 8 /9
VT Molded Case Circuit Breakers up to 5 A Accessories and Components Mounting accessories Withdrawable design With motorized operating mechanism Description Recommended wiring Motor drive control circuits Q L+ S B Motor drive X 9 7 NC NO S5 C M P 5 Symbol MP M P X X S5 YC B S Q Description VT9 -M.. motorized operating mechanism motor storage device terminal strip to connect control circuits terminal strip for external operations counter switch indicating AUTO (NO-C)/MANUAL (NC-C) modes VT9 -MF external operations counter recommended wiring of the control circuits (control circuits not included in motorized operating mechanism delivery) make pushbutton break pushbutton switch to store up energy motorized operating mechanism circuit breaker for AC V LSN C/ AC 8 V LSN C/ AC V LSN C/ AC V LSN C/ DC V LSN-DC C/ DC 8 V LSN-DC C/ DC V LSN-DC C/ DC V LSN-DC C/ Inserting and withdrawing the circuit breaker with motorized operating mechanism Each time before inserting or withdrawing the circuit breaker, we recommend first to turn the AUTO/MANUAL switch on the motorized operating mechanism to the MANUAL position More operating information can be found in the operating instructions Not adhering to this procedure or failing to follow the recommended wiring, could mean that the circuit breaker will not successfully switch on at the first attempt. MP X 8 6 X NSO_8 PE N YC Operating counter / Siemens LV 6 8