Siemens AG VT Molded Case Circuit Breakers up to 6 A Catalog General data Overview Connecting sets 5 6 Switching unit 7 8 9 Accessies f plug-in and withdrawable devices 9 5 7 8 5 Accessies 6 6 7 8 9 NSO_a 5 6 7 8 9 Molded case circuit breaker Plug-in device Withdrawable device Box terminals Circular conduct terminal Multiple feed-in terminal Multiple feed-in terminal Rear connection Front connection Auxiliary conduct terminal 5 6 7 8 9 Rotary operating mechanism Lateral rotary operating mechanism Mechanical parallel switching Mechanical interlocking Mechanical interlocking by Bowden wire Mot operating mechanism Shunt trip unit Undervoltage trip unit Connecting cable Position signalling Keying pins 5 6 7 8 9 Auxiliary switch NC/NO Auxiliary switch NC/NO Auxiliary switch, change-over contact Auxiliary switch, early Lockingtype lever Sealing inset Additional cover f overcurrent releases Terminal cover Insulating barriers / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Catalog Circuit breakers Switch disconnects Overview Switching unit The switching unit includes: Two VT9 -TA connecting sets f connecting busbars cable lugs VT9-8CE insulating barriers A set of installation bolts (M5 x 5) The switching unit must be fitted with a trip unit (circuit breaker) a VT9 6-6DT switch disconnect unit (switch disconnect) F maximum circuit breaker/switch disconnect loads in accdance with the ambient temperature, see page /. F recommended cross-sections of cables, busbars and flexibars f fixed-mounted, plug-in and withdrawable versions, see page /. Circuit breaker The circuit breakers consist of a - -pole switching unit and a trip unit which is available with a choice of different characteristics. Switch disconnect The switch disconnect consists of a switching unit and a switch disconnect unit. Selection and dering data Switching units Rated current I n Breaking capacity I cu DT Order No. PS* Weight per PU approx. A ka kg -pole version 6 6 B VT 76-AA6-AA unit 7. 6 65 B VT 76-AA6-AA unit 7. -pole version, unprotected N 6 6 B VT 76-AA6-AA unit 7. 6 65 B VT 76-AA6-AA unit 7. -pole version, protected N 6 6 B VT 76-AA56-AA unit 7. 6 65 B VT 76-AA56-AA unit 7. * You can der this quantity a multiple thereof. Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Circuit breakers Switch disconnects Siemens AG Selection and dering data f accessies ETU trip units Rated current I n Current setting of the inverse- time delayed overload trip units L I r DT Order No. PS* Weight per PU approx. kw A kg Line protection, ETU LP, LI function ) f protecting lines with low starting currents without I r regulation 5 5 B VT9 5-6AB unit.5 5 5 B VT9-6AB unit.5 B VT9-6AB unit.5 5 5 B VT9 5-6AB unit.5 6 6 B VT9 6-6AB unit.5 Distribution protection, ETU DP, LI function ) f protecting lines and transfmers 5... 5 B VT9 5-6AC unit.6 6... B VT9-6AC unit.8 6 5... 6 B VT9 6-6AC unit. Distribution protection with N-pole protection, ETU DPN, LIN function ) f protecting lines and transfmers in TN-C-S and TN-S netwks 5... 5 B VT9 5-6BC unit.55 6... B VT9-6BC unit.55 6 5... 6 B VT9 6-6BC unit.55 Mot/generat protection, ETU MP, LI function ) f direct protection of mots and generats suitable also f protecting lines and transfmers 5... 5 B VT9 5-6AP unit.6 6... B VT9-6AP unit. 6 5... 6 B VT9 6-6AP unit. Mot/generat protection, ETU MPS, LSI function ) f direct protection of mots and generats. suitable also f protecting lines and transfmers enables setting time delay of time-independent trip unit to,, ms 5... 5 B VT9 5-6AS unit.6 6... B VT9-6AS unit.6 6 5... 6 B VT9 6-6AS unit. Switch disconnect unit 6 Switch disconnect unit ) B VT9 6-6DT unit.5 ) Use only with switching unit VT76-.AA6-AA VT76-.AA6-AA. ) Use only with switching unit VT76-.AA56-AA / Siemens LV 6 * You can der this quantity a multiple thereof.
Siemens AG VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Auxiliary switches Auxiliary trip units Overview The circuit breakers can be equipped with auxiliary switches, alarm switches, shunt trip units, undervoltage trip units. Shunt trip units can trip the circuit breaker from a remote location. A control supply voltage is required. An undervoltage trip unit trips the circuit breaker automatically when the circuit voltage drops below 7 % U e. The undervoltage trip unit protects mots and other equipment in case of undervoltage. A control supply voltage is required. Selection and dering data Rated control supply voltage U s DT Order No. PS* Weight per PU approx. AC 5/6 Hz, DC kg Auxiliary switches and alarm switches Single NO contacts AC/DC 6... 5 V B VT9 -AC unit. AC/DC 5... 6 V B VT9 -AC unit. 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. Changeover 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 trip units 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 trip units 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 B VT9 -UC unit. AC/DC V B VT9 -UD unit. AC,, 5 V/DC V B VT9 -UE unit. ) Not to be used with VT9 -M.. motized operating mechanism. * You can der this quantity a multiple thereof. Siemens LV 6 /5
VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Manual/motized operating mechanisms Siemens AG Overview Rotary operating mechanisms The rotary operating mechanism must be combined from: F rotary operation of the circuit breaker: - VT9 -HA. VT9 -HB. f frontside operation - VT9 -HE VT9 -HE black knob - VT9 -HF red knob F operation through the switchgear cabinet do: - VT9 -HA. VT9 -HB. f frontside operation - VT9 -HJ.. extension shaft - VT9 -HG/HH.. coupling driver - VT9 -HE/HF.. knob. F operation through side wall of cabinet: - VT9 -HC f right side operation OR - VT9 -HD f left side operation - VT9 -HJ..extension shaft Selection and dering data - VT9 -HG/HH.. coupling driver f do-coupling operating mechanism - VT9 -HE/HF.. knob Mechanical interlocks and interlock f parallel switching Mechanical interlocks f fixed-mounted version must be combined from the following parts: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob Mechanical interlocking by Bowden wire is intended f fixed-mounted, plug-in and withdrawable versions Mechanical interlocks must be combined from the following parts: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob Version Col DT Order No. PS* Weight kg Rotary operating mechanisms not lockable gray B VT9 -HA unit. lockable with padlock gray B VT9 -HA unit. lockable with padlock yellow label B VT9 -HB unit. f lateral operation, mounted on the right side, not lockable grey N B VT9 -HC unit. f lateral operation, mounted on the left side, not lockable grey N B VT9 -HD unit. Knobs f rotary operating mechanism not lockable 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 f do-coupling operating mechanism To be used with the VT9 -HE VT9 -HE black knob degree of protection IP black B VT9 -HG unit. degree of protection IP66 black B VT9 -HG unit. Is used in combination 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 shtened B VT9 -HJ unit.5 Extension shaft, telescopic, length 5... mm B VT9 -HJ unit.55 /6 Siemens LV 6 * You can der this quantity a multiple thereof.
Siemens AG VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Manual/motized operating mechanisms Version DT Order No. PS* Weight per PU approx. kg Mechanical interlocks The mechanical interlocks additionally require the following parts: x VT9 -HA../HB.. rotary operating mechanisms, x VT9 -HE../HF.. knobs Mechanical interlocks f fixed-mounted version only B VT9-8LA unit.6 Mechanical interlock f parallel switching f fixed-mounted version only B VT9-8LB unit.6 Mechanical interlocking by Bowden wirer f two VT circuit breakers B VT9-8LC unit.9 f one VT and one VT circuit breaker B VT9-8LC unit.9 Motized operating mechanisms with stage spring Rated control supply voltage U s Motized operating mechanism AC/DC V B VT9 -MJ unit.69 AC/DC 8 V B VT9 -ML unit.75 AC/DC V B VT9 -MN unit.75 AC V/DC V B VT9 -MQ unit.76 Motized operating mechanism with operations counter AC/DC V B VT9 -MJ unit.75 AC/DC 8 V B VT9 -ML unit.75 AC/DC V B VT9 -MN unit.78 AC V/DC V B VT9 -MQ unit.75 Accessies f motized operating mechanisms Operations counter with cable, length cm B VT9 -MF unit. Extension cable f motized operating mechanism, wires, length 6 cm B VT9 -MF unit.6 * You can der this quantity a multiple thereof. Siemens LV 6 /7
VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Mounting accessies Siemens AG Overview Plug-in version The plug-in base includes: - complete accessies f assembling circuit breakers/ switch disconnects in plug-in design - a set of four installation bolts (M5 x ) f fixing the switching unit to the plug-in base The plug-in base must be outfitted with: - -pole version: VT 76-.AA6-AA switching unit - -pole version: VT 76-.AA6-AA VT 76-.AA56-AA switching unit F mounting the plug-in version on busbars cable lugs, VT9 -TA connecting sets are available. These are included in the scope of supply of the VT 76-.AA6-AA - pole version ; VT 76-.AA6/56-AA... -pole version switching unit. F other types of connection, other connecting sets are available. Selection and dering data Withdrawable version The withdrawable version base includes complete accessies f assembling circuit breakers/switch disconnects in withdrawable version. The circuit breaker inside the withdrawable version base can be moved between an operating position and a checking position (withdrawn). The withdrawable version base must be fitted with: - -pole version: VT 76-.AA6-AA switching unit - -pole version: VT 76-.AA6-AA VT 76-.AA56-AA switching unit Plug-in bases Version Max. permissible cross-section S DT Order No. PS* Weight per PU approx. mm kg -pole version B VT9 -PA unit.6 -pole version B VT9 -PA unit, Withdrawable version bases -pole version B VT9 -WA unit 5, -pole version B VT9 -WA unit,5 /8 Siemens LV 6 * You can der this quantity a multiple thereof.
Siemens AG VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Connecting accessies Selection and dering data Connecting Sets Version Max. permissible cross-section S mm Connecting sets f -pole version Box terminals 5... Cu Cables, flexibars Type of connection DT Order No. PS* Weight per PU approx. kg B VT9 -TC unit. Terminals f circular conducts F enhancing termination point protection to degree of protection IP, use the VT9-8CB terminal cover 5... 5 Cu/Al cables B VT9 5-TD unit. 5... Cu/Al cables B VT9 -TD unit.79 x 5... 5 Cu/Al cables B VT9 5-TF unit.8 x 5... Cu/Al cables B VT9 -TF unit.7 6 x 6... 5 Cu/Al cables B VT9 -TF unit. Terminals f rear connection set = units Terminals f front connection set = units Cu/Al busbars cable lugs Cu/Al busbars, cable lugs, flexibars Potential terminals.5....5;... 6 Cu flexible conducts B VT9 -RC unit.567 B VT9 -TA unit.86 B VT9 -TN unit. Front connection bars f increased pole spacing Cu/Al busbars cable lugs, flexibars B VT9 -ED unit.9 f increased pole spacing Cu/Al busbars cable lugs, flexibars B VT9 -EE unit.68 Single terminals f - -pole version Box terminal set = unit 5... Cu Cables, flexibars Terminals f circular conducts set = unit B VT9 -TC unit.58 5... 5 Cu/Al cables B VT9 5-TD unit. 5... Cu/Al cables B VT9 -TD unit.7 x 5... 5 Cu/Al cables B VT9 5-TF unit.5 x 5... Cu/Al cables B VT9 -TF unit.96 6 x 6... 5 Cu/Al cables B VT9 -TF unit.5 Terminal f rear connection set = unit Cu/Al busbars cable lugs B VT9 -RC unit.5 * You can der this quantity a multiple thereof. Siemens LV 6 /9
VT Molded Case Circuit Breakers up to 6 A Catalog - Accessies and Components Further accessies Selection and dering data Siemens AG Version DT Order No. PS* Weight per PU approx. kg Insulating barriers Included in the scope of supply of the switching unit; in case the circuit breaker/switch disconnect 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, f -pole version B TV9-8CE unit.77 one piece, additionally needed f -pole version B VT9-8CE unit.5 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 VT9 -TF block type terminals, intended f fixed-mounted, plug-in and withdrawable versions. -pole version B VT9-8CB unit. -pole version B VT9-8CB unit.9 Locking device f knob B VT9 -HL unit. Enables locking the circuit breaker in switched off manually position. F locking the device, you can use up to three padlocks with a shank diameter of max. 6 mm Bolt sealing insert B VT9-8BN unit. Provides sealing f: trip unit accessy compartment cover terminal cover rotary operating mechanism operating mechanism Additional cover f trip unit B VT9-8BL unit.8 Provides protection f trip units Connecting cable B VT9 -PL unit. F connecting the circuit breaker/switch disconnect accessies in withdrawable version (can also be used f plug-in and fixed-mounted versions) Position signalling switch B VT9 -WL unit. F indicating the position of the circuit breaker in the plug-in base withdrawable version base Coding set B VT9 -WN unit. Prevents insertion of the wrong switching unit into the plug-in base withdrawable version base Pushbutton cover B VT9 -MF unit.5 F motized operating mechanism / Siemens LV 6 * You can der this quantity a multiple thereof.
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation Circuit breakers Switch disconnects Design Installation and connection Main circuit Is connected using Cu Al busbars cables, and possibly cables with cable lugs F further connecting options, connecting sets are available (see page /9) Generally, conducts from the power supply are connected to input terminals,, 5, (N) and conducts from the load to terminals,, 6, (N). However, it is possible to reverse this connection (exchanging input and output terminals) without limiting the rated sht-circuit ultimate breaking capacity I cu ) In case of feed-in from below, the circuit breakers/switch disconnects must be fitted with VT9-8CE insulating barriers on the bottom side of the circuit breaker/switch disconnect We recommend painting the connecting busbars in different cols Input and output conducts/busbars must be mechanically reinfced to avoid transmitting electrodynamic fce to the circuit breaker/switch disconnect during sht-circuiting The power circuit must be connected in such a way that the deionizing space of the circuit breaker/switch disconnect is not obstructed (see page /). Auxiliary circuits Auxiliary switches, shunt trip units undervoltage trip units are connected to terminals using flexible.5... mm Cu conducts. The motized operating mechanism and auxiliary circuits of the plug-in base withdrawable version base are connected with a connect. Recommended cross-sections of cables, busbars and flexibars f fixed-mounted, plug-in and withdrawable versions Rated current I n Permissible cross-section S Dimensions of busbars W x H Cu AI Cu Al A mm mm mm mm 5 5 x 5 x 5 5 7 5 x 5 x 6 7 95 5 x x 95 5 x 5 x 5 5 5 5 x 5 x 5 5 5 85 x 5 x 6 85 x 6 x 8 5 x x85 x 8 x 6 x85 x x x 6 Maximum circuit breaker/switch disconnect loads in accdance with the ambient temperature VT circuit breaker/switch disconnect connection to pole by x 85 mm Cu cable 5 C 55 C 6 C 65 C 7 C 6 A 6 A 6 A 57 A 5 A Conduct cross-sections of main terminals Order No. Maximum permitted current I max Maximum permissible conduct cross-section S Cable type Sect-shaped conduct, stranded Sect-shaped conduct, solid Round conduct, stranded Round conduct, solid Busbars and cable lugs Technical infmation W x H A mm mm mm mm mm See page VT9 -TA 6 x... VT9 -TD VT9 -RC 6 x... /7, /58, VT9 -RC /58, /58 VT9 -TC 5... Cu 5... Cu 5... Cu 5... Cu -- VT9 -TC VT9 -TD 5... Cu/Al... Cu/Al 5... Cu/Al... Cu/Al VT9 -TD VT9 5-TD 5 5... 5 Cu/AI 6... 5 Cu/AI 5... 5 Cu/AI 6... 5 Cu/AI VT9 5-TD VT9 -TF 6 x (5... ) Cu/Al x (... ) Cu/Al x (5... 5) Cu/Al x (... ) Cu/Al /6, /57 VT9 -TF VT9 5-TF 5 x (5... 5) Cu/Al x(6...5) Cu/Al x (5... 5) Cu/Al x (6... 5) Cu/Al /7, /58 VT9 5-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 /7, /58 VT9 -TF VT9 -ED /8 VT9 -EE 6 /8 VT9 -TN /6.5....5... 6 flexible conduct Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation Circuit breakers Switch disconnects Siemens AG Technical specifications Description Circuit breakers Switch disconnect unit Order number VT 76-AA6/6/56-AA, VT9 6-6DT VT 76-AA6/6/56-AA Standards EN 6 97-, IEC 97- EN 6 97-, IEC 97- Approval marks Number of poles, Rated current I n A 5, 5,, 5, 6 -- Rated uninterrupted current I u A 6 Rated operational current I e A -- 6 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 categy Selectivity AC 69 V A -- Switching mode AC 69 V DC V -- -- AC- B DC- B Rated sht-time withstand current U e = AC 69 V I cw /t 8 ka/5 ms, 7 ka/ ms, 6.5 ka/ s 7,5 ka/5 s Series U e VT N VT H U e -- Rated ultimate sht-circuit breaking capacity (rms value) ) I cu Rated sht-circuit breaking capacity (rms value) I cs /U e 6 ka 6 ka ka 5 ka ka 8 ka ka 8 ka ka 65 ka 5 ka ka 75 ka 6 ka ka 5 ka AC V AC 5 V AC 5 V AC 69 V AC V AC 5 V AC 5 V AC 69 V Rated sht-ckt 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 = 6 A W 75 Mechanical endurance cycles Electrical endurance (U e = AC 5 V ) cycles 5 Switching frequency cycles/ hr Operating fce N Front-side device protection IP Terminal protection IP Operating conditions Reference ambient temperature C Ambient temperature range C -... +55 Wking environment dry and tropical climate Degree of pollution Max. elevation m Seismic resistance m/s g at 8... 5 Hz Design modifications Front/rear connection Plug-in design Withdrawable design Accessies Switches-auxiliary/relative/signal/leading Shunt trip unit Undervoltage trip unit/with leading switch, with alarm switch Front rotary oper. mechanism/lateral oper. mech. right/left Mechanical interlocking to the rotary oper. mechanism, by Bowden wire Motized oper. mechanism with operations counter Locking-type lever Bolt sealing insert/additional cover f trip unit / /+ /+ / / / / / / -- -- available, -- unavailable + in preparation ) If the circuit breaker connection is reversed (input terminals,, 6, output terminals,, 5), I cu does not change. / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation Circuit breakers Switch disconnects Schematics Circuit breakers with accessies -pole version Recommended wiring of the control circuits L+ Q OFF B Mot drive ON S Auxiliary trip/leading Plug-in device/withdrawable device 5 VT9 -PA. SO VT9 -WA. Main circuit X NC NC NO 9 7 NO 5 A VT9 -U. B VT9 -S. A.Y VT9 -U..Y VT9 -U..Y VT9 -AJ VT9 5-6.. I> I> 5 A S6 C S5 C M P U< U U< V TEST Q T T T B MP X 8 6 PE N- X YC Ext.oper. counter A J B A.Y acc.comp. no..y.y VT9 -PA. SO SO VT9 - WA. Plug-in device/withdrawable device 6 6 NSO_9 Connecting cable 5 6 7 8 9 5 X Switches signal relative auxiliary auxiliary auxiliary auxiliary A B.... VT9 -AC.. VT9 -AD VT9 -AH. acc.c. no..... VT9 -AC VT9 -AD VT9 -AH....... VT9 -AC VT9 -AD VT9 -AH....... VT9 -AC VT9 -AD VT9 -AH... 5. 5. 5. 5. VT9 -AC VT9 -AD VT9 -AH 5. 5. 5... VT9 -AG.... VT9 -AF.... VT9 -AE.. acc.c. no. acc.c. no. acc.c. no. acc.c. no. 5 acc.c. no. + NSO_5 X 5 6 7 8 9 5 Connecting cable Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation Circuit breakers Switch disconnects -pole version Siemens AG Recommended wiring of the control circuits L+ B Q OFF ON S Plug-in device/withdrawable device 5 VT9 -PA. SO VT9 -WA. N Mot drive Auxiliary trip/leading Main circuit X 9 7 NC NO NC NO S6 C S5 C MP 5 A VT9 -U. B VT9 -S. A.Y VT9 -U..Y M P U< U U<.Y VT9 -AJ V TEST VT9 5-6.. I> I> Q T 5 7 T T T A B X 8 6 PE N- X YC Ext.oper. counter A J B A.Y acc.comp. no..y.y VT9 -PA. SO SO VT9 - WA. 6 8 Plug-in device/withdrawable device 6 N NSO_5 Connecting cable 5 6 7 8 9 5 X Switches signal relative auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary................ 5. 5. 5. 5....... 6. 6. 6. 6. 7. 7. 7. 7. 8. 8. 8. 8. 9. 9. 9. 9. A B VT9 -AC.. VT9 -AD. VT9 -AH acc.c. no. VT9 -AC VT9 -AD VT9 -AH... VT9 -AC VT9 -AD VT9 -AH... VT9 -AC VT9 -AD VT9 -AH... VT9 -AC VT9 -AD VT9 -AH 5. 5. 5. acc.c. no. acc.c. no. acc.c. no. acc.c. no. 5 VT9 -AG.. VT9 -AF.. VT9 -AE.. acc.c. no. + VT9 -AC VT9 -AD VT9 -AH VT9 -AC VT9 -AD VT9 -AH VT9 -AC VT9 -AD VT9 -AH VT9 -AC VT9 -AD VT9 -AH 6. 6. 6. 7. 7. 7. 8. 8. 8. 9. 9. 9. acc.c. no. 6 acc.c. no. 7 acc.c. no. 8 acc.c. no. 9 NSO_5 X 5 6 7 8 9 5 Connecting cable / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation Circuit breakers Switch disconnects MP VT9 -M.. motized operating mechanism M Mot P Energy stage device X Connect to connect control circuits X Connect f external operations counter S5 Switch to signal AUTO (NO-C) / MANUAL (NC-C) modes S6 Switch to signal full stage (ready to switch on: NO-C) YC External operations counter, VT9 -MF B Recommended wiring of the control circuits - not included with drive ON, OFF Pushbutton S Switch f energy stage (switched on = automatic stage, switch may be continuously switched on) Q Circuit breaker f motized operating mechanism J VT switching unit Q Main contacts T, T, T, T ) Current transfmers V Trip-free mechanism VT9 5-6.. VT9 6-6DT circuit breaker - trip unit - ETU LP, DP, MDP switch-disconnect - switch-disconnect unit TEST Pushbutton to test trip unit VT9 -PA -pole plug-in base VT9 -WA -pole withdrawable version base X, X VT9 -PL connecting cable SO, SO, SO Contacts signalling position of circuit breaker/switch disconnect in plug-in base withdrawable version base (Position signalling switch VT9 -WL) VT9 -U. Undervoltage trip unit VT9 -S. Shunt trip unit VT9 -U. Undervoltage trip unit with leading contact VT9 -AJ Leading contact acc. c. no. Accessy compartment number ) Only f -pole version of the VT 76-.AA6-AA switching unit. Functions States of auxiliary switches located in the switching unit accessy compartment Circuit breaker state Lever position of circuit breaker State of the main contacts Accessy compartment,, 5 and and and,, 5 (6... 9) ) (6... 9) ) VT9 -AC VT9 -AD VT9 -AC VT9 -AD VT9 -AC VT9 -AD Switched no VT9 -AJ VT9 -U. VT9 -AG VT9 -AF VT9 -AE VT9 -AH VT9 -AH VT9 -AH Switched off manually electrically by operating mechanism Switched off by trip unit Switched off by auxiliary trip unit by TEST button the trip pushbutton on the motized operating mechanism = contact open, = contact closed ) Accessy compartment 6, 7, 8, 9 are only f.pole design. Siemens LV 6 /5
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Siemens AG Overview The electronic trip unit is a separate and interchangeable unit, which has to be dered in addition to the VT switching unit. By exchanging the trip unit, the range of the circuit breaker s rated current can be easily changed. Trip units f VT switching units are available f current values of I n = 5, and 6 A. The ETU LP trip units feature rated currents of 5, 5,, 5 and 6A. The trip units (including regulation of -6%) cover a current range from to 6 A. Tripping characteristics Several different trip units are available. Some have adjustable characteristics (in der to match the protected device and to achieve the required selectivity): ETU LP trip units t L I ETU MP trip units t NSO_5 I r L t r I i I 5 ms ms Electronic trip units ETU LP have have me characteristics with adjustable I r, t r and I rm. ETU MPS trip units L S I I t I r NSO_5 I Electronic trip units ETU LP have one type of characteristic and fixed I n and I rm settings. ETU DP trip units t NSO_5 I r L I i I I Electronic trip units ETU DP have one type of characteristic with adjustable I r and I rm. NSO_ t r I sd t sd I Electronic trip units ETU MPS have me characteristics with adjustable I r, t r, I sd and t sd. ETU LP, DP, MP and MPS trip units are intended f -pole VT 76-.AA6-AA switching units and -pole VT 76-.AA6-AA switching units with disconnecting of the N pole. ETU DPN trip units t I N I r L t r I I i NSO_5 I ETU DPN trip units are intended f -pole VT 76-.AA56- AA switching units with protected N pole. They have me characteristics with adjustable I r, t r, I rm and I N. /6 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Trip units ETU LP, DP, MP and MPS - description of function Proper functioning of trip units does not depend on the current wavefm in the main circuit. The function of the trip unit is suppted by a microprocess, which processes a sampled signal of the main circuit and recalculates it to obtain an rms value. Therefe, the trip units are suitable f protecting circuits where the sinusoidal current is distted by high harmonics (e.g. circuits with controlled rectifiers, power fact compensats, pulse loading, and the like). All the trip units protect a circuit against sht-circuiting and overloading. Tripping characteristic of the trip units is independent of the ambient temperature. The trip unit is attached to the switching unit by two bolts. The translucent cover over the adjustment controls can be sealed (with sealing wire). Setting the tripping characteristics The tripping characteristic of the trip units is defined by standard EN 697-. F trip units ETU DP, MP, MPS and DPN, the characteristic is adjusted with latched switches located on the trip unit. A visual demonstration on setting the tripping characteristic is available in the SIMARIS design software (Tool f Dimensioning Electrical Power Distribution). 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 sht-circuit protection f lines. Intentional delay in tripping of these low sht-circuit currents can be used to achieve selectivity of protective devices. F ETU MPS trip units, the delay can be set at,, ms. I is a zone of high overcurrents and includes protection against ultimate sht-circuit currents. F ETU MP trip units, the time delay can be set at 5 ms.. Time-dependent trip unit (thermal) L The time-dependent trip unit ETU DP is adjusted using one I r switch. The I r switch adjusts the circuit breaker s rated current, with the characteristic shifting on the current axis. The trip unit is set to one type of characteristic. The time-dependent trip units ETU MP, MPS and DPN are adjusted with two switches, I r and t r. The first ( I r ) switch adjusts the circuit breaker s rated current. The characteristic moves along 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 along the time axis. Using the t r switch, it is possible to set a total of 8 characteristics. ETU MP and MPS trip units have characteristics f mot protection and characteristics f protecting lines. Breaking times crespond to trip unit classes A,,,. By changing t r, it is possible to select the trip unit characteristic accding to the required mot starting characteristic (light, medium, heavy very heavy starting). ETU DPN trip units have 8 characteristics f protecting lines transfmers. It is not possible to turn the circuit breaker back on immediately after the time-dependent trip unit has been actuated and the circuit breaker has tripped. The trip unit must be allowed to cool off (it has a thermal memy). The thermal memy can be disabled by turning the switch from the nmal T t position to the T position. In the T position the time-dependent trip unit remains active, and only its thermal memy is deactivated. Switching off the thermal memy should be used only in well-justified cases, and with the knowledge that there could be rising temperature in the protected device, causing repeated tripping.. Delayed time-independent trip unit S This trip unit characteristic is available only in ETU MPS trip units. It is used to set up a selective cascade of circuit breakers. It is set up using parameters I sd and t sd. I sd is an n-multiple of current I r (I sd = n I r ). I sd is a sht-circuit current that, within the span of I i to I i, will trip the circuit breaker with delay t sd, where t sd is a delay set up f switching off the trip unit. The delayed timeindependent trip unit 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 sd.. Time-independent instantaneous trip unit (sht-circuit trip unit) I F trip units ETU DP, MP and MPS, the time-independent instantaneous trip unit is adjusted with the I i switch. The I i switch is used f setting up the sht-circuit current that, when reached exceeded, causes instantaneous tripping of the circuit breaker. Siemens LV 6 /7
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Siemens AG Tripping characteristics of ETU LP, DP, MP, MPS and DPN trip units 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, befe the moment when an overcurrent develops, current is flowing through the circuit breaker. Characteristics of electronic trip units are independent of the ambient temperature and are plotted in a cold state. Digital trip units enable simulation of tripping in warm state. The tripping times become shter 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 f 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 shter. k [-]..8 NSO_55 Trip units ETU LP - Lines protection Provides protection f lines with low starting currents The VT9..-6AB trip unit is intended f the VT76-.AA6-AA and VT76-.AA6-AA switching units. The LP trip unit has a thermal memy that cannot be disabled. The rated currents of the trip units are given by their der numbers and crespond to a standardized series of currents (see specifications table). The sht-circuit trip unit is fixed-set at I n. One of the advantages of the LP trip unit is its simplicity, because it does not require any adjustment. Therefe, it is intended f less complicated applications. Specifications Order No. Rated current I n Instantaneous sht circuit protection I rm A A VT9 5-6AB 5 VT9-6AB 5 6 VT9-6AB 6 VT9 5-6AB 5 VT9 6-6AB 6 5.6.. Decrease of tripping time with load T - When tripping from the trip unit s warm state, the tripping time of the characteristic is cut sht during the standstill time t u by coefficient k. Thermal standstill time of the characteristics F all trip units, the thermal standstill time is t u min. During this time, the tripping time t sd is cut sht from the cold-state characteristic by the coefficient k. The real tripping time is t s = k. t sd Example. 5 6 7 8 9 I r [%] The shtening constant can be read from the diagram. With steady current 85% of I r the real tripping time will be decreased to: t s =.7. t sd k [ ] time shtening coefficient I r [A] adjusted rated current of the trip units t sd [s] tripping time of the trip unit, derived from the characteristic t s [s] real tripping time of the trip unit, tripped from warm state t u [s] standstill period f particular characteristics Trip units 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 T Tripping characteristics t [s] 5 5 5 5.5...5...5 I r L I n = 5 A I n = 5 A I n = A I n = 5 A I n = 6 A I i NSO_56 5 5 x I n I In = 6 A In = 5 A In = A In = 5 A In = 5 A /8 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Trip units ETU DP - Distribution protection Provides protection f lines and transfmers The VT9..-6AC trip unit is intended f VT76-.AA6- AA and VT76-.AA6-AA switching units. Operation of the trip unit is controlled by a microprocess. The trip unit is equipped with a thermal memy that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling the thermal memy, the thermal trip unit remains active. The operational state 7% of I r is signalled by an LED indicat 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 just befe tripping will begin to blink red. Located on the lower part of the trip unit cover are two photocells f communicating with the signalling unit. The trip units have tripping characteristics especially designed f practical purposes, in der to provide optimal exploitation of transfmers up to.5 I r. The trip units have simple adjustment of the tripping characteristic. Set-up includes only the rated current and the sht-circuit tripping level at I r 8 I r. Tripping characteristics 5 t [s] 5 5 5.5...5....5.. min. I n = 5 A I n = A I n = 6 A I n = 5 A I n = A L..5 I n = 6 A.....5 I r max. x x x.5x x.5x x.5x x.5x.5x.5x NSO_57 Ir = 575 A.6 A ~ Ii = 7 ka 5 5 xi n I r I I i I i I i I i Adjustable specifications Order No. Rated current I n A Overload Restart Instantaneous protection I r sht A 5 5 7 6 circuit protection I i VT9 5-6AC 5 7 T () xi r 8 T (t),5 x I r 9 5 6 7 8 9 VT9-6AC T () xi r T (t),5 x I r 5 75 9 5 5 6 5 6 75 9 5 5 5 6 T () xi r VT9 6-6AC 6 T (t),5 x I r 5 55 8 5 55 575 6 Siemens LV 6 /9
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Siemens AG Trip units ETU MP - Mot protection Provides protection f mots and generats Can protect lines and transfmers The VT9..-6AP trip unit is intended f VT76-.AA6- AA and VT76-.AA6-AA switching units. The operation of the MP trip unit is controlled by a microprocess. The MP trip unit is equipped with a thermal memy that can be disabled by turning a switch located on the front panel from position T (t) to position T (). After disabling of the thermal memy, the thermal trip unit remains active. When one 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 trip unit). Another parameter f adjusting the trip unit consists of the rated current and sht-circuit tripping level. The time delay of the sht-circuit trip unit can be set to ms 5 ms. The operational state 7% of I r is signalled by an LED indicat 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 just befe tripping will begin to blink red. Located on the lower part of the trip unit cover are two photocells f communicating with the signalling unit. The trip units have tripping characteristics especially designed f practical purposes that provide f optimal exploitation of transfmers up to.5 I r. A total of 8 characteristics can be set on the trip unit. Mode M provides characteristics suitable f protecting mots and in mode TV are characteristics f protecting transfmers and lines. The shape of each characteristic can be changed using a select switch. Adjustable specifications Order No. Rated Overload current protection I n I r t r (7. x I r ) Restart Instantaneous sht circuit protection I i A A s ka ms (TV ) T (), (TV ) T (),6 5 (TV ) T (), 5 (TV ) T (),5 7 (M ) T (), 5 (M 5) T (),5 6 8 (M 8) T (), VT9 5-6AP 5 7 (M ) T (),75 8 (M ) T (t),75 9 8 (M 8) T (t), 5 (M 5) T (t).5 (M ) T (t), 5 (TV ) T (t),5 (TV ) T (t), (TV ) T (t),6 5 (TV ) T (t), 6 (TV ) T (),5 7 (TV ) T (), 8 (TV ) T (),6 9 (TV ) T (), (M ) T (), 5 (M 5) T (), 8 (M 8) T () 5, VT9-6AP (M ) T () 6, (M ) T (t) 6, 5 8 (M 8) T (t) 5, 75 5 (M 5) T (t), 9 (M ) T (t), 5 (TV ) T (t), 5 5 (TV ) T (t),6 6 (TV ) T (t) (TV ) T (t),5 5 (TV ) T (),8 6 (TV ) T (), 75 (TV ) T ( 9 (TV ) T ()) 5 (M ) T () 5 5 (M 5) T () 5, 5 8 (M 8) T () 6, VT9 6-6AP 6 6 (M ) T () 7 (M ) T (t) 6, 5 8 (M 8) T (t) 6, 55 5 (M 5) T (t) 5, 8 (M ) T (t) 5 (TV ) T (t) 5 55 (TV ) T (t) 575 (TV ) T (t), 6 (TV ) T (t),8 / Siemens LV 6
Tripping characteristic VT9...-6AP-ETU MP Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units 5 t [s] 5 5 min. L I r max. t r I r t r ms 5 ms I i TV 5 t [s] 5 5 L min. I r max. t r I r t r ms 5 ms I i NSO_58 M 5.5...5....5.. I n = 5 A I n = A I n = 6 A I n = 5 A I n = A..5 I n = 6 A.....5..5 5 5 5.6...6.8....5..5.75 5.... 6. 6... 5. 7. 5 5 x I n I I i [ka] I i [ka] I i [ka] 5.5...5....5.. I n = 5 A I n = A I n = 6 A I n =5 A I n = A..5 I n =6 A.....5..5 5 5 5.6. 5 8..6.8.. 5 8..5..5.75 5.... 6. 6... 5. 7. 5 5 x I n I I i [ka] I i [ka] I i [ka] Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Siemens AG Trip units ETU MPS - Mot protection, setting timing selectivity Provides protection f mots and generats Adjustable specifications Can protect lines and transfmers Enables adjusting time delay of time-independent trip units Order No. Rated Overload t r (7. x I r ) Restart Instantaneous current protection sht circuit The VT9..-6AS trip unit is designed f VT76-.AA6- I n I r protection I i AA and VT76-.AA6-AA switching units. The operation A A S ka ms of the trip unit is controlled by a microprocess. The trip unit is (TV ) T equipped with a thermal memy that can be disabled by turning a switch on the front panel from position T (t) to position T (). (TV ) T () 5 () After disabling of the thermal memy, the thermal tipping function 5 (TV ) T () 7 remains active. 5 (TV ) T () 9 When one two phases fail (due to current greater than I r in the 7 (M ) T () remaining phases), in the M-characteristic mode, the switch will 5 (M 5) T () 5 open with a s delay (so-called undercurrent trip unit). 6 8 (M 8) T () 7 Another parameter f adjusting the trip unit consists of the rated VT9 5-6AS 5 7 (M ) T current and tripping level of the delayed sht-circuit trip unit. () 9 The time delay (t v ) can be set on the delayed sht-circuit trip 8 (M ) T (t) unit at,, ms. The operational state 7% of I r is 9 8 (M 8) T (t) 5 signalled by an LED indicat that flashes green in a.5 s interval. As the load grows, the blinking frequency of the diode in- 5 (M 5) T (t) 7 (M ) T creases. In case of a load larger than % of I r, this LED will (t) 9 turn red and just befe tripping will begin to blink red. Located (TV ) T (t) on the lower part of the trip unit cover are two photocells f communicating with the signalling unit. (TV ) T (t) 5 (TV ) T (t) 7 The trip units have tripping characteristics especially designed 5 (TV ) T (t) 9 f practical purposes that provide f optimal exploitation of 6 (TV ) T transfmers up to.5 I r. A total of 8 characteristics can be set () on the trip unit. Mode M provides characteristics suitable f 7 (TV ) T () 5 protecting mots, and mode TV incpates characteristics 8 (TV ) T () 7 f protecting transfmers and lines. The shape of each characteristic can be changed with a select switch. 9 (TV ) T () 9 (M ) T () 5 (M 5) T () 5 8 (M 8) T () 7 % VT9-6AS (M ) T () 9 (M ) T (t) 5 8 (M 8) T (t) 5 75 5 (M 5) T (t) 7 9 (M ) T (t) 9 5 (TV ) T (t) 5 (TV ) T (t) 5 6 (TV ) T (t) 7 (TV ) T (t) 9 5 (TV ) T () 6 (TV ) T () 5 75 (TV ) T () 7 9 (TV ) T () 9 5 (M ) T () 5 5 (M 5) T () 5 5 8 (M 8) T () 7 VT9 6-6AS 6 6 (M ) T () 9 (M ) T (t) 5 8 (M 8) T (t) 5 55 5 (M 5) T (t) 7 8 (M ) T (t) 9 5 (TV ) T (t) 55 (TV ) T (t) 5 575 (TV ) T (t) 7 6 (TV ) T (t) 9 / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units VT9..-6AS Tripping characteristics 5 t [s] 5 5 5.5...5.. I n = 5 A I n = A I n = 6 A min. L I r S t v [ms] max. x Ir 5 x Ir NSO_59...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 In = 6 A In = A t r [s] In = 5 A I TV Trip units ETU DPN-distribution protection with protected N pole F protecting lines and transfmers in TN-C-S and TN-S netwks The VT9..-6BC trip unit is only intended f the VT 76-AA56-AA switching unit. The operation of the trip unit is controlled by a microprocess. The trip unit is equipped with a thermal memy that can be disabled by turning a switch on the front panel from position T (t) to position T (). After disabling of the thermal memy, the thermal trip unit remains active. The rated current I r, delay f switching off the trip unit at 7. I r, and the tripping level of the sht-circuit trip unit can be adjusted. The operational state is signalled by an LED indicat 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 befe tripping. Located on the lower part of the trip unit cover are two photocells f communicating with the signalling 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 OFF position. Tripping characteristics 5 t [s] 5 5 5.5...5 I N N IN =.5 x Ir L.75 x Ir I n = 5 A I n = A I n = 6 A x Ir min. I r max. x Ir x Ir NSO_6.....5 5 5 x I n I N I r t r I n I i I i 7 x Ir I N 9 x Ir I r In = 6 A t r [S] In = A t r I In = 5 A I i Siemens LV 6 /
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Trip units Adjustable specifications Order No. Rated current I n Overload protection I r t r (7. x I r ) Restart Instantaneous sht circuit protection I i A A S ka ms,5 5 T () 5 7,75 6 VT9 5-6BC 5 7 8 9 7 T (t) 9 OFF 5 6 7,5 8 T () 9,75 VT9-6BC 5 7 75 T (t) 9 5 5 9 OFF 6 5 6,5 75 T () 9 5 5,75 5 VT9 6-6BC 6 6 5 7 55 T (t) 8 5 55 9 OFF 575 6 / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Auxiliary switches Overview Order number accding to contact arrangement Arrangement Order No. Number of contacts Contact types of contacts VT9 -AC () NO VT9 -AE () NO VT9 -AD () NC VT9 -AG () NC VT9 -AF () + NC + NO VT9 -AH () NC + NO Functions and names of switches accding to their location in accessy compartments Accessy Switch name Switch function compartment Signalling Signal to indicate the state of the circuit breaker by the trip unit Relative Relative to indicate tripping of the circuit breaker by trip units, TEST pushbutton by OFF pushbutton on the motized operating mechanism,, 5, (6... 9) ) Auxiliary Auxiliary to indicate the position of the main contacts Leading Leading to make/break in advance of the main contacts ) Accessy compartments 6... 9 f -pole version only. Siemens LV 6 /5
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Auxiliary switches Siemens AG Function State of switches located in the switching unit accessy compartment Switches early contact signal relative auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary auxiliary.y.y.y VT9 -AJ.Y acc.c. no.. VT9 -AC..... VT9 -AD VT9 -AH. acc.c. no..... VT9 -AC VT9 -AD VT9 -AH....... VT9 -AC VT9 -AD VT9 -AH... acc.c. no. acc.c. no..... VT9 -AC VT9 -AD VT9 -AH... acc.c. no. 5. 5. 5. 5. VT9 -AC VT9 -AD VT9 -AH 5. 5. 5. acc.c. no. 5.. VT9 -AG.... VT9 -AF.... VT9 -AE.. acc.c. no. + 6. 6. 6. 6. VT9 -AC VT9 -AD VT9 -AH 6. 6. 6. acc.c. no. 6 7. 7. 7. 7. VT9 -AC VT9 -AD VT9 -AH 7. 7. 7. 8. 8. 8. 8. VT9 -AC VT9 -AD VT9 -AH 8. 8. 8. 9. 9. 9. 9. VT9 -AC VT9 -AD VT9 -AH 9. 9. 9. acc.c. no. 7 acc.c. no. 8 acc.c. no. 9 NSO_6 Technical specifications 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- --.....5 A/5V -- -- -- AC-5 6A/V,A/V, -- A/AC 5 V.5 A/AC 5 V -- A/5 V DC- --.....5 A/5V -- --. A/DC 6 V DC-. A/ V,. A/ V,...../6 V --. A/DC 5 V --. A/5 V Thermal current I th A.5 -- 6.5 Arrangement of contacts,,,,,, Connect cross-section S mm.5... Terminal protection IP (connected switch) ) VT9 -A. is not suitable f controlling electromagnetic loads. /6 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Auxiliary trip units Overview Order number of shunt trip units accding to the rated operating voltage U e AC/DC,, 8 V AC/DC V AC,, 5 V/DC Order No. VT9 -SC VT9 -SD VT9 -SE Order number of undervoltage trip units accding to the rated operating voltage U e AC, 8 V AC/DC V AC,,5/DC V Order No. VT9 -SC VT9 -SD VT9 -SE The particular rated operating voltage of the trip unit is set up by jumpers located in the trip unit. Default setting is always the maximum value. Function Shunt trip units Circuit breaker switched off by the shunt trip unit Circuit breaker states and lever positions of the circuit breaker 6 5... 5... 5 5... 5... Main contacts Auxiliary switch Auxiliary switch Relative switch NSO_6 accessy compartment 5 Circuit breaker state Switched on Switched off by trip units, by TEST button by the tripping pushbutton located on the operating mechanism Switched off manually electrically by operating mechanism L+ Lever positions of circuit breakers.... Relative switch t [ms] accessy compartment B U B VT9 -S. NSO_58 N- Siemens LV 6 /7
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Auxiliary trip units Siemens AG Undervoltage trip units Circuit breaker switched off by the undervoltage trip unit Circuit breaker states and lever positions of the circuit breaker 6 5... 5... 5 5... 5....... Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch Early switch accessy compartment NSO_65 accessy compartment 5 Circuit breaker state Switched on Switched off by trip units, by TEST button by the trip pushbutton on the motized operating mechanism Switched off manually electrically by operating mechanism Arrangement, number and type of contacts Lever positions of circuit breakers Arrangement of contacts Number of contacts Contact types NC + NC + NO NONO L+ L+.Y.Y.Y.Y.Y.Y.Y.Y Early switch t [ms] accessy compartment N- A A U< VT9 -U. A.Y U< A.Y N- VT9 -U. NSO_59 Technical specifications Shunt trip units Order No. Rated operating voltage U e VT9 -S. AC,, 8,,,, 5 V DC,, 8,, V Rated frequency f n Hz 5/6 Input power at. U e AC DC <VA <W Functional description U,7 U e the circuit breaker must trip Time to switch-off ms Continuous load Yes Connect cross-section S mm.5... Terminal protection IP (connected trip unit) Location in accessy compartment No. Undervoltage trip units Order No. VT9 -U. VT9 -U. ) Rated operating voltage U e AC,, 8,,,, 5 V DC,, 8,, V Rated frequency f n Hz 5/6 Input power at. U e AC DC <VA <W <VA <W Functional description U.85 U e (circuit breaker can switch on) U.5 U e (the circuit breaker must trip) Time to switched-off ms Continuous load Yes Connect cross-section S mm.5... ) Terminal protection IP (connected trip) Location in accessy compartment No. Earl switch -- 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/AC 5 Arrangement of contacts --,, Connect cross-section S mm --.5... ) Terminal protection (connected trip unit) -- IP ) Cannot be used in combination with motized operating mechanism VT9 -M... /8 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Rotary operating mechanisms Overview Rotary operating mechanism The following components of the rotary operating mechanisms are required: To switch the switching unit: - VT9 -HE VT9 -HE black knob - VT9 -HF red knob To switch the switching unit through the switchgear cabinet do: - VT9 -HJ..extension shaft - VT9 -HG/HH.. coupling driver f do-coupling operating mechanism - VT9 -HE/HF.. knob Design Fig. : Rotary operating mechanism with knob Fig. : Rotary operating mechanism with extension shaft, coupling driver and knob The rotary operating mechanism makes it possible to actuate the circuit breaker by turning a knob, e.g. in der to switch machines on and off. The modular concept of the operating mechanisms makes allows simple mounting on the switching unit after the accessy compartment cover is removed. The operating mechanism and its accessies must be dered separately (see page /6). The rotary operating mechanism is fixed right on the switching unit of the circuit breaker. The rotary operating mechanism coupling driver is fixed onto the switchgear do and it provides protection IP IP66. The rotary operating mechanism knob is placed on the rotary operated mechanism unit on the rotary operating mechanism coupling driver The extension shaft is available in two versions, standard (length 65 mm - can be shtened) and telescopic (adjustable length 5... mm). Mechanical interlocks and mechanical interlock f parallel switching Mechanical interlocks f fixed-mounted versions require the following components: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob Mechanical interlocking with Bowden wire is intended f fixed-mounted, plug-in and withdrawable versions Mechanical interlocking with Bowden wire requires the following components: - x VT9 -HA/HB.. rotary operating mechanism - x VT9 -HE/HF.. knob The rotary operating mechanism makes it possible to actuate the circuit breaker: Operation from the front panel of the circuit breaker (Fig. ) VT9 -HA/HB.. rotary operating mechanism + VT9 -HE/HF.. knob Operation through the switchgear cabinet do (Fig. ) VT9 -HA/HB.. rotary operating mechanism + VT9 -HJ.. extension shaft + VT9 -HE/HF.. knob + VT9 -HG/HH.. coupling driver Operation through side wall of switchgear cabinet VT9 -HC/HD.. rotary operating mechanism + VT9 -HJ.. extension shaft + VT9 -HE/HF.. knob + VT9 -HG/HH.. coupling driver Enhanced safety f operat: The rotary operating mechanism and knob allow operats to lock the circuit breaker in position switched off manually. The unit and knob of the rotary operating mechanism can be locked by three padlocks with a shank diameter up to 6 mm Each coupling driver f do-coupling operating mechanism prevents the cabinet do from being opened when the circuit breaker is in on-state after tripping. Types VT9-HG and VT9-HG prevent the cabinet do from being opened when the circuit breaker is in the state "switched off manually" and when the rotary operating mechanism knob is locked out. Two circuit breakers with rotary operating mechanisms can be provided with mechanical interlocking with parallel mechanical switching (see page /). Siemens LV 6 /9
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Rotary operating mechanisms Features Siemens AG Order No. Description Col Permits operat to Degree of lock the circuit breaker in OFF protection mode Switchgear cabinet do is locked when circuit breaker is switched on switched off manually and locked Length in mm VT9 -HA Rotary operating mechanism grey no -- -- -- -- VT9 -HA Rotary operating mechanism grey yes -- -- -- -- VT9 -HB Rotary operating mechanism yellow yes -- -- -- -- VT9 -HC Rotary operating mechanism grey no -- -- -- -- VT9 -HD Rotary operating mechanism grey no -- -- -- -- 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, can be shtened -- -- -- -- -- 65 VT9 -HJ Extension shaft, telescopic -- -- -- -- -- 5... / Siemens LV 6
RP-BD-CK PS PS PS SP SV RP-BD-CK PS PS PS SP SV RP-BD-CK Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mechanical interlocking and parallel switching Function VT9-8LA mechanical interlocking VT9-8LB mechanical parallel switching Mechanical interlocks make sure that two circuit breakers cannot trip simultaneously, but always just individually. Both circuit breakers may be switched off simultaneously. Interlocking can be used between two VT circuit breakers between one VT and one VT circuit breaker. Both circuit breakers must be furnished with rotary operating mechanisms (at least one of them with a rotary operating mechanism and knob). When using a mechanical interlock it is required to comply with the dimensions shown in the figure and in the table. Mechanical interlocks f parallel switching are f simultaneous switching of two circuit breakers. Parallel switching can be used between two VT circuit breakers between VT and VT circuit breakers. Each circuit breaker must be furnished with a rotary operating mechanism and at least one of them with a knob. When using a mechanical interlock f parallel switching it is required to comply with the dimensions shown in the figure and in the table. 5 L PS PS PS X TEST X TEST 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 6.5 +7.5 +7 6.5 +7.5 +7 6.5 +7 x x VT, P 5 +7 6.5 +7.5 +7 6.5 +7.5 +7 6.5 +7 x x VT, P.5 +7 6.5 +7 +7 6.5 +7 +7 6.5 +7 x x VT, P.5 +7 6.5 +7 +7 6.5 +7 +7 6.5 +7 x x ) Switching unit VT, P (-pole version) must be located on the right side. TEST TEST NSO_5 Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mechanical interlocking and parallel switching Siemens AG VT9-8LC. Mechanical interlocking Provides mechanical interlocking of two circuit breakers/switch-disconnects so that they cannot both trip simultaneously, but only one of them at a time. Both circuit breakers may be turned off simultaneously. VT9-8LC mechanical interlocking is intended f two VT circuit breakers. VT9-8LC interlocking is intended f one BH6 circuit breaker and one VT. Circuit breakers may be in fixed, plug-in and withdrawable designs. Order No. of mechanical VT9-8LC VT9-8LC interlocking Circuit breaker types VT VT VT VT Circuit breaker installation in switchgear and controlgear assemblies Detailed infmation is included in the "Instructions f use", which is available on our website: www.siemens.com/technical assistance. NSO_66 min R = 5 8 ON OFF... 7 ON OFF TEST TEST min. 8 / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Motized operating mechanism Design The motized operating mechanism is equipped with spring stage units. The energy sted in the springs makes it possible to switch the circuit breaker on in less than 6 ms. Releasing the spring energy stage unit and tripping the circuit breaker is ensured by a closing coil. The mot mechanism can trip the circuit breaker in 9 ms. This method of tripping is suitable f most technological applications. When faster circuit breaker tripping is required (e.g., because an emergency STOP button was pressed), it is possible to use the mechanism in combination with an undervoltage trip unit a shunt trip unit. The motized operating mechanism front panel contains a select switch f selecting the drive modes. There is also the possibility to remotely indicate the select switch state. - The first mode is automatic remote control (select switch in position AUTO). This is the standard position in automatic operation. - The second mode is manual control (select switch position MANUAL). The motized operating mechanism does not need any voltage to perfm its function. Remote switching on and off in position AUTO is carried out with pushbuttons that must be connected to the drive unit connect. Furtherme, this position makes it is possible to control the circuit breaker with the pushbuttons located on the drive unit front panel. In MANUAL mode it is possible to switch on and off with the green and red pushbuttons located on the front panel of the motized operating mechanism cover. The function of the remote control ON button in MANUAL mode is locked out, whereas the function of the remote control OFF button remains active f safety reasons. The motized operating mechanism, as opposed to the circuit breaker, recognizes only two fixed positions. In the first position the circuit breaker is ON. When the circuit breaker is tripped in AUTO mode by the trip unit shunt/undervoltage trip units, then because of mechanical link between the circuit breaker and the mot mechanism, a pulse will be generated to automatically wind up the spring of the stage unit. The mot mechanism can be wound up automatically by permanent closing switch S. In the second fixed position the circuit breaker is switched off and the loaded drive is ready to switch the breaker on after it has received the setting pulse. The motized 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 stage unit by repeated rotation of the foldable handle. After charging the spring mechanism with spring energy, it is possible to switch the circuit breaker on and off with the control buttons located on the front panel of the mot mechanism. The front panel incpates a stage unit status indicat to indicate what state the VT mot mechanism unit stage is in and whether it is possible to switch the circuit breaker on. The VT mot mechanism is also able to remotely indicate the stage status. A cresponding signal is issued to the terminal strip. VT mot mechanism have optional designs, alternatively with MANUAL/AUTO indication. The motized operating mechanism can be furnished with an electromechanical operations counter that may be installed in the drive cover outside of the circuit breaker (e.g. in the switchgear do). A metal holder included in the scope of supply of the external operations counter. Connecting is facilitated with connects. The motized operating mechanism can be locked in off position using as many as three padlocks with shank diameter max.. mm. A VT9 -MF cover can be attached to the ON-OFF switch of the motized operating mechanism, and then sealed with sealing wire. The cover prevents turning on the circuit breaker from the drive panel. Extension cable VT9 -MF has a connect on one side that connects to the connect located on the mot mechanism and conducts on the other side that connect, f example, to a terminal block. Order No. VT9 -S. Operational voltage U e AC V DC V,8,,, 8,, Rated frequency f n Hz 5/6 Control pulse length f sting ms ) Control pulse length f switching on ms...7 ) f switching off ms... ) Time befe switching on ms <6 Time befe switching off ms 9 Frequency of cycles ON/OFF contact making/min Frequency of cycles - instant successive contact making ON/OFF cycles Mechanical endurance contact making Input power AC VA DC W Protection 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.5 A/5 Order No. VT9 -MF Number of conducts Conduct cross sections S mm.5 Conduct lengths cm 6 ) F sequence of control pulses, see page /. Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Motized operating mechanism Siemens AG Function Circuit breaker switched on/off by the motized operating mechanism Circuit breaker switched on by the motized operating mechanism electrically by pushbutton ON Circuit breaker switched off by the motized operating mechanism- electrically by pushbutton OFF 6 5 Main contacts 5 Auxiliary switch NSO_68 6 5 Main contacts Auxiliary switch 9 NSO_69 5... 5... 5... 5....... 5 5 Auxiliary switch Relative switch Relative switch Early switch accessy compartment 5 accessy compartment 5... 5... 5... 5....... Auxiliary switch Relative switch Relative switch Early switch 9 9 accessy compartment 5 accessy compartment.y.y.y.y.y.y.y.y Early switch t [ms] accessy compartment.y.y.y.y.y.y.y.y Early switch 9 9 t [ms] accessy compartment Circuit breaker states and toggle positions of the circuit breaker Wiring diagram Mot drive control circuits Q L+ ON B OFF Mot drive S Circuit breaker state Switched on Switched off by trip units, by TEST button by the trip pushbutton on the motized operating mechanism Switched off manually electrically by the operating mechanism Wiring diagram description Toggle positions of circuit breaker X NC NO NO S6 NC C C S5 MP X 9 7 8 6 M PE N- YC 5 P X Operations counter NSO_7 Symbol MP M P X X S5 S6 YC B ON OFF S Q Description Motized operating mechanism VT9 -M.. Mot Energy stage device Connect to connect control circuits Connect f external operations counter Switch indicating AUTO/MANUAL modes Switching indicating energy stage (ready to on: NO-C) External operations counter VT9 -MF recommended wiring of the control circuits (not included in delivery) Make pushbutton Break pushbutton Switch f energy stage (switched on = automatic stage, may be continuously switched on) Circuit breaker f motized operating mechanism / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Motized operating mechanism Tripping of the circuit breaker with a motized operating mechanism by the trip unit (switch S automatic spring charging) 6 5............ Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch Early switch Early switch 65 65 Tripping of the circuit breaker with motized operating mechanism by a shunt trip unit undercurrent trip unit (switch S automatic spring charging) 65 65 t [ms] accessy compartment accessy compartment accessy compartment NSO_57 Wiring diagram Circuit breaker switched on by motized operating mechanism (electrical ON signal) and switched off by the shunt trip unit Control circuit L+ B X NC MP X Q Mot drive NO S6 C NC OFF 9 7 NO S5 C ON S A 8 6 X J acc.c. no. PE N- YC N- Operations counter 5 A VT9 -U. B M P U< U B Circuit breaker switched on by motized operating mechanism (electrical ON signal) and switched off by undervoltage trip unit VT9 -S. NSO_7 6 5........ Main contacts Auxiliary switch Auxiliary switch Relative switch Relative switch 5 5 t [ms] accessy compartment accessy compartment NSO_ Mot drive control circuits Q L+ ON S B OFF Mot drive X 9 7 5 NC NO NC NO S6 S5 C C A B SP-BHD-X... SV-BHD-X... M P U< U MP X 8 6 PE N- X YC Operations counter A J N- B acc.c. NSO_7 Siemens LV 6 /5
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Motized operating mechanism Siemens AG Recommended actuating pulses Circuit breaker switched on/off by motized operating mechanism - switch S permanently closed (automatic spring charging) open HK RS 5 R OFF > > 88 7 IMP ON t [ms] Circuit breaker switched off by trip unit shunt/undervoltage trip units and switched on by the motized operating mechanism - switch S permanently closed (automatic spring charging) HK 5 5 NSO_6 Description of charts Symbol HK PS RS R OFF IMP S IMP ON IMP OFF 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 closes instantly, by trip unit Pulse to charge spring mechanism Make pulse f motized operating mechanism Break pulse f motized operating mechanism Random segment of time Switched off by trip units, by TEST button by the trip pushbutton on the motized operating mechanism Switched off manually electrically by the operating mechanism lever positions of circuit breakers RS 5 R OFF > > 88 7 IMP ON t [ms] NSO_6 Circuit breaker switched off by trip unit shunt/undervoltage trip units and switched on by motized operating mechanism - switch S closed only f sting 5 HK RS X + 5 > 88 X > IMP S R OFF > 7 IMP ON t [ms] NSO_7 /6 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Motized operating mechanism Use of VT9 -M.. motized operating mechanism in the automatic standby system Wiring diagram of the motized operating mechanism of the circuit breaker Recommended control pulses f switching the VT circuit breakers by the motized operating mechanism after Circuit breaker was switched off by a shunt trip unit by an undervoltage trip unit in the automatic standby system Control circuit L+ B Q ON OFF S HK > 5 7 IMP ON NSO_8 Mot drive X 9 7 NC NO NC NO S6 S5 C C 5 A B VT9 -U. VT9 -S. M P U< U RS SV SP 5 > 88 t [ms] MP X Symbol M P X X S5 YC B ON OFF S Q 8 6 PE N- X YC Cycle counter Description Mot Energy stage device Connect f connection of control circuits Connect f 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 mot drive supply) Pushbutton Pushbutton Switch f stage (closed = automatic stage; it can be closed permanently) Circuit breaker f motized operating mechanism In a standby system, if a Bowden cable is used f mechanical interlocking, then an auxiliary trip unit should be used to switch the circuit breaker off. Otherwise, the first attempt of switching a standby circuit breaker may fail. A J N- B acc.c. NSO_79 HK RS SV SP Symbol HK RS SV SP IMP ON IMP OFF IMP S X > X + 5 > 88 > > 7 IMP ON 5 t [ms] Description Main contacts Relative switch Pulse f shunt trip unit Pulse f undervoltage trip unit Motized operating mechanism make pulse Motized operating mechanism stage pulse (generated by S switch) Switched on Switched off by trip units, TEST REVISION pushbutton NSO_8 Switched off manually by motized operating mechanism electrically (wound up state) Siemens LV 6 /7
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mounting accessies f plug-in version Overview Plug-in bases Position signalling VT9 -WL position signalling switch VT9 -PA Locking plug-in base against plug-in base inserting the circuit breaker/disconnect The plug-in version of the circuit breaker/switch disconnect is intended f demanding industrial applications where rapid exchange of the circuit breaker is needed. The plug-in base includes complete accessies f assembling circuit breaker/switch-disconnect in plug-in design from the iginal fixed-mounted version The components of the plug-in base are: - suppting part of the plug-in base - connection sets (total of 6 terminals) f fitting on to the switching unit - interlocking connecting rod (ensures automatic switching off of the circuit breaker f handling inserting and removal) - set of mounting bolts f securing circuit breaker into plug-in base (to secure plug-in base into switchboard, a set of mounting bolts is used that is included in delivery of the VT 76-.AA6-AA switching unit Main circuit The VT9 -TA connecting set is used f connecting with busbars cable lugs and is included in the scope of supply of the VT of switching unit, pole f connecting in another way, it is necessary to use connecting sets (see page /9) connections must comply with our recommendations (see page /). Auxiliary circuits These are connected using a 5-wire VT9 -PL cable. Coding VT9 -WN coding set The plug-in base may be provided with a maximum of four switches (f -pole version, max. 6 switches) f signalling the connected/removed position. States of VT9 -WL switches in plug-in base accding to the circuit breaker position Accessy compartment,,, (9, ) ) Circuit breaker position Inserted Removed = contact open, = contact closed ) Accessy compartments 9 and are f -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/AC V DC-5.5 A/5 V, A/5 V, A/ V Thermal current I th A 6 Arrangement of contacts Connect cross-section S mm.5... Terminal protection IP (connected switch) A wiring diagram showing the circuit breaker situated in a plugin mounting base and outfitted with accessies, is shown on page /. Plug-in base with motized operating mechanism The plug-in base and the circuit breaker can be provided with a coding set, which prevents inserting any other circuit breaker into the plug-in base. Circuit breaker in plug-in version with motized operating mechanism /8 Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mounting accessies f plug-in version Recommended wiring of the circuit breaker in plug-in design with motized operating mechanism L+ Mot drive control circuits Q Symbol MP M P X Description VT9 -M.. motized operating mechanism Mot Energy stage device Terminal strip to connect control circuits B OFF ON S X S5 S6 YC Terminal strip f external operations counter Switch indicating AUTO (NO-C)/MANUAL (NC-C) modes Switch to indicate full stage (ready to switch on: NO-C) External operations counter VT9 -MF Mot drive B Recommended wiring of the control circuits (control circuits not included in motized operating mechanism delivery) ON Make pushbutton X 9 7 5 OFF S Break pushbutton Switch to ste energy NC S6 NO NC C S5 NO C M P Q Circuit breaker f motized operating mechanism AC V LSN C/ AC 8V LSN C/ AC V LSN C/ AC V LSN C/ DC V LSN-DC C/ DC 8V LSN-DC C/ DC V LSN-DC C/ DC V LSN-DC C/ MP X 8 6 PE N- X YC Operating counter NSO_5 Unplugging the circuit breaker with motized operating mechanism Each time befe removing the circuit breaker, we recommend turning first of all the AUTO/MANUAL switch on the motized operating mechanism to the MANUAL position Me operating infmation is available in the operating instructions Not adhering to this procedure failing to follow the recommended wiring, could mean that the circuit breaker will not successfully switch on at the first attempt. Siemens LV 6 /9
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mounting accessies f plug-in version Changes in states of switches when inserting and withdrawing the circuit breaker State of circuit breaker befe removing Siemens AG State of switches befe removing inserted position State of switches after removing withdrawn position Accessy compartment,, 5 (6... 9) ),, 5 (6... 9) ) Lever position of the circuit breaker State of the main contacts VT9 -AC VT9 -AH Switched on Manually switched off switched off by motized operating mechanism VT9 -AC VT9 -AH VT9 -AC VT9 -AH Switched off by trip units - VT9 -AC VT9 -AH VT9 -AC - VT9 -AH VT9 -AC VT9 -AH Switched off from switched-on state: by means of auxiliary trip unit, TEST pushbutton by OFF pushbutton located on the motized operating mechanism = contact open, = contact closed ) Accessy compartments, 5, 6 are f -pole version only. / Siemens LV 6
Siemens AG VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mounting accessies f withdrawable version Design Withdrawable version mounting base Position signalling VT9 -WL position signalling switch Circuit breaker installed VT9 -WA in withdrawable version base withdrawable version base The withdrawable version of the circuit breaker/switch-disconnect is intended f demanding industrial applications where rapid exchange of the circuit breaker and frequent checking of the circuit are needed. The withdrawable version base includes all parts needed to convert a circuit breaker switch disconnect from fixedmounted version to withdrawable version. The components of the withdrawable version are: - withdrawable version base - movable side plates - connection sets (total of 6 terminals) f fitting onto the switching unit - interlocking connecting rod (ensures automatic switching off of the circuit breaker when handling, inserting and withdrawing) - a set of mounting bolts needed to fasten the withdrawable version mounting base into the switchboard Main circuit The VT9 -TA connecting set is used f connecting with busbars cable lugs and is included in delivery of the VT 76-.AA6-AA switching unit F 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 version mounting base and the circuit breaker can be provided with coding set, which prevents inserting another circuit breaker into the withdrawable version mounting base. The withdrawable version can be provided with switches f signalling the position of the circuit breaker, see table. 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/AC V DC-5.5 A/DC 5 V, A/DC 5 V, A/DC V Thermal current I th A 6 Arrangement of contacts Connect cross-section S mm.5... Terminal protection IP (connected switch) F wiring diagram of the circuit breaker in withdrawable device with accessies, see page /. States of VT9 -WL switches in withdrawable version accding to circuit breaker and lockout positions State of switch Circuit breaker and lockout position Accessy compartment... 5,7 6, 8 (9, ) ) (9, ) ) Inserted and unlocked Withdrawn and unlocked Removed and unlocked = contact open, = contact closed ) Accessy compartments 9 and are f -pole version only. Operating state is always in locked-out position In locked-out position, it is possible to lock the withdrawable device, so that the circuit breaker cannot be switched on (f me detailed infmation, see Advantages and enhanced safety f operat ). Siemens LV 6 /
VT Molded Case Circuit Breakers up to 6 A Technical Infmation - Accessies and Components Mounting accessies f withdrawable version Locking Siemens AG Wiring diagram description Locking the circuit breaker Locking the withdrawable version in withdrawable version base against inserting the circuit base against tampering breaker Withdrawable version with motized operating mechanism Symbol MP M P X X S5 S6 YC B ON OFF S Q Description VT9 -M.. motized operating mechanism Mot Energy stage device Terminal strip to connect control circuits Terminal strip f external operations counter Switch indicating AUTO (NO-C)/MANUAL (NC-C) modes Switch to indicate full stage (ready to switch on: NO-C) External operations counter VT9 -MF Recommended wiring of the control circuits (control circuits not included in motized operating mechanism delivery) Make pushbutton Break pushbutton Switch to charge spring mechanism Circuit breaker f motized operating mechanism 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/ Recommended wiring of the circuit breaker in withdrawable version with motized operating mechanism L+ B Mot drive control circuits Q OFF ON S Inserting and withdrawing the circuit breaker with motized operating mechanism Each time befe inserting withdrawing the circuit breaker, we recommend placing the AUTO/MANUAL switch on the motized operating mechanism to MANUAL position Me operating infmation is available in the operating instructions Not adhering to this procedure failing to follow the recommended wiring could mean that the circuit breaker will not successfully turn on at the first attempt. Mot drive X 9 7 5 NC S6 NO NC C S5 NO C M P MP X 8 6 X PE N- YC Operating counter NSO_5 / Siemens LV 6