Power protection solutions

Transcription

1 Power protection solutions DMX A.C.Bs UP TO 4000 A

2 In high power installations, the role of the main enclosure is to: - House protection devices and provide for their connection - Provide management and coupling of supplies - Divide the main circuits. These functions whose definitions are simple but which are of major importance with respect to the need for reliability and continuity of operation. Because it must include the control of all these components, Legrand s answer today for power distribution boards up to 4000 A is logically based on the three essential elements which make up the head of a low voltage installation: - XL 3 enclosures with their recognized qualities of robustness and adaptability - Busbar systems and supports for 5 and 10 mm thick bars tested up to ka - The DMX air circuit breakers from 800 to 4000 A in fixed, draw-out and interlocking versions.

3 Contents Technical part DMX air circuit breakers 2 CHOICE of XL 3 enclosure 22 BUSBARS up to 4000 A 28 MOUNTING DMX devices 36 Offer part DMX 40 1

4 DMX air circuit breakers DMX circuit breakers and isolating switches provide control and protection at the head of low voltage distribution installations up to 4000 A. Find the complete offer on page 40 2

5 DMX AIR CIRCUIT BREAKERS The technology of the air circuit breaker has improved considerably: in fact breaking does not really take place in the open air anymore, but in sophisticated arcing chambers, and the equipment has become a great deal smaller. At the same time, their specific characteristics (electrical and mechanical strength, breaking capacity, maintainability, optional accessories, etc) have also been developed. The Legrand DMX units have evolved in line with these general developments. They are used to protect the most powerful installations. Their ease of installation and clarity of layout have been particularly carefully studied. All devices in the DMX range are mounted behind the same front panel and have same depth and height. A 4000 A system within your reach DMX Fixed or draw-out Circuit breaker with MP17 integrated electronic protection unit. OPTION MP20 electronic protection unit with advanced functions. INTEGRATION Clear, easy mounting All DMX have the same front panel, and are the same depth and height. CONNECTION AND IDENTIFICATION OF AUXILIARIES On front panel terminal block 32 connection points available Identification on front panel Accessories attached via front panel for extremely easy installation. CONTROL AND SIGNALLING AUXILIARIES Shunt release Undervoltage release Motor operators Closing release Signalling contacts Locking options 3

6 DMX air circuit breakers (continued) THE DMX RANGE DMX circuit breakers and switches are available in just two frame sizes: - DMX and DMX-I 0 (800, 1, 1600, 2000 and 0 A ratings) - DMX and DMX-I 4000 (3200 and 4000 A ratings). The designation DMX corresponds to a standard breaking capacity of 50 ka (1) while DMX-H offers a breaking capacity of 65 ka (1),and DMX-L a breaking capacity of 100 ka (1). With the DMX-L, the size of the devices is identical to that of the DMX 4000 for all ratings from 800 to 4000 A. (1) (at 415 V±) DMX 0 fixed version DMX 0 draw-out version DMX 4000 draw-out version One catalogue number = one complete product All breakers are delivered as standard with: - MP17 electronic trip unit - 8 Auxiliary contacts 5NO+3NC - Rear connection - Auxiliary terminal block - Padlocking shroud for ON and OFF buttons - Panel door seal For draw-out, the following features are delivered as standard as well: All DMX, both circuit breakers and isolating switches, are available in fixed and draw-out version. In comparison with the fixed version, the draw-out version has additional locking facilities, optimum safety when work is being carried out on them and on the installation (padlocking and physical separation of the installation) and is easily interchangeable (no disconnection to be carried out). - Lockable safety shutters - Racking handle - Adjustable rear terminals 4

7 TECHNICAL PART Retractable handles are used to draw out the device Safety shutters provide protection against the risk of contact with live parts, as standard on every DMX External Memory Unit The design of the DMX contributes considerably to their strength and maintainability. Removing the front panel gives direct access to all the control and signalling auxiliaries: trips, coils, contacts, motorisation, counter, etc. If a device is changed, the external memory unit (EMU) retains the settings and all the data recorded during the operation of the breaker which was previously installed (faults, operations, currents, etc). This function makes safe maintenance and reduces downtime to a minimum. The settings are thus not associated with the device anymore, but with the circuit which is being protected. 5

8 DMX air circuit breakers (continued) ELECTRONIC TRIP UNITS In addition to the integration capabilities of these circuit breakers, their easy mounting and connection, strength and the maximum continuity of operation they provide, they also have modern electronic protection units which enable very precise setting of protection conditions while maintaining total discrimination with downstream breakers. MP17 electronic protection unit DMX circuit breakers are equipped with the MP17 electronic protection unit as standard. The settings are adjusted using rotary selector switches: - Long time delay protection against overloads: Ir from 0.4 to 1 x In (7 steps) - Short time delay protection against short circuits: Im from 2 to 12 x Ir (7 steps) - Short time delay protection operation time: Tm from 0 to 1 s (7 steps) The protection unit is adjusted using rotary selector switches and therefore independently of the power supply of the device. The MP17 protection unit also has instantaneous protection against very high intensity short-circuits. MP17 protection unit on draw-out DMX 0 t (s) Ir Ir setting Reset button Im Im and Tm settings Tripping curve Tm LED indicating correct operation I (A) Test connector and portable external power supply 6

9 10000 t(s) 1000 Tripping curve for electronic protection unit MP17 Adjustement of Ir, Im, Tm on front face Ir I t (A s) 10 9 Thermal stress limitation curve for electronic protection unit MP17 TECHNICAL PART Im Tm I/Ir If ka Ik (A) Long delay protection against overloads Ir = 0,4-0,5-0,6-0,7-0,8-0,9-1 x In (7 steps) Neutral protection at 50% of the value of phases Short delay protection against short-circuits Im = x Ir (7 steps) Tm = instantaneous -0,1-0,2-0,4-0,6-0,8-1,0 s (7 steps) Instantaneous protection If = 50 ka for DMX 65 ka for DMX-H 80 ka for DMX-L 7

10 DMX air circuit breakers (continued) ELECTRONIC TRIP UNITS (CONTINUED) MP20 electronic protection unit On request, DMX circuit breakers can be fitted with MP20 electronic protection units which have advanced functions. The settings are adjusted via a touch sensitive keypad with the setting point displayed on an illuminated curve. Numbers of operations, maintenance indicator, fault history, load shedding parameters (early warning, load control) and current values can be displayed. Modbus or Profibus communication and control functions are also available. Every MP20 is equipped with EMU. Possible settings: - Long time delay protection against overloads: Ir from 0.4 to 1.0 x In (60 steps) - Long time delay protection operation time: tr from 0.25 to 35 s (16 steps) - Delayed protection against short circuits: Imr from 1.5 to 12 x Ir (8 steps) - Delayed protection operation time: tmr from 1 to 10 s (tr function) - Short delay protection against short circuits: Im from 1.5 to 12 x Ir (8 steps) - Short delay protection operation time: tm from 0 to 1 s (10 steps) - Instantaneous protection against very high short circuits t (s) Liquid crystal display Alarm indicator Ir Correct operation indicator Tripping curve with display tr Imr tmr Im tm I (A) Reset button (manual or auto) Tripping curve for earth fault with display Touch-sensitive keypad Test connector and portable external power supply MP20 control & protection unit on DMX 4000 circuit breaker 8

11 Tripping curve for electronic protection unit MP20 Adjustement of Ir, Imr, Tmr, Im, Tm t(s) Ir I t (A s) Thermal stress limitation curve for electronic protection unit MP20 TECHNICAL PAR(T Tr Imr Tmr Im Tm ka I/Ir If Long delay protection against overloads Ir = 0,4 to 1,0 In (by steps of 0,01) Tr =,025 to 35 s at 7,2 x Ir (16 steps) Ik (A) Delayed protection against short-circuits Imr = 1, x Ir Tmr = fixed according to Tr Short delay protection against short-circuits Im = 1, x Ir Tm = instantaneous -0,1-0,2-0,3-0,4-0,5-0,6-0,7-0,8-0,9-1,0 s Instantaneous protection If = 50 ka for DMX 65 ka for DMX-H 80 ka for DMX-L Protection against earth fault : On request, the MP17 & MP20 protection units can be equipped with protection against earth faults. The level of the earth fault current is adjustable from 0 to 1.0 x In in 6 steps on MP17 protection units and 10 steps on MP20. The time delay on tripping is adjustable from 0 to 1s. MP20 units also have a I 2 t = constant function for eliminating the unwanted section of the protection curve. This function can be deactivated at any time. 9

12 DMX air circuit breakers (continued) Front panel of draw-out DMX circuit breakers External memory unit (EMU) Electronic protection unit MP20 Protective cover with security of access to settings Identification of the type DMX: grey DMX-H: yellow DMX-L: red Space for a lock (device open) Device position indication Plugged-in: red Test: yellow Drawn-out: greeen Padlocking in drawn-out position ( 2 padlocks) Isolator terminal blocks for auxiliary circuits Windows for displaying auxiliary equipment Spring loading lever (stored energy control) Circuit breaker: black lever Switch: grey lever Padlockable close control button Padlockable open control button Indicator showing the position of the main contacts Indicator showing the load status of the springs Housing for the extraction handle (This housing can be fitted with a lock in drawn-out position) Independent padlocking of the isolating shutters Lockable aperture for insertion of the extraction handle Safety device for insertion of the extraction handle 10

13 CONTROL ACCESSORIES Shunt trips Shunt trips are devices used for the remote instantaneous opening of the device. They are generally controlled with an N/O type contact. These devices are available in AC and DC versions, with various supply voltages. They are simply clipped on to the front panel of the device. No tool required. An auxiliary contact is connected in series with the coil, cutting off its power supply when the main poles are open. Nominal voltage Un : 48 V=, 110/130 V±/=, 220/ V±/=, 380/440 V± Tolerance on nominal voltage: 0.7 to 1.1 x Un Maximum opening time: 50 ms Maximum power consumption: VA (for ±) and W (for =) Undervoltage release Undervoltage releases are devices which are generally controlled by an N/C type contact. They trigger instantaneous opening of the circuit breaker if their supply voltage drops below a certain threshold and in particular if the control contact opens. These releases are equipped with a device for limiting their consumption after the circuit has been closed. They are simply clipped on to the front panel of the device. No tool required. Nominal voltage Un: 24/30 V=, 48 V=, 110/130 V=, 220/ V±, 380/440 V± Tolerance on nominal voltage: 0.85 to 1.1 x Un Trip voltage: 35% Feedback voltage: 60% Opening time: 50 ms Maximum power consumption: VA reduced to 20 VA after 400 ms Time delay undervoltage releases These releases are equipped with an electronic device which delays their operation for approximately 3 seconds. They are designed to be used in unstable supplies, where the supply voltage of the release may be subject to variations or microbreaks, to avoid unwanted opening of the circuit breaker. They are also equipped with a power saving device for limiting their consumption. They are simply clipped on to the front panel of the device. Nominal voltage Un: 48 V=, 110/130 V=, 220/ V±, 380/440 V± Tolerance on nominal voltage: 0.85 to 1.1 Un Trip voltage: 35% Feedback voltage: 60% Tripping time: 3 s Maximum power consumption: VA reduced to 20 VA after 400 ms. Closing coils These coils are used for remotely controlling the closing of the circuit breaker (the circuit breaker being dependent on the prior loading of the springs). They are controlled by an N/O type contact. They are simply clipped on to the front panel of the device. No tool required. Nominal voltage Un: 24/30 V=, 48 V=, 110/130 V±/=, 230/ V± Tolerance on nominal voltage: 0.85 to 1.1 Un Opening time: 50 ms Power consumption: VA (for ±) and W (for =). Number of control auxiliaries for DMX Shunt trip 1 Undervoltage release (standard or time delayed) 1 Closing coils 1 11

14 DMX air circuit breakers (continued) Motor operators Motor operators, which are available in different voltages, are used for remotely reloading the springs of the circuit breaker mechanism immediately after the device closes. The device can thus be re-closed almost immediately after an opening operation. Combined with a release (current shunt trip or undervoltage release) and a closing coil, they can thus be used for remotely controlling the circuit breaker. If the supply voltage of the controls fails, it is still possible to reload the springs manually. Motor-driven controls have limit switch contacts which cut off the power supply of their motor after the springs have been reloaded. An auxiliary signalling contact Cat. No can be added to feed back the load status of the springs. They are easy to mount, with only three screws. Nominal voltage Un: 24/30 V=, 48 V=, 110/130 V=, 110/130 V±, 230/ V± Tolerance on nominal voltage: 0.85 to 1.1 x Un Spring reloading time: 3 s Maximum power consumption: VA (for ±) and W (for =) Mounting accessories Shunt trip Closing coil Undervoltage release (standard or time delayed) Motor-driven control 12

15 SIGNALLING ACCESSORIES Signalling contacts All DMX devices are equipped as standard with 8 auxiliary contacts (5 N/O + 3 N/C). An electrical fault signal contact (1 N/O) Cat. No can be added to indicate a fault trip. This contact remains closed until the device is reset. Permissible current: 10 A for V±, 5 A for 125 V=, 0.25 A for V=, Utilization category: AC23 DC3 (2 contacts in series). Position indicating contacts An additional block of 12 changeover contacts (6 N/O+ 6 N/C) Cat. No can be fitted on the draw-out versions to indicate the position of the device in its base (inserted/test/drawn-out). The drawn-out position is indicated only when the minimum clearances of the main circuit and the auxiliary circuits are reached. The contact block is supplied in a 6 N/0 + 6 N/C configuration, but it can be reconfigured by the user according to requirements. Connection and identification of accessories Electrical auxiliaries are connected on the front panel on terminal blocks provided for this purpose : 32 connection points available. Accessories are identified on the front panel. As the cover has window, it is easy to ascertain which coils are fitted on the device. In addition, an identification label each device indicates its composition on delivery.. SAFETY AND PADLOCKING ACCESSORIES The DMX circuit breakers and switches draw-out types are delivery as standard with safety padlocking shutters preventing access to live terminals. They have a number of other safety devices. Using padlocks: - ON/OFF buttons - Safety shutters - Drawn-out position and insertion of handle By key-operated lock: - Main contacts open - Isolated position Using an obstacle: - Protection unit settings - Insertion of the handle - Rating locating pin By cable interlocking, for supply inversion (see page 14) 13

16 DMX air circuit breakers (continued) SUPPLY INVERTORS All DMX and DMX-I devices (fixed and draw-out version) can be fitted with an interlocking mechanism which guarantees mechanical safety in the event of supply inversion. Interlocking is achieved using interlocking units mounted on the side of the devices and a cable system. This system allows devices of different sizes and types (3P, 4P, fixed, draw-out) to be interlocked. The cable system provides the flexibility to install DMX devices in a vertical configuration in the same enclosure or in a horizontal configuration in different columns. This mechanical interlocking system can be supplemented by motorised operators and an automation control unit (Cat. No ), making the inverter fully automatic. The interlocking mechanism with cables is easy to add to all DMX versions and is not dependent on their position in the assembly (2 m long cable as standard, other lengths on demand) Automation control unit Cat. No to make the inverter fully automatic FOR MORE INFORMATION DMX air circuit breakers with supply inversion. The two circuit breakers are connected to a common transfer busbar Triple inverters: Please consult us 14

17 WIRING DIAGRAM LP7 user's designated circuits D1 D4 D7 D10 D13 D16 B7 B9 B1 B11 B13 B15 C1 C3 C5 C7 C9 C11 C13 C15 +Ve +Ve +Ve B AL M ML ST CC UVI or UVT -Ve D3 D6 D9 D12 D15 D18 B8 B10 B2 B12 B14 B16 C2 C4 C6 C8 C10 C12 C14 C16 D2 D5 D8 D11 D14 D17 -Ve -Ve LP1 LP2 LP3 LP4 LP5 LP6 user's designated circuits B1 TO B16 C1 TO C16 D1 TO D6 D7 TO D12 D13 TO D18 Terminal References Automatic disconnect L.T. blocks Automatic disconnect L.T. blocks Carriage switch blocks for disconnect position (1) Carriage switch blocks for test position (1) Carriage switch blocks for connect position (1) (1) Changeover contacts can be reconfigured by user LP1 LP2 LP3 LP4 LP5 LP6 Optional features LP7 CC UV UVTD AL ML M ST Key Disconnected indication Test indication connected indication ACB tripped indication ACB OFF indication ACB On indication Closing springs charged indication Closing coil Undervoltage release Time delayed undervoltage release MP trip alarm (N/O) Charging motor limit switch Closing spring charging motor Shunt trip 15

18 DMX air circuit breakers (continued) CONNECTIONS Correct sizing and connection are essential for the reliability of installations and in particular for high power equipment. DMX devices have generously sized connection plates. On the draw-out versions the connection plates take multi-directional rear terminals. Minimum recommended dimension of connection plates and bars per pole Rear terminals Ie (A) Flexible bars (mm) Rigid bars (mm) P x 50 x 10 or 2 x 50 x 5 2 x 50 x x 50 x 10 or 2 x 50 x 5 2 x 50 x 5 DMX 0 fixed 17 10, P 1 2 x 50 x 5 1 x 50 x x 50 x x 50 x x 50 x 5 2 x 50 x x 50 x 10 2 x 60 x 10 10, x 50 x 10 3 x 60 x P x 50 x 10 or 2 x 50 x 5 2 x 50 x x 50 x 5 2 x 63 x 5 DMX 0 draw-out Ø ,5 22,5 1 1 x 50 x x 50 x 5 2 x 63 x x 50 x 10 1 or 2 x 60 x x 63 x 5 or 2 x 60 x x 60 x 10 or 2 x 80 x x 60 x 10 or 3 x 80 x 10 Fixed version x 75 x 5 or 1 x 80 x 5 DMX-L 0 DMX/DMX-L 4000 fixed and draw-out Draw-out version P P Ø , , ,5 42, x 100 x x 75 x 5 or 2 x 80 x x 100 x x 100 x 5 or 2 x 80 x x 100 x x 100 x x 100 x 10 16

19 The rear terminals can be positioned vertically or horizontally on the draw-out versions Tightening torque of rear terminals: 45 to 50 Nm. Connection of two 80 x 10 bars on each rear terminal of draw-out DMX 0 Connections : a few recommendations! Connections provide the electrical connection of equipment and are also responsible for a considerable proportion of their heat dissipation. Connections must never be under-sized. Plates or terminals must be used over a maximum area. Heat dissipation is encouraged by arranging the bars vertically. If an uneven number of bars is connected, place the higher number of bars on the upper part of the terminal. Avoid bars running side by side: this causes poor heat dissipation and vibrations. Place spacers between the bars to maintain a distance between them which is at least equivalent to their thickness. Connection of four 100 x 10 bars on each rear terminal of draw-out DMX

20 DMX air circuit breakers (continued) ELECTRICAL CARACTERISTICS According to IEC 947-2/947-3 Type of circuit breaker / type of trip free switches DMX DMX DMX DMX-I DMX-I Size No of poles ELECTRICAL CHARACTERISTICS (IEC 947-3) Rated service voltage Ue V± V= Rated impulse withstand voltage Uimp (kv) Rated impulse withstand voltage Uimp (kv) Category of use B B B B B B B B Rated frequency (Hz) Rated current of the release In (A) Neutral protection (% I of phase) Level of performance H L H L H L H L H L H L H L H L Breaking capacity Icu (ka) for DMX Icm (ka) for DMX-I 230 V± V± V± V± V± Service breaking capacity Ics (% Icu) Short time withstand current Icw (ka) t = 1s Suitability for isolation Display circuit breaker state Display contacts state Display springs charged/discharged POSSIBLE ACCESSORIES Electronic release with microprocessor MP /17 Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series MP /20 OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Protection against overload Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Protection against short-circuit Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Protection against earth fault OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Auxiliary contacts (5 NO + 3 NC) Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Alarm contacts 1 NO OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Opening releases OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Closing coil OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Motorised spring charging unit OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Fixed version Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Draw-out version Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Series Mechanical interlocks (2 to 3 units) OptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptionalOptional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional Optional 18 19

21 DMX air circuit breakers (continued) DIMENSIONS DMX 2 500, DMX-I Fixed version Base for draw-out version P : P : P : P : P : P : , P : P : P : P : P : P : 429 Draw-out version 3 P : P : Ø ,

22 DMX DMX-H 2 500/ DMX-L 2 500/ DMX-I Fixed version P : P : 540 Base for draw-out version TECHNICAL PART P : P : P : P : , P : P : P : P : 549 Draw-out version 3 P : P : Ø

23 Choice of XL 3 enclosure The XL enclosures are available in 3 widths and 3 depths, so its easy for you to create the configuration you want 22

24 Before building a distribution assembly, consideration must be given to the choice of enclosure. This must be the subject of particular care, in view of the power ratings involved. The restrictions connected with possible short circuits and heat dissipation aspects are of the utmost importance. On the one hand, busbars must be sized and held in place in accordance with established rules, on the other hand, the enclosures must be chosen so that their internal temperature remains acceptable. Ambient temperature The ambient temperature in the enclosure must be limited as far as possible to a value which does not exceed 40 C. Above this it becomes necessary to derate the permissible current in the protection devices and the bars. It is very important to take the actual load currents and the cooling conditions of the enclosure into consideration, in particular those connected with its protection index (IP rating). In XL 3, the DMX devices and the associated busbars are arranged according to an identical principle for all power ratings, that is, the possibility of mounting three busbars and two devices per enclosure. The correct size for the current, and thus the power to be dissipated, is obtained by adapting the depth of the assembly: mm min. up to 0 A mm min. up to 4000 A 4000 A main distribution board in XL equipped with 2 DMX in supply inverter configuration 23

25 Choice of XL 3 enclosure (continued) ASSEMBLY CONFIGURATIONS The simplicity of the principle for installing DMXs and busbars in XL enclosures makes it easy to convert the head of installation electrical diagram to the layout diagram. The examples of usual configurations, given on the following pages, can be used to assist with designing assemblies. The installation height of DMX units is always 600 mm whatever the type and size of the device. When 2 DMX devices are installed in the same cell, this leaves a useful 600 mm for running the busbars. Mounting principles Spaces for installing a connection, transfer, or main busbar Sleeve for any incoming cables Compulsory sleeve for 4-pole draw-out DMX 4000 and DMX-L 0/4000 or for vertical busbar 24

26 BASIC CONFIGURATIONS Stand-by power supply (without load shedding) Stand-by power supply (without load shedding) G G D1 D2 D1 D3 D2 Non priority circuits Priority circuits non priority circuits D1 D1 D3 priority circuits D2 D2 The two DMX devices (D1 and D2) are connected to a central common busbar. Since they are not simultaneously on-load, they can be in the same enclosure. The two DMX devices (D1 and D2) are not on-load simultaneously and can therefore be installed in the same enclosure. D3 can be on-load at the same time as D1, and must be installed in another enclosure. 25

27 Choice of XL 3 enclosure (continued) BASIC CONFIGURATIONS (continued) Dual power supply (total power) Dual power supply (reduced power with priority loads) D1 D2 D1 D2 D3 D4 Non priority circuits group 1 Non priority circuits group 2 D1 Priority circuits D2 D1 D2 non priority circuits group 1 D1 D3 priority circuits D2 D4 The two DMX devices (D1 and D2) draw current on a common busbar. They can only be installed in the same enclosure if the sum of their currents does not exceed the permissible value for the recommended size. non priority circuits group 2 26

28 Stand-by power Dual supply power (without supply load with shedding) stand-by and coupling on common supplied circuits G G D1 D3 D2 D4 D5 D6 Group 1 circuits ( I1 ) Group 2 circuits ( I2 ) Group 3 circuits ( I1 + I2 ) Sizing for D1 or D2 up to 4000 A Group 2 circuits D1 D2 D6 Group 3 circuits D3 D4 D5 Group 1 circuits If the sum of the actual load currents of devices D1 and D2 does not exceed the permissible value for the recommended size, the size of the assembly may be optimised. D1 D2 D3 D4 D5 D6 Group 1 circuits Group 3 circuits Group 2 circuits 27

29 Busbars up to 4000 A Numerous compositions of standard busbars enable all possible configurations up to 4000 A, in other enclosure and wiring sleeves 28

30 Isolating supports Cat. Nos and take one to four 5 mm thick flat bars up to 120 x 5 or one to three 10 mm thick flat bars up to 125 x 10. They can be used to create numerous busbar configurations: - Transfer busbars - Main busbars at the top or the bottom - Horizontal main busbars at the back of the enclosure - Side-mounted vertical busbars in enclosure and wiring sleeve (internal and external) Support Cat. Nos /25: 4 possibilities for assembly Top or bottom horizontal main busbar (1) Transfer busbar (2) Fixed support Cat. No The 4000 A busbar can be supplemented by branch busbars or by the XL-Part system. Side-mounted vertical busbars Main busbar at the back (1) Fitting a top or bottom main busbar in a 725 mm depth enclosure requires the creation of a partial chassis (2) Fitting a transfer busbar in a 725 mm depth enclosure requires the creation of a partial chassis and the use of 2 internal or external wiring sleeves. 29

31 Busbars up to 4000 A (continued) DETERMINING THE APPROPRIATE CROSS-SECTION Supports Cat. No to 4 bars, 5 mm thick, per pole 1 to 3 bars, 10 mm thick, per pole The required cross-section of the bars is determined according to the operating current, the protection index (IP rating) of the enclosure and after checking the short circuit thermal stress. The currents are named according to the definitions in standard IEC applied to the usual operating conditions for a temperature rise!t of the bars which does not exceed 65 C. Current according to standard IEC Ie: rated operating current to be taken into consideration in enclosures with natural ventilation or in panels which have an IP rating < 30 (ambient internal temperature < 25 C). Ithe: thermal current in enclosure corresponding to the most severe installation conditions. Weatherproof enclosures do not allow natural renewal of the air. The IP rating is > 30 (ambient internal temperature < 50 C). The permissible current in n bars is less than n times the permissible current in one bar. Use n = 1.6 to 1.8 for a group of 2 bars, n = 2.2 to 2.4 for 3 bars and n = 2.7 to 2.9 for 4 bars. The wider the bars, the more coefficient n is affected, the more difficult they are to cool and the higher the mutual inductance effects. The permissible current density is not therefore constant: It is approximately 3 A/mm 2 for small bars and drops to 1 A/mm 2 for groups of large bars. 30

32 Rigid flat copper bars - edgewise mounting le(a) IP30 Ithe(A) IP >30 Number Dimensions (mm) I 2 t (A 2 s) x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 5 (1) 1.17 x x 5 (1) 4.67 x x 5 (1) 1.05 x x 5 (1) 1.87 x (1) needs stainless steel threaded assembly rod, diameter 8, to be supplied separately and cut to length le(a) IP30 Ithe(A) IP >30 Number Dimensions (mm) I 2 t (A 2 s) x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x Positioning of the groups of bars Bars mounted edgewise on vertical busbars or horizontal on supports Cat. No in horizontal position 31

33 Busbars up to 4000 A (continued) DETERMINING THE DISTANCES BETWEEN SUPPORTS The distance between supports is determined according to the electrodynamic stress generated by the short circuit. The forces exerted between the bars during a short circuit are proportional to the peak value of the short circuit current. RMS value of the prospective short circuit current (Ik) This is the prospective maximum value of the current which would circulate during a short circuit if there were no protection device. Value of the peak current (Ipk) Since air circuit breakers have restricted limitation characteristics, the value of the prospective peak current is determined using the prospective short circuit current and applying of the cœfficient of asymmetry. Prospective short-circuit current This is the RMS value of the short circuit current which would circulate if there were no protection device. Ik 1 : between phase and neutral Ik 2 : between 2 phases Ik 3 : between 3 phases. These values must not be confused with Ipk. The electrodynamic forces are proportional to the square of the peak current. It is this value which must be taken into consideration when determining the distances between the supports. Limiting protection device According to the rating of the prospective short-circuit, the limitation curves of protection devices (DX and DPX) give the rating of the limited peak. The non-limited peak lcs curve corresponds to an absence of protection. The table below gives instantly the limited peak value (lpk) for the maximum prospective shortcircuit value equal to the breaking capacity (lcu) of the device. For lower prospective short-circuit values, reading the curves will provide an optimised value. Isc Peak (ka) Isc peak limited Non limited Isc peak Prospective Isc Limitation curve RMS Isc (ka) Device Rating (A) Max. peak Isc (ka) DPX DPX DPX DPX DPX to DPX ER 100 to 22 DPX 40 to 27 DPX-H 40 to 34 DPX 630 to DPX-H 630 to DPX to DPX-H to

34 Value of asymmetrical first peak Cœfficient of asymmetry Peak Isc RMS value of Isc Practical determination of the distances between the supports according to the peak current (Ipk) The following tables can be used to determine the maximum distances D (in mm) between 2 supports, and thus create sets of busbars, based on the required Ipk value. The shorter the distance between the supports, the higher the permissible Ik. Time The relationship between the peak value and the RMS value of the prospective short-circuit current is defined by the cœfficient of asymmetry n: D Prospective RMS Isc (ka) n " < I " < I " < I " < I 2.2 The distance D after the last support must always be less than 30% of the distance D D D' 33

35 Busbars up to 4000 A (continued) Maximum distance D (in mm) for multipole supports Cat. Nos /25/54 with 5 mm thick copper bars Bars Peak Isc (Ipk in ka) bar per pole 2 bars per pole 75 x 5 Bars 75 x 5 50 x 5 63 x x x 5 50 x 5 63 x x x 5 80 x 5 80 x Peak Isc (Ipk in ka) Bars Peak Isc (Ipk in ka) bars per pole 4 bars per pole 50 x 5 63 x 5 75 x 5 Bars 75 x x x 5 50 x 5 63 x 5 80 x 5 80 x x x 5 Peak Isc (Ipk in ka)

36 Maximum distance D (in mm) for multipole supports Cat. Nos with 10 mm thick copper bars Bars Peak Isc (Ipk in ka) x x bar per pole x Bars Peak Isc (Ipk in ka) x x bars per pole x Bars 3 bars per pole 80 x x 10 Peak Isc (Ipk in ka) x

37 Mounting DMX devices 36

38 DMX circuit breakers and switches are mounted on horizontal plates. These plates are available for fixed version and draw-out version DMXs and for 24 modules (width 600 mm) and 36 modules (width 850 mm) XL enclosures. They consist of a horizontal plate and a strengthening crosspiece. Fixed DMX device DMX devices up to 0 A are mounted in 24 modules enclosures with a usable width of 600 mm. 600 Draw-out DMX device Mounting fitting plate for DMX in XL enclosure 600 DMX plates have pre-drilled holes to enable the insertion of interlocking cables for supply inversion mountings 37

39 Mounting DMX device (continued) PLATE SELECTION CHART Version Fixed devices Draw-out devices XL enclosure type 24 modules I = 600 mm 36 modules I = 850 mm 24 modules I = 600 mm 36 modules I = 850 mm DMX 0 DMX 4000 DMX-L 0 DMX-L P P P P Fixed or draw-out DMX devices are placed on the plate and fixed using screws and nuts. Given the weight of the devices, the use of lifting equipment is strongly recommended. FINISH The metal faceplates for DMX devices are 600 mm in height and equipped with hinges and a lock to facilitate maintenance operations. Installing a draw-out DMX in its base Faceplate for draw-out DMX devices in 24 modules XL enclosures FACEPLATE SELECTION CHART Version Fixed devices Draw-out devices XL enclosure type 24 modules I = 600 mm 36 modules I = 850 mm 24 modules I = 600 mm 36 modules I = 850 mm DMX 0 DMX 4000 DMX-L 0 DMX-L P P P P

40 CHOOSE YOUR DMX DMX, DMX-H AND DMX-L AIR CIRCUIT BREAKERS Nominal rating (A) Breaking capacity Fixed version Draw-out version (ka) 3P 4P 3P 4P DMX-I TRIP FREE SWITCHES Nominal rating (A) 3P Fixed version 4P Draw-out version 3P 4P CONVERSION OF A FIXED DEVICE INTO A DRAW-OUT DEVICE Base + Cluster contacts Nominal rating DMX-L (A) DMX, DMX-H and DMX-I DMX-L DMX, DMX-H and DMX-I 3P 4P 3P 4P 3P 4P 3P 4P

41 DMX for example: xxxxxxx 800 xxxxxxxx to A air circuit breakers Dimensions (p. 20) Technical characteristics (p. 18) Air circuit breakers equipped with a trip unit (MP 17 (1) electronic protection unit), rear terminals and auxiliary contacts (5 NO + 3 NC) The DMX air circuit breakers in the draw-out version are delivered with a base equipped with adjustable rear terminals and independently lockable upstream/downstream isolation shutters Pack Cat.Nos Fixed version DMX-H Breaking capacity Icu 50 ka (415 V±) 3P 4P In A A A A A A Pack Cat.Nos Draw-out version DMX Breaking capacity Icu 50 ka (415 V±) 3P 4P In A A A A A A DMX-H Breaking capacity Icu 65 ka (415 V±) 3P 4P In A A A A A A DMX-H Breaking capacity Icu 65 ka (415 V±) 3P 4P In A A A A A A DMX-L Breaking capacity Icu 100 ka (415 V±) 3P 4P In A A A A A A DMX-L Breaking capacity Icu 100 ka (415 V±) 3P 4P In A A A A A A Accessories (p. 44) Accessories (p. 44) (1) base protection 40

42 DMX and A air circuit breakers Dimensions (p. 20) Technical characteristics (p. 18) Air circuit breakers equipped with a trip unit (MP 17 (1) electronic protection unit), rear terminals and auxiliary contacts (5 NO + 3 NC) The DMX air circuit breakers in the draw-out version are delivered with a base equipped with adjustable rear terminals and independently lockable upstream/downstream isolation shutters Pack Cat.Nos Fixed version DMX Breaking capacity Icu 50 ka (415 V±) 3P 4P In A A Pack Cat.Nos Draw-out version DMX Breaking capacity Icu 50 ka (415 V±) 3P 4P In A A DMX-H Breaking capacity Icu 65 ka (415 V±) 3P 4P In A A DMX-H Breaking capacity Icu 65 ka (415 V±) 3P 4P In A A DMX-L Breaking capacity Icu 100 ka (415 V±) 3P 4P In A A DMX-L Breaking capacity Icu 100 ka (415 V±) 3P 4P In A A FOR MORE INFORMATION Ask for our technical manual Distribution and Power Auxiliaries see p. 43 (1) base protection 41

43 DMX TM electronic protection units DMX-I trip free switches from 1 to 4000 A MP 17 supplied on DMX as standard MP 18 supplied on request only MP 20 supplied on request only Curves (p. 43) Dimensions (p. 20) DMX and DMX circuit breakers take protection units that enable very precise adjustments of the protection conditions, while maintaining total discrimination with downstream devices Pack Cat.Nos Electronic protection unit MP 17 As standard DMX and DMX are equipped with electronic protection unit MP 17 with Ir, Im, Tm, Ii adjustments on the front t(s) Im Ir Tm Test equipment For checking the operation of the protection unit and tripping and opening conditions of the DMX poles Test unit External power supply For powering the protection unit when the circuit breaker is open or not powered Fixed unsecured external power supply Ii Electronic protection units on request On request, DMX s can be equipped with an electronic protection unit including an LCD adjustable by keyboard and an external memory unit on drawout versions MP 18 Consult Enables Ir, Im, Tr adjustments on the front us Functions : - current display - fault adjustment and log MP 20 Consult Enables Ir, Imr, Tmr, Im, Tm adjustments on the front us Functions : - current display - fault adjustment and log Optional functions can be added: - load check and load-shedding - trip warning - centralised communication and check function - auxiliary power supply I(A) Non-automatic air-circuit breakers with rear terminals and auxiliary contacts (5 NO + 3 NC) Pack Cat.Nos DMX-I Fixed version 3P 4P In A A A A Draw-out version 3P 4P In A A A A The DMX trip free switches in the draw-out version are delivered with a base equipped with adjustable rear terminals and independently lockable upstream/downstream isolation shutters DMX-I Fixed version 3P 4P In A A A A Draw-out version The DMX trip free switches in the draw-out version are delivered with a base equipped with adjustable rear terminals and independently lockable upstream/downstream isolation shutters 3P 4P In A A Choice of faceplates (see Legrand General Catalogue) For electronic protection units MP 18, MP 20 mounted on DMX, please consult us 42

44 DMX, DMX-H, DMX-L, DMX-I control and signalling auxiliaries Technical characteristics (p. 11, 13) Pack Cat.Nos Control and signalling auxiliaries Shunt trip When energised the circuit breaker will be tripped V= V= /130 VA or / VA or /440 VA or = Undervoltage releases When the coil is de-energised, the circuit breaker will be tripped V= V= /130 V= / VA /440 VA Delayed undervoltage releases Improves immunity to nuisance tripping V= /130 V= / VA or /440 VA or = Motor operators To motorise a DMX, it is necessary to attach, to the motor operators, a release coil (undervoltage or trip on energising) and a closing coil The motor operator is delivered with a spring charge contact /30 V= V= /130 VA /130 V= / VA Pack Cat.Nos Control and signalling auxiliaries (continued) Closing coils Enables remote closing of the circuit breaker if the closing spring is charged /30 V= V= /130 VA and / VA and = Signalling contacts NO fault signal contact NO + 6 NC position contact (in/test/out) for draw-out version Locking Key locking in "open" position Mounting of the lock on the ACBs Ronis lock (lock and key included) Profalux lock (lock and key not included) Key locking in the draw-out position Mounting of the lock on the base Ronis lock (lock and key included) Profalux lock (lock and key not included) Door locking Prevents opening of the door with the circuit breaker closed Left-hand side mounting (hinges on the right) Right-hand side mounting (hinges on the left) FOR MORE INFORMATION See the our technical manual Distribution and Power 43

45 for DMX, example: DMX-H, xxxxxxx DMX-L, DMX-I xxxxxxxx accessories for example: xxxxxxx xxxxxxxx DMX 0, mounted on base Cat. No Pack Cat.Nos Accessories Rating mis-insertion device Prevents the insertion of a draw-out circuit breaker in an incompatible base Base/circuit breaker insertion lock Rating mis-insertion device Counts total number of operation cycles of the device Operations counter Equipment for supply invertors The mechanical interlocking of devices which are placed above one another or installed side by side requires an interlocking unit for each device and a cable set Interlocking units For installation on the side of circuit breakers DMX, DMX-H, DMX-L and DMX-I 3P 4P Fixed version For DMX 2 500, DMX-H and DMX-I For DMX 2 500, DMX-H and DMX-I Draw-out version For DMX 2 500, DMX-H and DMX-I For DMX 4 000, DMX-H 4 000, DMX-L 2 500/4 000 and DMX-I Cables for interlocking assemblies Set of cables for 2 devices (l = 2m) Pack Cat.Nos Conversion of a fixed device into a draw-out device Converting a fixed device requires a base, a set of cluster contacts and a mounting tool Bases for draw-out device Accept ACBs equipped with cluster 3P 4P contacts For DMX 2 500, DMX-H and DMX-I For DMX 4 000, DMX-H 4 000, DMX-L 2 500/4 000 and DMX-I In A For DMX 4 000, DMX-H 4 000, DMX-L 2 500/4 000 and DMX-I In = A Sets of cluster contacts For use on the rear terminals of the fixed devices using the mounting tool For DMX 2 500, DMX-H and DMX-I In A For DMX 2 500, DMX-H and DMX-I In = A and A For DMX 4 000, DMX-H 4 000, DMX-L 2 500/4 000 and DMX-I In A For DMX 4 000, DMX-H 4 000, DMX-L 2 500/4 000 and DMX-I In = A Cluster mounting tool Necessary for mounting the clusters on the rear terminals of the device Cluster mounting tool Automation control unit For setting the conditions for supply inversion, generator on/off, status acquisition for DMX and DPX circuitbreakers, open/closed Power supply: 230 V or V Connection by plug-in terminals Standard unit Communicating unit, enabling data transmission (RS 485 port) NEW 44