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08/07 AWB1230-1407GB

5 – 5

5.1.6

Use in IT systems

 5.1.7

Regulations

In IEC 60947-2 or EN 60947-2 “Low voltage switchgear Part 2: 
circuit-breakers”  for the use of circuit-breakers in an unearthed or 
impedance earthed network (IT systems) an extra test to IEC 
60947-2 Appendix H is required.

Subsequently the tests with 1.2 times the highest setting of the 
short time delayed overcurrent trip (S trip) or the undelayed 
overcurrent trip ( I trip) when no S trip is available, as single pole 
short-circuit switch-off capacity I

IT

 are to be verified. This is for a 

maximum of 50 kA. The tests are to carried out with the phase 
voltages of the highest rated operating voltage Ue for use in the 
network.

With this the worst case fault that could occur in the IT system is 
covered, with a double earth fault on the load and incoming sides  
See following illustration:

Fault

 

1

Fault 2

Frame

Impedance

Transformer

Explanation:

– After fault 1 fault 2 then occurs.

– With that there is then a double earth fault on the load and 

incoming sides.

– On the main contacts in phase L1 is then the full phase voltage of 

e.g. 690 V.

– At the same time the contact must carry a high short-circuit 

current.

L2

L1

L3

d

b

c

a

e

690 V AC

690 V

Summary of Contents for IZM Series

Page 1: ... 11 D 53115 Bonn E Mail info moeller net Internet www moeller net 2001 by Moeller GmbH Sujekt to alteration AWB1230 1407GB Doku Doku MP 08 07 Printed in Germany 08 07 Article No 101532 4 patpka yvxv Operating Manual 08 07 AWB1230 1407GB A A A We keep power under control We keep power under control ...

Page 2: ...oduction Oliver Fiebag Elias Heidrun Riege Ingo Meyer Translation Nigel Green David Long All rights reserved including those of the translation No part of this manual may be reproduced in any form printed photocopy microfilm or any other process or processed duplicated or distributed by means of electronic systems without written permission of Moeller GmbH Bonn Subject to alteration without notice...

Page 3: ...and software measures should be implemented for the I O interface so that a line or wire breakage on the signal side does not result in undefined states in the automation devices Deviations of the mains voltage from the rated value must not exceed the tolerance limits given in the specifications otherwise this may cause malfunction and dangerous operation Emergency stop devices complying with IEC ...

Page 4: ......

Page 5: ...IZM IN 2 fixed mounting 3 and 4 pole 7 6 IZM IN 2 withdrawable 3 and 4 pole 7 8 IZM IN 3 fixed mounting 3 and 4 pole 7 10 IZM IN 3 withdrawable 3 and 4 pole 7 12 External current transformer for N conductor 7 14 Voltage transformers 7 14 Further dimension drawings 7 14 8 Circuit diagrams 8 1 Terminal assignment accessories 8 1 Auxiliary and control switches 8 2 Signal switch 8 2 Voltage release el...

Page 6: ...ofitting locking device for racking handle 15 11 Retrofitting locking device for reset button 15 13 Equipment for padlocks 15 14 Locking bracket for Safe OFF 15 15 Locking device for shutters 15 16 Locking device for guide rails 15 17 Locking device for racking handle 15 18 Locking device for spring charging lever 15 18 Locking device for Mechanical OFF ON button 15 18 16 Sealing fixtures 16 1 17 ...

Page 7: ...r circuit breakers To contact Field Service a chapter 26 Symbols Edition date Page Description 10 02 All Revision of complete manual 06 05 All Revision of complete manual 08 07 All Revision of complete manual Danger Hazardous voltage Can cause death or serious personal injury as well as damage to device and equipment Before working on this device the system must be switched off Danger if spring is...

Page 8: ...0 2 08 07 AWB1230 1407GB ...

Page 9: ...hdrawable unit transport shaft 14 Options label a page 2 1 15 Earthing terminal a page 5 21 16 Position indicator a page 6 2 17 Earth fault tripping table a page 9 17 18 Safety lock crank handle option a page 15 11 19 Control rod option a page 15 3 20 Overcurrent release a page 9 1 21 Rating plug a page 9 35 22 Mechanical OFF button or Emergency Stop pushbutton option a page 14 3 23 Ready to close...

Page 10: ...ng terminal o 14 mm a page 5 21 9 Locking device guide rail a page 15 17 10 Locking device to prevent racking with panel door open option a page 17 2 11 Door locking withdrawable unit option a page 17 2 12 Guide rail a page 6 1 13 Factory setting rated current coding a page 19 5 14 Switch ground sliding contact on request 15 Equipment dependant coding option a page 19 6 16 Shutter actuator a page ...

Page 11: ...gnalling switch 2nd voltage release 1st shunt release Delayed undervoltage release or 2nd shunt release Standard auxiliary contacts Additional auxiliary contacts BA_01092 ID Nr 4912 Max rated current of the circuit breaker Rated insulation voltage Direction for use in IT systems Rated impulse withstand voltage Rated operational voltage Rated short time withstand current Rated short circuit breakin...

Page 12: ...gital overcurrent release XZMA Options XT Earth fault protection Neutral conductor protection can be switched on off XZMV T Options XT A Earth fault protection N conductor protection adjustable XAM LCD display XCOM DP Communication interface XMP H Measurement module XZMU Options XT A Earth fault protection N conductor protection adjustable XCOM DP Communication interface XMP H Measurement module X...

Page 13: ...2 4 Rating plug label 2 5 Withdrawable unit label Part no Rated current of the circuit breaker Position signalling switch 0134 Withdrawable unit maximum current rating Rated insulation voltage Internal handling numbers Part no ...

Page 14: ...2 4 08 07 AWB1230 1407GB ...

Page 15: ...suited for operation in enclosed spaces not subject to operating conditions aggravated by dust caustic vapours or gases Circuit breakers to be installed in dusty or damp locations must be appropriately enclosed The circuit breaker is in conformity with the standards IEC 60947 2 EN 60947 2 DIN VDE 0660 Part 101 Danger Dangerous voltage Can cause death serious injury or damage to material property O...

Page 16: ...3 2 08 07 AWB1230 1407GB ...

Page 17: ... only in original packing Red transport indicator Arrow in the top half is partly or fully blue Arrow in the top half is white Transport not according to instructions switch was tilted or overturned Check circuit breaker for transport damage Notify damages to forwarding agent Circuit breaker was not tilted or overturned during transport Check humidity indicator Further storage Pink Blue Renew dess...

Page 18: ...tested crane harnesses Use personnel safety equipment to lift or move circuit breakers and withdrawable unit Caution Circuit breaker Withdrawable unit Circuit breaker Withdrawable unit Do not put on the rear side Frame size No of poles Weight IZM IN 1 3 IZM IN 1 4 IZM IN 2 3 IZM IN 2 4 IZM IN 3 3 IZM IN 3 4 43 kg 50 kg max 64 kg max 77 kg max 90 kg max 108 kg 25 kg 30 kg max 45 kg max 54 kg max 70...

Page 19: ...nd also standards concerning the correct use of lifting equipment and tools and the use of personal protection equipment safety glasses etc should be especially observed Non observance can result in death severe personal injury or substantial property damage Danger Heavy device Incorrect lifting can cause death or serious injury as well as damage to the device and equipment Never lift a circuit br...

Page 20: ...ting brackets For fixed mounted circuit breaker only Mounting dimensions Representation of IZM IN 2 with front connection Part no Mounting brackets only for IZM IN 1 and IZM IN 2 IZM1 2 XTW 4 bolts M10 8 8 nuts strain washers 4 bolts M8 8 8 strain washers Non removable nut ...

Page 21: ...08 07 AWB1230 1407GB 5 3 Dimension diagram mounting brackets 17 5 342 113 34 40 43 23 402 452 30 16 20 400 o 11 20 17 172 5 20 152 5 212 337 5 9 16 0 5 o 20 o 9 o 13 5 455 ...

Page 22: ... IN 2 Withdrawable with arc chute cover 440 0 02 0 690 0 02 0 IZM IN 3 Fixed mounting 440 751 0 0 690 751 0 0 1000 180 0 0 IZM IN 3 Withdrawable without arc chute cover 440 501 0 0 690 501 0 0 1000 100 0 0 IZM IN 3 Withdrawable with arc chute cover 440 0 02 0 690 0 02 0 Rated operational voltage above control circuit plug Side each Rear V AC mm mm mm IZM IN 1 Fixed mounting 440 150 20 20 690 300 5...

Page 23: ...ff capacity IIT are to be verified This is for a maximum of 50 kA The tests are to carried out with the phase voltages of the highest rated operating voltage Ue for use in the network With this the worst case fault that could occur in the IT system is covered with a double earth fault on the load and incoming sides See following illustration 햲 Fault 1 햳 Fault 2 햴 Frame 햵 Impedance 햶 Transformer Ex...

Page 24: ...re in their existing features not suitable for IT networks for all values of the rated operating voltage and the corresponding types or sizes The following symbol must be directly behind the rated operating voltage e g 690 V The labelling for single sizes and voltages can be seen in the above table Overview circuit breaker IZM in IT systems to IEC 60947 2 or EN 60947 2 Appendix H Type 3 4 pole IZM...

Page 25: ...ndard connection for fixed mounted circuit breakers and withdrawable unit For withdrawable unit only a Retrofit installation of horizontal connections page 5 12 5 2 2 Flange connection only for withdrawable The mounting of the flange connection is similar to the mounting of the vertcal and horizontal connections a page 5 12 o 13 5 mm M 12 X Screw in depth x 18 24 mm 70 4 Nm ...

Page 26: ...le hole fitting 2 Version double hole fitting 3 Holes o 13 5 85 Nm 8 Nm 85 Nm 1 2 3 4 5 6 7 8 8 Nm 9 Size 5 Size 5 1 For IZM IN 1 IZM IN 2 F 1000 A and F 2000 A 2 For IZM IN 1 IZM IN 2 IZM IN 3 1600 A 2500 A 3200 A 4000 A 3 Long connecting bar 4 Short hexagon socket screw ISO 4762 M6 with strain washer 5 Short spacer 6 Coach screw DIN 603 M12 with strain washer and nut 7 Long distance sleeve 8 Lon...

Page 27: ...rd version single hole fitting 2 Version double hole fitting 3 Slots for phase separation walls mounting position as shown 4 Support 5 Holes o 13 5 85 Nm 85 Nm 1 2 3 4 5 10 Nm 10 Nm Size 5 Size 5 1 For IZM IN 1 IZM IN 2 F 1000 A and F 2000 A 2 For IZM IN 1 IZM IN 2 IZM IN 3 1600 A 2500 A 3200 A 4000 A 3 Hexagon socket screw ISO 4762 M6 with strain washer 4 Support mounting position as shown 5 Coac...

Page 28: ... A1 1 2 connection bars per main connection above and below fixing by offset slot a Picture for IZM IN 2 Size 2500 A1 IZM IN 2 3 M12 8 8 nut spring washer above below 3 o 13 5 mm 85 Nm 3200 A 1 1 connect bar per main connection middle fixing a Picture for IZM IN 1 Rated current Size 4 M12 8 8 nut spring washer above below 5000 A 4 o 13 5 mm 85 Nm IZM IN 3 Rated current Size ...

Page 29: ... 13 5 Size Rated current IZM IN 2 2000 A 2500 A 3200 A 2 M 6 3 x o 13 5 Size Rated current IZM IN 3 5000 A 2 M 6 4 x o 13 5 Size Rated current IZM IN 1 1000 A 1600 A Size Rated current IZM IN 3 6300 A Vertical connections left and right asymmetric 1 2 3 Rear side of withdrawable unit ...

Page 30: ...lle Removing horizontal connection Rear drawer area Size 5 Combination screw M6x20 Installing vertical connection Rear drawer area Combination screw M6x20 Mounting steps for installation of horizontal or flange connection are similar 1 2 3 4 1 2 3 4 8 Nm ATTENTION Only use similarly equiped lamelle blocks for assembly ...

Page 31: ...TF16 0 IZM IN 2 F 2000 A IZM2 XATF20 0 2500 A IZM2 XATF25 0 3200 A IZM2 XATF32 0 IZM IN 3 F 4000 A IZM3 XATF40 0 Front connection single hole fitting bottom IZM IN 1 F 1000 A IZM1 XAT1F10 U 1250 A 1600 A IZM1 XAT1F16 U IZM IN 2 F 2000 A IZM2 XAT1F20 U 2500 A IZM2 XAT1F25 U 3200 A IZM2 XAT1F32 U IZM IN 3 F 4000 A IZM3 XAT1F40 U Front connection double hole fitting bottom IZM IN 1 F 1000 A IZM1 XATF...

Page 32: ...IZM2 XATF20 AV 2500 A IZM2 XATF25 AV 3200 A IZM2 XATF32 AV IZM IN 3 F 4000 A IZM3 XATF40 AV Supports for front connections with withdrawable unit 2 supports per switch required 3 pole for 3 front connections IZM IN 1 F 1600 A IZM1 XATFS IZM IN 2 F 3200 A IZM2 XATFS IZM IN 3 F 4000 A IZM3 XATFS 4 pole for 4 front connections IZM IN 1 4 F 1600 A IZM1 XATFS4 IZM IN 2 4 F 3200 A IZM2 XATFS4 IZM IN 3 4...

Page 33: ...1000 1 60 10 1 60 10 1250 2 40 10 2 40 10 1600 2 50 10 2 50 10 2000 3 50 10 3 50 10 2500 2 100 10 2 100 10 3200 3 100 10 3 100 10 IZM IN 3 4000 4 100 10 4 100 10 5000 5 100 10 5 120 10 6300 6 120 10 6 120 10 1 Other Cu bar sizes possible but the total Cu cross section must not be less 2 Aluminium bars please enquire ATTENTION On 4 pole circuit breakers the neutral conductor must always be connecte...

Page 34: ...to DIN 46228 T1 2 x up to 1 5 mm2 tubular with plastic sheath to DIN 46228 T2 5 4 1 Plug connector Arrangement Retrofitting Only for circuit breakers 1000 V version Strip conductors 1 x 2 x Screw terminals 0 5 2 5 mm2 AWG 20 14 Wire end ferrule1 0 5 1 5 mm2 AWG 20 15 Wire end ferrule1 Spring loaded terminals 0 5 2 5 mm2 AWG 20 14 Wire end ferrule2 0 5 2 5 mm2 AWG 20 14 Wire end ferrule2 1 Arc chut...

Page 35: ...t require a control circuit plug The cable is directly connected to the sliding contact module 5 4 3 Control circuit plug Screw terminals Spring loaded terminals Attach guide tongues fixed mounted circuit breaker only 1 Connection area with sliding contact modules 2 Sliding contact module Connecting wires 3 0 0 6 1 2 1 2 0769 3 0 0 6 3 0 0 6 2 terminals in parallel per contact 3 0 0 6 Back side of...

Page 36: ...eakers Fitting auxiliary connectors L 1 Groove 2 Guide 3 Modul labelling here X5 must show at front 4 Module X5 0100 01_nu X5 X6 X5 X6 X5 X6 1 2 3 click 1 2 3 4 1 1 2 2 1 Control circuit plug 2 Fixed mounting Knife contact rail Withdrawable Sliding contact module ...

Page 37: ...Activated signalling switch S24 Stored condition indication S21 Electrical ON pushbutton S10 Signalling switch on 1st release S22 Signalling switch on 2nd release S23 X8 Overcurrent release XZMU XZMD internal System bus Connection for external current transformer for overload protection in N conductor and earth fault protection Current transformer mounted in N conductor Current transformer mounted...

Page 38: ...ng loaded terminals option IZM XKL HZ NSE0_00976a IZM XKL C Plug connector on basic unit IZM XKL ML NSE00978 Connection with screw terminals option IZM XKL HS NSE0_00975a Screwless connection spring loaded terminals option IZM XKL HZ NSE0_00976a Sliding contact module for withdrawable option IZM XKL SK N S E 0 _ 0 0 9 7 7 a Sliding contact module with screw fixing for withdrawable standard IZM XKL...

Page 39: ... circuit breaker our Field Service can be used To contact Field Service a chapter 26 Switching off and discharging the storage spring a page 24 2 Remove fixed mounted circuit breaker a page 5 1 Remove terminals other than horizontal terminals a page 5 7 Remove front panel a page 24 6 Remove overcurrent release a page 9 39 Install rated current coding on the new circuit breaker feet and on the with...

Page 40: ...6x20 screws Installing racking mechanism 1 Install racking mechanism 2 When threaded holes exist bolt the racking mechanism tight with M6x12 cheese head screw strain washer and 6x18x3 washer When no screw thread exists grease a self tapping screw and screw in Tightening toque machine screw 6 Nm self tapping screw 5 Nm Installing racking shaft 1 Insert racking shaft 2 Fit crank 3 Secure crank handl...

Page 41: ... ordered separately a page 5 7 Install withdrawable unit a page 5 1 Insert the circuit breaker in the withdrawable unit and rack into connected position a page 6 1 Conversion kit part numbers Conversion kit for fixed mounted into withdrawable circuit breaker Note Conversion kits can only be ordered using the part no shown above and also giving the Indent no of the circuit breaker 1 2 Frame size Pa...

Page 42: ...5 24 08 07 AWB1230 1407GB ...

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