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IZM32 / IN32 low voltage air circuit breaker

MN013017EN May 2022 www.eaton.com

Section 3: Circuit breaker description and operation

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5 7

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2 4

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50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96

1 +

+ 24

ZIN

ZOU

LCC

SR1

Frame rating modules installed on series

IZM32 / IN32 air circuit breakers with PXR are perma-

nent and SHOULD NEVER BE REMOVED. The frame

rating module battery cover with printed I

rating should

not be changed without proper reprogramming of the

trip unit. The I

rating programmed from the factory

is displayed in the lower left hand corner in the LCD

screen whenever power is applied to the trip unit. The

displayed on the LCD reflects the actual I

rating of

the breaker, while the value on the battery cover is for

reference only when the LCD is not powered. The I

rat-

ing displayed on the LCD screen and I

rating printed on

the frame rating module battery cover MUST ALWAYS

MATCH.

3-4.5 Trip actuator

The low-energy trip actuator is a small electromagnetic

device that provides the necessary mechanical force

to initiate the tripping action of the circuit breaker. The

electronic trip unit provides a pulse to the coil of the

trip actuator, allowing the mechanical tripping action to

take place. The trip actuator is reset by the operating

mechanism.

3-4.6 Fixed high instantaneous non-adjustable

trip

Series IZM32 circuit breakers have a fixed instantaneous

non-adjustable setting. This fixed instantaneous trip will

initiate a trip at a high current peak which depends on the

Figure 3-10 Secondary connector top view

circuit breaker type and rating. This setting is always active,

regardless of the instantaneous setting.

3-4.7 Non-automatic device

Series IZM32 / IN32 is available in a non-automatic

configuration. It is derived from the corresponding IZM32

/ IN32 automatic breaker but does not include the trip

unit, Rogowski coil type current sensors, and the high

instantaneous trip feature. The overall dimensions and

the capability of mounting most accessory items are

maintained. Non-automatic device are tested in keeping

with IEC 60947-2 requirements.

Содержание IZM32

Страница 1: ...Instruction Manual MN013017EN IZM32 IN32 low voltage air circuit breaker IZM32 IN32 May 2022...

Страница 2: ...are covered in individual instruction leaflets specific to the accessory This information is also available from the Eaton Web site at www eaton com For application information consult Eaton or see ap...

Страница 3: ...dary jumpers 5 2 7 Installing drawout circuit breaker 6 2 7 1 Circuit breaker positioning 6 2 7 2 Levering circuit breaker 8 2 8 Fixed circuit breaker 11 2 9 Circuit breaker operation 11 2 10 Technica...

Страница 4: ...ES 34 SECTION 6 WIRING DIAGRAMS 44 SECTION 7 INSPECTION AND MAINTENANCE 51 7 1 General 51 7 2 General cleaning recommendations 51 7 3 When to inspect 51 7 4 What to inspect 51 7 4 1 Functional field t...

Страница 5: ...ign using an electronic tripping system It is designed and tested for use at nominal voltages of AC380 415V 440V and 500 690V IZM32 IN32 circuit breakers are available with continuous current ratings...

Страница 6: ...t its operation and the associated hazards should be permitted to work on the equipment Additionally only qualified personnel should be permitted to install or operate the equipment 2 Always be certai...

Страница 7: ...ing until the breakers are ready for inspection testing and or installation When ready to inspect and install the circuit breaker carefully remove the banding straps and lift off the cardboard box Rem...

Страница 8: ...der the integral molded lifting handles on both sides of the circuit breaker Every effort should be made during lifting to minimize circuit breaker swing and tilt If the circuit breaker is to be lifte...

Страница 9: ...interlocks Doing so and using a lower capacity circuit breaker in an incompatible cassette could result in an electrical fault that could result in death bodily injury and or equipment damage Molded...

Страница 10: ...ails Be certain that the circuit breaker s four molded drawout rail supports are fully seated in the extension rail cutouts on both sides Figure 2 3 Do not remove the lifting yoke from the circuit bre...

Страница 11: ...y Connections Not Made Only Ground Connection Made Breaker Still Behind Door Typical Storage Position Circuit Breaker Side View Compartment Front Door Secondary Connection Made Rear of Compartment Pri...

Страница 12: ...e and ratchet which is not provided Figure 2 9 As long as the levering access door is raised the circuit breaker is held trip free Begin by rotating the levering in screw to the full counterclockwise...

Страница 13: ...it breaker including automatic primary and secondary connections Horizontal stabs and horizontal customer busbar terminals are available as standard Figure 2 11 The cassette terminal connections can b...

Страница 14: ...2 11 Drawout cassette features front and rear views 2 1 4 3 6 5 8 7 1 1 2 2 3 4 5 6 6 7 7 8 9 9 9 10 10 10 4 Front View Rear View Extension Rails Extension Rail Cutout Secondary Plug in Connectors Se...

Страница 15: ...circuit breaker s type secondary connector Both secondary connection devices are mounted at the top front of the circuit breaker The fixed circuit breaker frame has two mounting feet one on each side...

Страница 16: ...may be required or the breaker may have to be de rated Refer to the table Rated currents of the circuit breakers at different ambient temperature presented in this section for de rating information at...

Страница 17: ...res Altitude derating factors Notes IZM series circuit breakers can be applied at their full voltage and current ratings up to a maximum altitude of 2000 meters above sea level When installed at highe...

Страница 18: ...intended to provide a guideline for the installation of fixed type or drawout type circuit breakers in an enclosure The diagram and related dimensions can be used for reference Electrical clearance d...

Страница 19: ...ont and rear views Section 3 Circuit breaker description and operation 3 1 Introduction IZM32 IN32 circuit breakers are available in two physical frame sizes 3 4 poles in both drawout and fixed mounti...

Страница 20: ...6 2 5 9 10 5 2 1 4 3 6 7 8 9 10 Fixed primary terminal with optional vertical adapter Arc chamber Mounting foot Circuit breaker nameplate Tripper bar Baffled arc chute cover Secondary disconnect Facep...

Страница 21: ...cessory windows Trip unit Contact status open close Spring status charged discharged Manual OFF button push Manual ON button push Manual charge handle Optional operation counter Padlockable levering d...

Страница 22: ...case and is electrically isolated and insulated from current contact structures It is covered by an insulating front cover 3 3 Operating mechanism The IZM32 IN32 operating mechanism is based on the pr...

Страница 23: ...to the corresponding instructions leaflet An electrical motor operator that is used to charge the closing spring automatically can be added to a manually operated circuit breaker in the field Figure 3...

Страница 24: ...XR 25 LSIG protection Yes Yes Disable I Yes Yes GF protection Option Option GF alarm Option Option Display Yes Yes Programmable No No Current metering Yes Yes Power energy metering No Yes Power qualit...

Страница 25: ...In rating of the breaker while the value on the battery cover is for reference only when the LCD is not powered The In rat ing displayed on the LCD screen and In rating printed on the frame rating mo...

Страница 26: ...ination on each contact 5 Contact blocks are individually mounted and hence contact positions may be empty depending on accessories and options ordered 6 The tension clamp terminals will support solid...

Страница 27: ...ge air circuit breaker MN013017EN May 2022 www eaton com Section 4 Dimensional drawings IZM32 Fixed Type Dimensions and Horizontal Board Dimensions 3P 800 3200A Front view Right view Top view Section...

Страница 28: ...2 IN32 low voltage air circuit breaker MN013017EN May 2022 www eaton com Section 4 Dimensional drawings IZM32 Fixed Type Dimensions and Horizontal Board Dimensions 4P 800 3200A Front view Right view T...

Страница 29: ...N May 2022 www eaton com Section 4 Dimensional drawings IZM32 Fixed Type Panel Cutout and External Vertical Board Dimensions 3P and 4P 800 1600A Max distance to isolation surface Door cut out Door cut...

Страница 30: ...r MN013017EN May 2022 www eaton com Section 4 Dimensional drawings IZM32 Fixed Type External Vertical Board Dimensions 3P and 4P 2000A Door cut out Door cut out Door panel mounting hole Door panel mou...

Страница 31: ...N013017EN May 2022 www eaton com Section 4 Dimensional drawings IZM32 Fixed Type External Vertical Board Dimensions 3P and 4P 2500 3200A Door cut out Door cut out Door panel mounting hole Door panel m...

Страница 32: ...low voltage air circuit breaker MN013017EN May 2022 www eaton com Section 4 Dimensional drawings ZM32 Withdrawable Type Dimensions 3P and 4P 800 3200A Notes Drawer switch position Recommended minimum...

Страница 33: ...10 11 50 292 10 Note 1 Mperial dimensions are Inches on top metric dimensions are mm bottom 2 All dimensions are reference only 3 Tolerance range is shown as follow Connected position Test position W...

Страница 34: ...Bottom view 2 places 2 places 12 places 4 places 4 places 2 places 4 places 4 places 3 places 4 pole mounting locations 3 pole mounting locations Earth contact access hole Rear view Bottom view Rear v...

Страница 35: ...2 4 25 4 25 4 231 9 Mounting plane 41 6 475 5 152 4 384 2 88 9 88 9 152 4 37 6 10 2 Optional earth bus mounting location replace existing bolts with M8x25 hex bolts for use with 1 4 6mm bus Required m...

Страница 36: ...ker MN013017EN May 2022 www eaton com Section 4 Dimensional drawings IZM32 Withdrawable Type Cassette Horizontal Board Wiring Dimensions 3P and 4P 800 3200A 16 33 5 37 1 127 127 50 8 101 6 11 2 117 50...

Страница 37: ...eaton com Section 4 Dimensional drawings IZM32 Withdrawable Type Cassette Vertical Board Wiring Dimensions 3P and 4P 4000A 127 127 30 5 30 5 123 161 83 3 46 101 6 431 411 101 6 400 57 2 10 9 486 127 1...

Страница 38: ...04 05 06 07 08 09 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90 100 200 300 400 500 600 700 800 900 1000 2000 3000 4000 5000 6000 7000...

Страница 39: ...1 0 3 0 4 1 3 0 5 Time in Seconds Current in Multiples of Long Delay Pickup Ir Notes 1 This curve shown as a multiple of the LONG PU setting Ir The actual pickup point occurs at 110 of the Ir with 5 t...

Страница 40: ...determined by the interrupting rating of the circuit breaker 6 Curves applies from 20 C to 70 C ambient Temperatures above 85 C will cause over temperature trip 7 This curve is for 50Hz 60Hz applicati...

Страница 41: ...ion 2 The peak current level setting for IZM63 is xed at 176kA 4 The PXR will light the Instantaneous LED for a High Instantaneous trip 5 The total Instantaneous clearing times shown are conservative...

Страница 42: ...rmined by the interrupting rating of the circuit breaker 6 Curves applies from 20 C to 70 C ambient Temperatures above 85 C will cause over temperature trip 7 This curve is for 50Hz 60Hz applications...

Страница 43: ...t Rating In 6 The end of the curve is determined by the interrupting rating of the circuit breaker 7 Curves applies from 20 C to 50 C ambient Temperatures above 85 C will cause over temperature trip 8...

Страница 44: ...t be ENABLED via setting Maintenance Mode switch to ON position remote switch or communications for these curves to apply Maintenance Mode is in use being shown by blue LED 4 The PXR will light the In...

Страница 45: ...ance 2 SDPU 1 5x to 10x of Ir have 100 10 tolerance 3 LD Time 0 5s to 24s have 100 0 30 tolerance 4 SD Slope I T The short pickup points have 10 tolerance time setting from 0 1s to 0 5s with steps of...

Страница 46: ...nce time setting from 0 1s to 0 5s with steps of 0 1s except 0 2s tolerance is 100 0 30 except 0 1s has tolerance 100 0 40 5 I r response time value projected to I T line will determine the other brea...

Страница 47: ...This curve shown as a multiple of the LONG PU setting Ir The actual pickup point occurs at 110 of the Ir with 5 tolerance 2 SDPU 1 5x to 10x of Ir have 100 10 tolerance 3 LD Time 0 5s to 24s have 100...

Страница 48: ...On a 4P circuit breaker the neutral current sensor has the same style and wiring method as the phase sensor located within the circuit breaker frame no need to connect the secondary terminals 11N1 12N...

Страница 49: ...he Spring Release internal electronics pulse the SR coil and then provides a high impedance circuit This provides anti pumping 4 When the spring discharges its energy the motor switch will re energize...

Страница 50: ...voltage air circuit breaker MN013017EN May 2022 www eaton com Section 6 Wiring diagrams Under voltage release IZM series circuit breaker Monitored Voltage 94 93 Notes 1 Treated as the positive voltag...

Страница 51: ...Remote Indication Maintenance Mode indication Contact rating 1 A 120 Vac 1 A 24 Vdc and 0 5 A 230 Vac 2 For the PXR20 25 the Alarm 2 is for High Load alarm Ground Fault alarm Contact rating 1 A 120 Va...

Страница 52: ...ximum length of this wiring to remotely arm the switch or alternate relay contact is 63 78 feet 3 m Use 20 AWG wire or larger 4 A remote Stack Light Annunciator panel or other remote indication device...

Страница 53: ...LB LC PT MODULE BREAKER A 0 600 L L INPUT B C To additional breakers 16 max Secondary Contacts 1 N 3 5 30 PTVB 29 PTVA 31 PTVC TP2 32 PTVN LN LA LB LC PT MODULE BREAKER A 0 600 L L INPUT B C To additi...

Страница 54: ...3 Notes 1 Twisted together AWG 14 to 20 copper wire Route the Zone Interlock wiring separate from power conductors DO NOT GROUND any Zone Interlock wiring 2 The maximum distance between two farthest b...

Страница 55: ...ts can be driven into areas such as the breaker mechanism where additional friction sources could create problems Never use a wire brush to clean any part of the circuit breaker 7 3 When to inspect Do...

Страница 56: ...lace the accessory s function Charge the breaker mechanism springs either using the charging handle or the motor operator Close the breaker by applying rated voltage to the spring release accessory an...

Страница 57: ...d by looking directly down into the arc chamber Figure 7 3 and Figure 7 4 A contact wear indicator is provided for each primary contact and indicates whether or not the contact should be replaced Insp...

Страница 58: ...act wear indicator with circuit breaker closed Side to Side Ledge Side to Side Ledge Contact Wear Inspection Area ledge not visible under contacts Contact Wear Inspection Area ledge now becoming visib...

Страница 59: ...nter Circuit breaker makes no attempt to close with either local manual or remote controls springs do not discharge Closing spring not fully charged check SPRING CHARGED indicator Charge spring manual...

Страница 60: ...S WARRANTIES EXPRESSED OR IMPLIED INCLUDING WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY OTHER THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING CONTRACT BETWEEN THE PARTIES ANY SUC...

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