Eaton IZM32 Instruction Manual
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Eaton IZM32 Instruction Manual

Low voltage air circuit breaker
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Instruction Manual MN013017EN
May 2022
IZM32 / IN32 low voltage air circuit breaker
IZM32 / IN32

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Summary of Contents for Eaton IZM32

  • Page 1 Instruction Manual MN013017EN May 2022 IZM32 / IN32 low voltage air circuit breaker IZM32 / IN32...
  • Page 2 This information is also available from the Eaton Web site at of particular equipment, contact the local Eaton www.eaton.com representative. For application information, consult Eaton or see applicable Product Guides, Technical Documents, and Industry Standards. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 3: Table Of Contents

    3-5 Secondary contacts and connection diagrams ........21 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 4 8-1 Introduction ..............55 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 5: Section 1: Introduction

    The inside of the compartment can also be 1-1 General information inspected with the circuit breaker on its extension rails. The IZM32 / IN32 air circuit breaker is a fixed or drawout air circuit breaker design using an electronic tripping system. NOTICE...

  • Page 6: Safety Features

    The individual should be able to de-energize, clear, and tag circuits in accordance with established safety practices. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 7: Section 2: Receiving, Handling, And Installation

    (Figure 2-1). Remove the lag screws and clamps. Save the screws and clamps for future shipment of the breaker. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 8: Lifting Circuit Breaker

    The sensor rating can be viewed through the viewing windows at the rear of the circuit breaker and (Figure 2-2b). Rated current label Figure 2-2a PXR trip unit current rating label IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 9: Adapting Cassette

    Do not disable rejection 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. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 10: Installing Drawout Circuit Breaker

    Not Made Circuit Breaker Out of Compartment On Extension Rails • No Electrical Connections Made • Breaker On Extension Rails • Remove or Inspection Position Figure 2-4 REMOVE position IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 11 Primary Breaker Connections Side View Not Made • Breaker and Trip Unit Testing • Primary Connection Not Made • Secondary and Ground Connections Made Figure 2-6 TEST position IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 12: 2-7.2 Levering Circuit Breaker

    Discharge Figure 2-8 Cassette label showing disconnected, test, takes place between the DISCONNECT and the TEST and connected position of recessed cover position. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 13 Mounting locations for cell (TOC) switches, safety shutters, mechanical interlocks, and key interlocks are provided on the cassette. Figure 2-9 Drawout circuit breaker cassette Figure 2-10 Drawout circuit breaker with automatic primary disconnects IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 14 Secondary Terminal Blocks Arc Hood Optional Cell (TOC) Switch Optional Key Interlock Earthing Bar Open Safety Shutters Primary Terminals (Rear View) Figure 2-11 Drawout cassette features (front and rear views) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 15: Fixed Circuit Breaker

    (Figure 2-14). Circuit breakers should be operated manually and/or Optional vertical primary adapters are available for different electrically before they are put into service. This can be bus configurations. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 16: Technical Data

    Bus bar dimensions The bus bar sizes are shown in the table below. This table uses data specified by IEC 60947-1 or obtained by Eaton in their circuit breaker testing. They are 3-meter-long bus bars with the faces vertical and painted flat black. For other bus bar configurations, larger bus bar sizes may be required or the breaker may have to be de-rated.
  • Page 17 Derating factors IZM32 / IN32 circuit breakers can be applied at their full voltage and current ratings up to a maximum attitude of 2000 meters above sea level. When installed at higher attitudes, the ratings are subject to correction factors. Rated short-circuit current is not affected as long as the voltage is rated in accordance with the table below.
  • Page 18 Recommended enclosure/ventilation opening dimensions Width of cassette + 75 mm Width 550 mm Height 450 mm (front control panel bay) Depth 320 cm² (4000-6300A) Ventilation holes Rear or lower vent IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 19: Section 3: Circuit Breaker Description And Operation

    Circuit breaker nameplate Baffled arc chute cover Secondary disconnects (contacts) Faceplate (front cover) Drawout rail supports Integral lifting handle Figure 3-1 Typical drawout circuit breaker features (front and rear views) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 20 Tripper bar Baffled arc chute cover Secondary disconnect Faceplate (front cover) Integral lifting handle Fixed horizontal primary terminal Figure 3-2 Typical fixed circuit breaker features (front and rear views) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 21 Manual ON button (push) Trip unit cover. Plastic cover is provided which allows the settings to be viewed but not changed. Figure 3-4 Typical standard drawout circuit breaker front cover IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 22: Basic Circuit Breaker Assembly

    Electric charging motor Manual charge handle Operations counter (optional) Padlockable levering device access door Breaker position indicator Figure 3-6 Electrically operated drawout circuit breaker with front cover removed IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 23: 3-3.1 Manual Operation

    Motor operator installed Figure 3-7 Electrical motor operator to charge closing Figure 3-8 Charging motor can be installed in the field spring (installed) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 24: Electronic Tripping System

    USB port on the trip unit. Please contact your Eaton sales representative for details on proper re-programming of the trip unit. Figure 3-9 Installed PXR trip unit IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 25: 3-4.5 Trip Actuator

    50 52 54 56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 Figure 3-10 Secondary connector top view IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 26: Secondary Contacts And Connection Diagrams

    8. The tension clamp terminals also support finely stranded conductors with wire-end ferrules and plastic Figure 3-13 AMP secondary wiring removal tool collars DIN 46228/4, rated connection. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 27: Section 4: Dimensional Drawings

    Section 4: Dimensional drawings Section 4: Dimensional drawings IZM32 Fixed Type Dimensions and Horizontal Board Dimensions (3P, 800~3200A) Front view Right view Top view IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 28 Section 4: Dimensional drawings IZM32 Fixed Type Dimensions and Horizontal Board Dimensions (4P, 800~3200A) Front view Right view Top view IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 29 Section 4: Dimensional drawings IZM32 Fixed Type Panel Cutout and External Vertical Board Dimensions (3P and 4P, 800~1600A) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 30 Section 4: Dimensional drawings IZM32 Fixed Type External Vertical Board Dimensions (3P and 4P, 2000A) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 31 Section 4: Dimensional drawings IZM32 Fixed Type External Vertical Board Dimensions (3P and 4P, 2500~3200A) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 32 Section 4: Dimensional drawings ZM32 Withdrawable Type Dimensions (3P and 4P, 800~3200A) Drawer switch position Recommended minimum mounting space Notes: IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 33 Section 4: Dimensional drawings IZM32 Withdrawable Type Panel Cutout Dimensions (3P and 4P, 800~4000A) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 34 Section 4: Dimensional drawings IZM32 Withdrawable Type Cassette Dimensions and Mounting Dimensions (3P and 4P, 800~3200A) IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 35 Section 4: Dimensional drawings IZM32 Withdrawable Type Cassette Dimensions and Mounting Dimensions (3P and 4P, 4000A) 432(3P);559(4P) 559(3P);686(4P) ø12.4 ø12.4 2 places 2 places ø11 ø11 4 places 4 places 384.2 384.4 ø11 ø11 4 places 4 places 10.2 Mounting Mounting plane 37.5...
  • Page 36 Section 4: Dimensional drawings IZM32 Withdrawable Type Cassette Horizontal Board Wiring Dimensions (3P and 4P, 800~3200A) 37.1 33.5 50.8 11.2 101.6 37.1 33.5 50.8 11.2 101.6 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 37 Section 4: Dimensional drawings IZM32 Withdrawable Type Cassette Vertical Board Wiring Dimensions (3P and 4P, 4000A) 101.6 101.6 83.3 30.5 30.5 10.9 57.2 101.6 101.6 83.3 30.5 30.5 10.9 57.2 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 38: Section 5: Protective Characteristic Curves

    3000 2000 1000 Current in Multiples of Long Delay Pickup (I Notes: 1. Short slope: Flat, the actual pickup point has 100% ±10% tolerance. 2. Long delay I² IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 39 I²T line will determine the other break point and shape of the curve. 6. If long delay thermal memory is enabled, trip times may be shorter than indicated in this chart. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 40 8. These curves are comprehensive for series IZM circuit breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 41 Instantaneous Asymmetrical Peak Current (kA) Notes: 1. Fixed High Instantaneous Trip function is provided in the circuit breaker for Series IZM32 set to pickup at 90kA. Instantaneous peak current level. The tolerance is 100% ±10% as the pickup points. 2. The peak current level setting for IZM63 is fixed at 176kA.
  • Page 42 8. These curves are comprehensive for series IZM breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 43 8. This curve is for 50Hz ,60Hz applications. 9. These curves are comprehensive for series IZM32/IZM63 circuit breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current.
  • Page 44 8. These curves are comprehensive for series IZM circuit breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 45 10. These curves are comprehensive for series IZM circuit breakers including all frame sizes, ratings, and constructions. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 46 I²T line will determine the other break point and shape of the curve. 6. If long delay thermal memory is enabled, trip times may be shorter than indicated in this chart. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 47 6. If long delay thermal memory is enabled, trip times may be shorter than indicated in this chart. The total clearing times shown include the response time for trip unit, the breaker opening and the interruption of the current. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 48: Section 6: Wiring Diagrams

    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, 12N2 IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 49 C22-L-R-230. For 24 Vdc application, use C22-L- R-24. Remove the white (22 mm [0.89 in.]) diameter pilot light) Light Diffuser from the assembly to give better indication of voltage present. Activate the push-button to trip the circuit breaker. See Eaton for other voltages.
  • Page 50 Section 6: Wiring diagrams Under voltage release Monitored Voltage ① IZM series circuit breaker Notes: 1. Treated as the positive voltage for DC ratings. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 51 3. For the PXR20/25, the Alarm 3 is for Trip N.O. contact. Contact rating 1 A @ 120 Vac, 1 A @ 24 Vdc, and 0.5 A @ 230 Vac. 4. If the control voltage is +24 Vdc, the trip unit should be fed from a separate, galvanically isolated + 24 V voltage dc supply. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 52 Section 6: Wiring diagrams Maintenance mode wiring IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 53 Contacts 32 PTVN MODULE 31 PTVC 30 PTVB 29 PTVA To additional breakers (16 max) BREAKER IZM circuit breaker - 3 pole or 4 pole - 4 wire IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 54 Section 6: Wiring diagrams Zone interlock wiring IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 55: Section 7: Inspection And Maintenance

    Make appropriate corrections to anything breaker mechanism, where additional friction sources could found out of order. create problems. Never use a wire brush to clean any part of the circuit breaker. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 56: 7-4.1 Functional Field Testing

    Verify whether the indicator (if so equipped) is popped out and then reset it. Reset the blinking red LED on the trip unit by pressing the Reset/Battery Test pushbutton. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 57: 7-4.3 Primary Contact Inspection

    Failure to do this could result in equipment damage, bodily injury, or even death. Once the inspection is completed, be sure to put the arc chutes back to its original place. IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...
  • Page 58 Contact Wear Indicator— Contact Wear Indicator— Contacts Closed and in Good Condition Contacts Closed and Wear is Indicated Figure 7-5 Use of contact wear indicator with circuit breaker closed IZM32 / IN32 low voltage air circuit breaker MN013017EN May 2022 www.eaton.com...

  • Page 59: Section 8: Troubleshooting

    Possible problems associated with the electronic trip unit are covered in PXR20/25 instructions manual. If the problem cannot be resolved with the aid of one or both of these guides, contact the Eaton service center for more in-depth assistance. Table 8.1 Circuit breaker troubleshooting guide.
  • Page 60 BETWEEN THE PARTIES. and safety notations in this document are based on In no event will Eaton be responsible to the purchaser Eaton experience and judgment, and may not cover all or user in contract, in tort (including negligence), strict contingencies.

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