Low-voltage Insulation Monitoring System i-moni

System configuration examples

Product Lineup

	N: No earth leakage relay function F: Panel-mount type	N: No earth leakage relay function B: Built-in type	R: With earth leakage relay function F: Panel-mount type	R: With earth leakage relay function B: Built-in type
1-circuit models	ZE-1NF	ZE-1NB	ZE-1RF	ZE-1RB
2-circuit models	ZE-2NF	ZE-2NB	ZE-2RF	ZE-2RB
6-circuit models	ZE-6NF3 (DE-6AB required for analog output)	ZE-6NB3 (DE-6AB required for analog output)	ZE-6RF3 (DE-6AB required for analog output)	ZE-6RB3 (DE-6AB required for analog output)
10-circuit models	ZE-10NF3 (DE-10AB required for analog output)	ZE-10NB3 (DE-10AB required for analog output)	ZE-10RF3 (DE-10AB required for analog output)	ZE-10RB3 (DE-10AB required for analog output)

4000 mA made-to-order models

We offer made-to-order products that can measure up to 4000 mA.
Model description F: Panel-mount type　B: Built-in type

• 4000 mA models with earth leakage relay are not available.

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  ZE-1NF-4A

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  ZE-1NB-4A

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  ZE-2NF-4A

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  ZE-2NB-4A

Optional units and ZCTs

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  Analog output unit

  • DE-6AB (for 6 circuits)
  • DE-10AB (for 10 circuits)

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  Through-hole type ZCTs (non-split)

  • ZR-15
  • ZR-30B
  • ZR-58B
  • ZR-65
  • ZR-80
  • ZR-100
  • ZR-120

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  ZCTs with primary conductor (non-split)

  • Z-400B(3P)
  • Z-600B(3P)
  • Z-800B(3P)
  • Z-1000B(3P)
  • Z-1200B(3P)
  • Z-2000B(3P)
  • Z-400B - 2000B(4P)

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  Split ZCTs

  • ZE-30
  • ZE-52
  • ZC-65 (*Cannot be combined with a unit with earth leakage relay function)
  • DM-55B
  • DM-70B
  • DM-100B

ZCT Integrated Circuit breakers

ZCT-Equipped Circuit Breakers Designed for Easy Integration

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• While the dimensions of the current products are smaller than those of the former models, attachments for compatibility with the model in use are available, allowing for flexible mounting positions.

Updated circuit breakers: Supporting customers’ businesses through more efficient equipment replacement

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Types with built-in earth leakage relay function

Low-voltage insulation monitoring unit + Multi-channel earth leakage relay

Low-voltage insulation monitoring unit with earth leakage relay function

The current detection method of the earth leakage relay section is the Io method, not Ior.
The standards for earth leakage relays conform to JIS C 8374:1991.

• A ZCT is required for each circuit to be detected.One ZCT per circuit monitors insulation and detects leakage, with three relay output contacts per circuit (for caution, alert, and earth leakage relay).

Application example: Insulation monitoring is desired and leakage tripping function is also required

Compared to the conventional method, installation space for earth leakage relays is eliminated, which can significantly save on installation costs.
One ZCT per circuit can be used for insulation monitoring and earth leakage relay.

• 400 V system circuit
• Wet location
• Damp location (Article 15 of the Ministerial Ordinance on Technical Standards for Electrical Equipment)

Application example: Upgrading of the current multi-channel earth leakage relay to insulation monitoring is desired

Cost-saving functional upgrades are possible according to the circuit.

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  Low-voltage insulation monitoring unit with earth leakage relay function

  Circuits with obligation to install an earth leakage trip device

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  Low-voltage insulation monitoring unit

  Circuits with no obligation to install an earth leakage trip device

Related Information (Japanese Only)