Mitsubishi Electric NV earth leakage circuit breakers (ELCB) are molded case circuit breakers for low-voltage AC circuits that provide electric shock protection and prevent fires from leakage current. The range runs from 32 A to 800 A frames to IEC 60947-2 Annex B.

What is a Mitsubishi NV ELCB?

• A breaker with an integrated ground fault detector, tripping device and switch mechanism in an insulated body.
• Automatically shuts off the current in the event of a ground fault.
• Conforms to IEC 60947-2 Annex B.
• NV is the Mitsubishi model code for ELCBs.

How does the NV avoid nuisance tripping?

• DPDC surge discrimination: the breaker operates only when the ground fault current polarity alternates for a set time, so it does not trip incorrectly at a lightning surge.
• Digital filter to reduce nuisance operation caused by high harmonics or surge, for example in inverter circuits.
• CE/UL NV models up to 250 A have Type A leakage characteristics.

Which sensitivity settings are available?

• Rated sensitivity 15/30 mA high-speed types.
• 100/200/500 mA switchable types.
• Available settings depend on the model.

Which WS-V models cover frames up to 250 A?

• NV-C: NV63-CV, NV125-CV, NV250-CV
• NV-S: NV32-SV, NV63-SV, NV125-SV, NV125-SEV, NV250-SV, NV250-SEV
• NV-H: NV63-HV, NV125-HV, NV125-HEV, NV250-HV, NV250-HEV

Which WS models cover 400 A to 800 A frames?

• NV-C: NV400-CW, NV630-CW
• NV-S: NV400-SW, NV400-SEW, NV630-SW, NV630-SEW, NV800-SEW
• NV-H: NV400-HEW, NV630-HEW, NV800-HEW

Related products

• Mitsubishi Circuit Breakers
• Molded Case Circuit Breakers (MCCB) NF
• NF-MB Motor Protection Breakers

Contact TKK for model selection or a quotation for your machine.