Mikro's cost-effective earth fault relays comprehensively detect and activate trip protection to medium and low voltage applications. The series of earth fault relays are microprocessor-based numerical relays and are housed in resilient mounted casing. The high end model, MK232A includes five selectable IDMT characteristic curves which provide multiple matching protection characteristics curve for different load types.

 

Key Benefits

  • Accurate, reliable and more resistant to vibration and shock than traditional electromechanical relays
  • Current measurement based on fundamental frequency, prevents nuisance tripping
  • Programmable relay outputs
  • Complies with IEC 60255-26 standards

 

Applications

  • Feeder incoming protection
  • Outgoing protection
  • Busbar protection


EFR

Numerical microprocessor based Earth Fault Relay


EFR

Ordering Information

 

Model

Description

NX231A - 240A

For 50 Hz system, auxiliary voltage 198 ~ 265 V AC

NX231A - 110A

For 50Hz system, auxiliary voltage 94 ~ 127 V AC

NX231A - 240A6

For 60Hz system, auxiliary voltage 198 ~ 265 V AC

NX231A -110A6

For 60Hz system, auxiliary voltage 94 ~ 127 V AC

NX232A - 240A

For 50 Hz system, auxiliary voltage 198 ~ 265 V AC

NX232A - 110A

For 50Hz system, auxiliary voltage 94 ~ 127 V AC

NX232A - 240A6

For 60 Hz system, auxiliary voltage 198 ~ 265 V AC

NX232A - 110A6

For 60Hz system, auxiliary voltage 94 ~ 127 V AC

NX201A - 240A

For 50 Hz system, auxiliary voltage 198 ~ 265 V AC

NX201A - 110A

For 50Hz system, auxiliary voltage 94 ~ 127 V AC

NX202A - 240A

For 50 Hz system, auxiliary voltage 198 ~ 265 V AC

NX202A - 110A

For 50Hz system, auxiliary voltage 94 ~ 127 V AC