Overcurrent Relay NR-100
- power transformers protection in substations 10(20)/0,4kV,
- auxiliary supply transformer protection in medium voltage switchgears
- power supply from current inputs or auxiliary power supply
- overcurrent relay with inverse characteristics I2t
- numerical signal processing
- high accuracy of the trip characteristics
- relay test via auxiliary winding
- wide measuring range from 2In to 60 In
- wide trip time range from 10ms to several hours
- pulse train for actuator drive ensures safe trip in case of the circuit breaker failure
- selftest function, local and remote availability signalization
- small dimensions according to DIN 43700 standard for embedded instruments
Overcurrent Relay NR-300
- power transformers protection in substations 10(20)/0,4kV,
- protects power transformers of all standard powers (50 – 2000 kVA)
- power supply from current inputs or auxiliary power supply
- overcurrent relay with L, S trip characteristics (Long time delay, Short time delay)
- numerical signal processing
- high accuracy of the trip characteristics
- relay test via auxiliary winding
- wide measuring range from 0,8 to 70 In
- wide trip time range from 30ms to several hours
- pulse train for actuator drive ensures safe trip in case of the circuit breaker failure
- remote trip (option), selftest function
- small dimensions according to DIN 43700 standard and direct mounting in the medium voltage switchgear