The MVR-G257 is a generator differential protectionrelay for large or critical

synchronous generators. It provides voltage and current based protection

functions including differential protection and measurement of all vital values

to be supervised. Furthermore it can connect up to 16 RTD sensors for

thermal alarms and tripping. It comes with 9 avaialable extension slots to

extend the device with additional communication interfaces and I/Os.

10x Current input (configurable 0.2…10A)

4x Voltage input (1.00…480.00V (RMS)

3x Digital input

5x Output relay (4NO, 1CO)

1x IRF output (1CO)

2x Remote com port (1 x RJ45 Ethernet and 1 x RS-485)

– IEC 61850 Ed1. Modbus TCP/RTU, IEC 60870-5-104/103/101. DNP 3.0. SPA protocols

– DT, IEC or ANSI time/overcurrent curves with settable release delays

– 9 extension slots for additional hardware options

– Event recorder (up to 15 000 events)

– Disturbance recorder (up to 100 disturbance records)

– Measuring accuracy can be calibrated to Class 0.2

– Differential Protection