Home Products Protection Relays DRAGON 1RMI 402D1 Multifunction overcurrent and motor differential protection

RMI 402D1 Multifunction overcurrent and motor differential protection

RMI 402D1 is designed as a main Protection & Control IED for large (> 2 MW) asynchronous and synchronous Motors. Depending on the requirements RMI 402D1 can be used also as a basic generator protection unit.

The protection is suitable for all types of current transformers - iron-core and linearized (Rogowski coil).

RMI 402D1 is comprised of two devices (main and auxiliary connected via optical interface) for installation of the both sides of the motor.

 

 

 

 

 

 

 

 

 

All relay protection functions meet ANSI and IEC standards’ requirements:

  • Motor differential protection
  • Motor differential protection high stage
  • Starting time supervision
  • Number of starts limitation
  • Stalled Rotor Protection function
  • Loss of load protection
  • Cooling failure protection
  • Three stages non-directional definite time/instantaneous overcurrent protection
  • Non-directional Inverse time overcurrent protection with 12 inverse time characteristics
  • Three stages non-directional definite time/instantaneous ground fault protection
  • Non-directional Inverse time ground fault protection with 12 inverse time characteristics
  • Definite time undercurrent protection
  • Negative Sequence overcurrent protection
  • Phase discontinuity protection
  • Thermal overload protection
  • Arc protection
  • Breaker failure protection
  • Clockwise and anticlockwise phase rotation function
  • Trip circuits supervision
  • Current circuits supervision functions
  • Circuit breaker life time monitoring

Automation and remote control functions

Disturbance (Fault) Recorder

  • Sampling rate – 1 kHz/4kHz
  • User defined trigger conditions and records duration
  • Recording mode -overwrite (ring buffer) or saturate
  • Each sample consists of instantaneous values of all analog and digital values

Event Recorder

  • Up to 1000 records
  • Each event consists of information about the event’s type, some additional data (such as pick-up current, voltage, the time elapsed and so on) and the time stamp of the event (year, month, day, hour, minute, second, millisecond)
  • Recording mode - overwrite

Protocols

  • Configuration tool - ROCON MMI protocol
  • SCADA communication - IEC 60870-5-103, MODBUS

Configuration, setting and administration

Options

  • Optional extension with I/O modules type of RTB-1

 

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Note: All flyers are subject to regular update