Home Products Protection Relays DRAGON 1RFI 401D1 Multifunction directional overcurrent & ground fault protection

RFI 401D1 Multifunction directional overcurrent & ground fault protection

RFI 401D1 is a powerful Protection & Control IED for Medium voltage feeders, but is also suitable for a main or back-up protection of HV lines, Grid connections, Power transformers, Capacitor banks and other primary equipment. In case of Transformer back-up protection Restricted Earth fault function for the internal transformer earth faults clearance is available.

RFI 401D1 can be used for all kinds of neutral grounding – solidly/resistance earthed, isolated and compensated networks. The relay is suitable for radial and ring type networks.

The protection can be applied with all types of current transformers – iron-core and linearized (Rogowski coil).

RFI 401D1 consists of IED type of DRAGON 1 and additional I/O module type of RTB-2. 

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

  • Three stages directional/non-directional definite time/instantaneous overcurrent protection
  • Directional/non-directional Inverse time overcurrent protection with 12 inverse time characteristics
  • Three stages directional/non-directional definite time/instantaneous ground fault protection
  • Directional/non-directional Inverse time ground fault protection with 12 inverse time characteristics
  • Definite time undercurrent protection
  • Negative Sequence overcurrent protection
  • Phase discontinuity protection
  • Conductance / susceptance ground fault protection
  • High harmonic content ground fault detection
  • Restricted earth fault protection
  • Three stages definite time over voltage protection
  • Three stages definite time under voltage protection
  • Two stages negative sequence over voltage protection
  • Two stages positive sequence under voltage protection
  • Wattmetric / Varmetric power ground fault protection
  • Directional overpower protection
  • Directional underpower protection
  • Three stages neutral voltage displacement
  • Four stages definite time over frequency protection
  • Four stages definite time under frequency protection
  • Four stages definite time rate of change of frequency protection
  • Thermal overload protection
  • Voltage vector shift protection
  • Arc protection
  • Second harmonic blocking (inrush restraint)
  • Cold load pickup
  • Autoreclosing
  • Voltage circuits supervision
  • 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

 

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Note: All flyers are subject to regular update.