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Numerical Single Function Relays : Genesis->
Numerical Biased Differential Protection Relay Type : MIB 202


MIB 202 takes the current inputs from both the ends of two winding power transormer and auto transformer, it is working on current differential principle. It provides stability against magnetic inrush conditions. Load/through fault stability is achieved through bias setting provided in the relay. It operates only for internal faults.


  • Two winding power transformers
  • Auto transformers
  • Biased differential protection for generators


Standard Features
Numerical, true RMS measurementBoth 1A & 5A CT inputs in one relay
Both DC & AC auxiliary supply availableDrawout modular case (150X151mm cutout )
Compact designNon-volatile memory for trip indication
Self-monitoring facility7 segment LED display
Status indication LEDsSealable front cover to prevent unauthorised access
Biased differential (87)Instantaneous differential highset
Integral current amplitude multiplier & vector group compensationNo auxiliary C.Ts required
3-slope adjustable bias settingImmune to magnetic inrush
5 output contacts
pdtspec4_01(MIB 202).pdf

Writing Diagrams

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