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Numerical Feeder Protection Relay – GK21R & GK212

Next-Gen Protection and control of Over head Feeder Lines

GK21R and GK212 are dedicated feeder protection relays perfectly aligned for protection, control, measurement, and supervision of the overhead lines. In the event of a fault, it must be prevented from spreading to healthy parts of the network, and the location of the fault has to be identified to ensure safety for everyone. 

GK Power, an RDSO-approved leading manufacturer in India, offers a numerical feeder protection relay at the industry’s latest technology. Enhanced safety by reducing hazards with safety-conscious testing of IEC 60255-1, IEC 60255-26, and IEC 60255-27, this relay unleashes its own full potential of working in hard environments with ingress protection of IP54.


Feeder protection for overhead lines of 25 kV and 2X25 kV systems for Indian Railways with respect to the below


Protection Function

  • 3 Zone Distance Protection (21)
  • Zone-1 Extension Protection
  • Three-stage over-current protection
  • Wrong Phase Coupling (WPC)
  • Auto-Reclose Protection
  • PT Fuse Fail Protection
  • Switch On to Fault Protection (SOTF)
  • Regenerative current protection
  • Thermal Overload Protection
  • Breaker Fail Protection (LBB)
  • Trip Circuit Supervision (TCS)
  • AP/GP low alarm
  • AP/GP low trip and lock

Product benefits

  • Our relays are available with selectable communication protocols such as IEC 61850 and IEC 60870-5-103 for SCADA communication through RS485 and RJ45 ports available on the rear side.
  • 50 cycles of actual waveform are stored in the built-in memory with date-time stamping for fault analysis.
  • Self-diagnostic feature for continuous monitoring of the internal hardware and alarm generation in case of failure of any critical components.
  • Ready to install at 25 kV Traction Transformer, 2×25 kV Scott connected and V connected Transformer & Feeder Panels at TSS

Product features

  • Drawout design
  • 20 x 4 LCD Alpha Numeric Display with Backlight Control and 10 Status Indication LEDs.
  • 5 Keys for Settings and Navigation, Individual Keys for Read/Record, LED Reset, and Hardware Reset