Current Protection

2C63 Definite Time Current Check Relay



  • 10:1 PU setting ranges. Select from two options: 5 - 50% or 20 - 200% of nominal input current
  • 1A or 5A nominal CT’s
  • Fast reset times (less than 15ms at 20x setting, repeated offset)
  • <5% transient over-reach
  • 2 N/O & 2 N/C time delayed output contacts
  • 3 extra configurable C/O contacts (Time delayed or inst. phase segregated)
  • 0 to 99s time delayed output with +0.5% accuracy
  • Time settings easily selected by digital thumb wheel switches
  • Timing in progress LED
  • Optional internal timer initiate input logic
  • Hand & remote flag reset
  • 40-300V DC auxiliary supply Power supply fail relay drops out if the Auxiliary supply fails.
  • Optional 20-70V DC supply
  • Size 4M draw out case


The 2C63 Series relays are adjustable AC current sensing relays designed for high or low voltage power systems where they can be used in a large number of vercurrent applications.

Definite time overcurrent relays offer advantages over inverse time protection in power systems which have a wide variation in source impedance. Faults can be cleared in relatively short times irrespective of the magnitude of the fault current, & coordination of several relays in a system can be obtained at all times regardless of fault current variation.

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