KPC112 Current Differential Protection / Ground Fault Protection, Analog Output

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Current Differential Protection / Ground Fault Protection
KPC112x Brochure




  • Generator Stator Ground Fault Protection
  • Winding insulation Protection
  • “Pathfinder” function eases faultfinding
  • For use with 1A or 5A current transformers
  • Very fast analogue output (<50mS), (F-version)
KPC112E protects against phase-, earth- and winding faults within the protected area (the stator) of large AC generators. It detects even minute insulation punctures, flash-over carbon deposits and contamination. The unit measures highest up differential current from anti-paralleled CTs in a Merz-Price configuration, by comparing current levels at the end of each phase winding..
R1 is used for early warning. R2 or R3 (fail safe) is to be used for generator breaker trip, the “other” alarm relay can be used for local indication input to PMS, alarm system etc.
Alarm trip must be set sufficiently high to ensure that generator magnetization current does not cause tripping. The alarm delay is to be set so that the initial inrush current have returned to normal level before the delay period elapses. The warning trip level and delay can be set as required to give early warning.
User settable trip levels and delays. Color of LEDs indicates alarm status. LEDs flash during count-down. The meter and the triple-zone status LEDs at a glance gives the clear safety message:
The KPC112F-versions have a fast response mA output signal proportional to highest up current.
The “Pathfinder” function identifies the phase(s) causing the trip by the flashing pattern of the relevant LED(s).

Additional information

Weight 2 lbs
Dimensions 9 × 9 × 9 in

KPC112E Current Differential / Ground Fault Protection, without Analog Output, KPC112F Current Differential / Ground Fault Protection, with Analog Output

Aux Supply

100-120VAC Aux Supply, 200-240VAC Aux Supply, 380-415VAC Aux Supply, 440-480VAC Aux Supply, 12-24VDC Aux Supply, 48VDC Aux Supply, 110VDC Aux Supply

Analog Output

No Analog Output, 0-10mA Analog Output, 0-20mA Analog Output, 4-20mA Analog Output, 0-10VDC Analog Output

Current Input

1A, 5A