KCC112x Series

KCC112x - AC GENERATOR CURRENT DIFFERENTIAL GUARD
  • Generator Stator earth fault Protection
  • Winding insulation Protection
  • For use with 1A or 5A current transformers
  • The Pathfinder eases fault finding
  • Up to two individual very fast analogue output signals (<50mS), (optional)
  • DIN96 Slave Indicator (scaled 0-40%In) with status LEDs (optional)
Description
KCC112x 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 antiparallelled CTs in a Merz-Price configuration, by comparing current levels at the end of each phase winding.
 
Alarm trip must be set sufficiently high to ensure that generator magnetisation 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. Colour of LEDs indicate alarm status. Alarm LEDs flash during count-down.

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.

User settable trip levels and delays. Colour 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:
  • ALARM
  • WARNING
  • NORMAL
OUTPUTS
Up to two individual very fast analogue output signals (optional) proportional to highest up current. The analogue output is isolated from the CT and auxiliary power.

PATHFINDER FUNCTION
The Pathfinder (only on latching models) indicates the phase causing the trip by flashing pattern of the relevant LED.

Models
KCC112E
KCC112FA  
KCC112FB
KCC112G
KCC112GFA
KCC112GFB
 
 

 

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