KCC110x Series

KCC110x - AC CURRENT IMBALANCE GUARD
  • 2-level AC Current Imbalance Protection
  • True RMS measurement not affected by heavily distorted waveforms
  • 3 or 4-wire systems. Definite time trip delays
  • 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
The digitally controlled KCC110x monitor and convert the three current transformer (CT) inputs into a signal proportional to the difference between the HIGHEST and the LOWEST input level.

The difference (imbalance) is displayed as a percentage of the CT rating. 1A secondary class 0.5 transformers should preferably be used. The standard scale range is 0 to 40%CT. The warning and alarm trip relays are settable over the same range.

User settable trip levels and delays. Colour of LEDs indicate alarm status. LEDs flash during count-down.

OUTPUTS
Up to two individual very fast analogue output signals (optional) proportional to a range. 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.

Relay Configurations
The warning and alarm trip relays are settable over the same range. R1 is used for early warning. R2 (fail safe) can be used for generator breaker trip. R3 can be used for local indication, input to PMS, alarm system etc.

Alarm trip must be 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.

The relay operation is delayed in the arrow direction. Both trip levels can Independently and individually set over the scale range (0-40% of CT range). The reset is instantaneous.

Models
KCC110E
KCC110FA  
KCC110FB
KCC110G
KCC110GFA
KCC110GFB

 

 

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