KCV12x - NEUTRAL DISPLACEMENT AC EARTH FAULT GUARD
- Insulation monitoring and Earth Fault Protection of live non-grounded low or high tension AC supplies
- Direct connection to Neutral in up to 690VAC supply networks
- Triple relay operation gives more flexibility
Up to two individual very fast analogue output signals (<50mS), (optional)- DIN96 Slave Indicator with status LEDs (optional)
Description
KCV12x is a digitally controlled two-level trip relay monitoring the
insulation status of a live AC system, by detecting the displacement of
the voltage between the supply system neutral point and PE.
The level of neutral point voltage will depend on the level of earth
fault between each line voltage and PE. In a fault free system the
voltage will be nil, if one line voltage is grounded to PE the voltage
may increase to Vn/√3 (approx. 400V for a 690V system).
KCV12x is available for direct connection to nominal 115, 230, 440
or 690VAC system voltage, with 100, 200, 400 or 500V meter range
respectively. Use 115V input for transformer connection to higher
voltage.
The standard models takes the auxiliary supply voltage terminal 1 & 2.
It can also be delivered with optional separate DC auxiliary voltage
(terminal 26 & 27), but that must be specified when ordering.
User settable trip levels and delays. Colour of LEDs indicate alarm status. Alarm LEDs flash during count-down.
Start of monitoring function is delayed when power is switched on
(default 2 secs delay). In this way false tripping during power up is
avoided.
The optional slave meter reads the neutral point voltage, and has
low-reflection glass to ease reading at a distance. Scale will depend on
measuring voltage input and can be customized to nearly any scale.
OUTPUTS
Up to two individual very fast analogue output signals (optional)
proportional to monitored parameters. This may be used as an input to a
control system, to detect abnormal conditions. If output is used for
remote meter reading, we recommend 0-1mA for the slave indicator.
RELAY OUTPUTS
Relay operation depends on the selected model. Other combinations are available on request.
Models
KCV12E
KCV12FA
KCV12FB
KCV12G
KCV12GFA
KCV12GFB
