The digitally controlled KCV233x and KCV234x provide precision (0.5% repeatability) high/low line voltage and phase voltage protection respectively to any three phase generator or motor.
A digitally controlled voltage window discriminator controls operation and delay of the voltage low/high alarm relays. The unit measures the zero point crossing and the true r.m.s. voltage value, and accuracy is independent of any wave form distortion.
The standard models takes the auxiliary supply voltage from the monitored voltage (terminal 1 & 2). It can also be delivered with optional separate AC or DC auxiliary voltage (terminal 26 & 27), but that must be specified when ordering (see page 3 for ordering code for separate Aux. Supply).
User settable trip levels and delays (definite time 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 DIN-rail mounted instrument will view the highest up of the three phases directly in Volt. The optional slave volt-meter and the triple-zone status LEDs at a glance gives the clear safety message:
- HIGH (Over Voltage)
- NORMAL
- LOW (Under Voltage)
Red alarm lamps U/V (under voltage) and/or O/V (over voltage) flash instantly (approx. 1 flash per secs) on passing the lower and/or upper voltage differential set points. The lamp changes state and the trip relay operates after the pre-set delay. If a fault condition ends during the delay interval, the timer will automatically reset.
The voltage differential set points can be user-adjusted to suit most applications. Trip levels and delays are settable on unit front. Operation of the status trip relay is inverted (fail safe), i.e. the relay is energised during normal conditions. If one phase voltage is below the low trip level and, simultaneously, another phase voltage exceeds the high trip level then all three relays will operate.
PATHFINDER FUNCTION
The Pathfinder function identifies the phase(s) causing the trip by the flashing pattern of the relevant LED(s).
OUTPUTS
Up to two individual very fast analogue output signals (optional) proportional to Volt range. 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.
Description
KCV233E - KCV233FA - KCV233FB - KCV233G - KCV233GFA - KCV233GFB (3 Phase, 3-wire system)
KCV234E - KCV234FA - KCV234FB - KCV234G - KCV234GFA - KCV234GFB (3 Phase, 4-wire system)
Over and under voltage protection with a third relay (R3) that operates if either the over voltage relay (R2) and/or under voltage relay (R1) operate.
A timer will reset if fault is removed during count-down. Fixed hysteresis prevents relay "chatter" (*only on non-latch models).
Full functionality control during power-up/power-down, with 500mS power-out reservoir.
KCV233B - KCV233BFA - KCV233BFB - KCV233BG - KCV233BGFA - KCV233BGFB (3 Phase, 3-wire system)
KCV234B - KCV234BFA - KCV234BFB - KCV234BG - KCV234BGFA - KCV234BGFB (3 Phase, 4-wire system)
Over and under voltage protection with a third relay (R3) that operates if either the over voltage relay (R2) and/or under voltage relay (R1) operate.
A timer will reset if fault is removed during count-down. Fixed hysteresis prevents relay "chatter" (*only on non-latch models).
Full functionality control during power-up/power-down, with 500mS power-out reservoir.
KCV233C - KCV233CFA - KCV233CFB - KCV233CG - KCV233CGFA - KCV233CGFB (3 Phase, 3-wire system)
KCV234C - KCV234CFA - KCV234CFB - KCV234CG - KCV234CGFA - KCV234CGFB (3 Phase, 4-wire system)
Over and under voltage protection with a third relay (R3) that operates if either the over voltage relay (R2) and/or under voltage relay (R1) operate.
A timer will reset if fault is removed during count-down. Fixed hysteresis prevents relay "chatter" (*only on non-latch models).
Full functionality control during power-up/power-down, with 500mS power-out reservoir.
Can be delivered with only separate aux supply.
