KCVA18x - AC REVERSE POWER OVERLOAD GUARD
- Precision Reactive Power Overload Protection, not affected by heavily distorted waveforms
- Total processing time less than 50mS
- 3 or 4-wire systems. Definite time trip delays
- Triple relay operation gives more flexibility
Up to two individual very fast analogue output signals (<50mS), (optional)- Wide range setting of high overload contact hysteresis
- DIN96 Slave Indicator with status LEDs (optional)
Description
The digital controlled KCVA18x range provides precision (1.0%) reactive power overload protection and monitoring of three phase generators or motors.
Available for 3-phase 3-wire (2R3) and 4-wire (3R4) systems.
The unit measures the voltage and current true r.m.s. 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. 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 reads the power level directly in kVAr. The optional slave watt-meter and the triple-zone status LEDs at a glance gives the clear safety message:
Outputs
Up to two individual very fast analogue output signals (optional)
proportional to kVArr range. This may be used as an input to a control
system, to detect abnormal power conditions (loss of excitation etc). 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
KCVA181E - KCVA181FA - KCVA181FB
Configuration: 3-Phase, 3-Wire (2R3)
Both relays can be used for non-essential load release or as a start/stop signal to a standby generator etc.
A wide range overload contact hysteresis can be set to enable R2
to be used for a non-essential load to be reconnected or as a standby
generator stop signal. Relay R3 is an additional relay that can be used
for local indication, as an input to an alarm system etc.
A trip LED flashes when the trip level is passed, the relay
trips when the delay has elapsed. The timer resets if the fault is
removed during countdown. The High/Low relays can be used to regulate
power in AC systems.
KCVA184E - KCVA184FA - KCVA184FB
Configuration: 3-Phase, 4-Wire (3R4)
Both relays can be used for non-essential load release or as a start/stop signal to a standby generator etc.
A wide range overload contact hysteresis can be set to enable R2
to be used for a non-essential load to be reconnected or as a standby
generator stop signal. Relay R3 is an additional relay that can be used
for local indication, as an input to an alarm system etc.
A trip
LED flashes when the trip level is passed, the relay trips when the
delay has elapsed. The timer resets if the fault is removed during
countdown. The High/Low relays can be used to regulate power in AC
systems
