Description

KPW171, KPW174, KPW176 and KPW177

Reverse Power & Overload Protection, Output Relay, optional Analog Output

• 3-PHASE GENERATOR REVERSE POWER AND OVERLOAD GUARD

• Watt Transducer when installed with Analog Output

• Wide range setting of overload contact hysteresis

• Optional fast analogue kW-signal output, <50mS

• 2-level overload protection (F version)

• 3 or 4-wire systems. Definite time trip delays

• Total processing time less than 50mS

• Precision Generator kW Load Protection, not affected by heavily distorted waveforms

Application

The digital controlled KPW17x range provides precision (1.0%) reverse power and overload protection and  monitoring of three phase generators.

Available for 3-phase 3-wire (2W3) and 4-wire (3W4) systems.

The unit measures the voltage and current true r.m.s. value, and accuracy is independent of any wave form distortion.

As standard the auxiliary voltage is taken from the unit monitored voltage input. A separate AC or DC auxiliary voltage is optionally available.

A green LED indicates POWER on. 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 DIN96 instrument reads the power level directly in kW. The watt meter and the triple-zone status LEDs at a glance gives the clear safety message:

• OVERLOAD
  

• REVERSE POWER

• NORMAL

Relay Outputs
Relay operation depends on the selected model. Other combinations are available on request.

Outputs
If output is used for remote meter reading, we recommend 0-10mA for the slave indicator. Watt Transducer for Load Sharer without own load calculation.