• Precision Generator kW Load Protection, not affected by heavily distorted waveforms
• Available for 3-phase, 3-wire (2W3) or 4-wire (3W4) systems
• Definite time trip delays
• 2-level overload protection (F versions)
• Up to two individual very fast analogue output signals (<50mS), (optional)
• Wide range setting of overload contact hysteresis
• DIN96 Slave Indicator with status LEDs (optional)

Description
The digitally controlled KCW17x range provides precision (1.0%) reverse power and overload protection and monitoring of three phase generators.

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 4 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 kW. The optional slave watt-meter and the triple-zone status LEDs at a glance gives the clear safety message:
Outputs
KCW171C - KCW171H - KCW176AA - KCW176AB - KCW176HA - KCW176HB
Configuration: 3-Phase, 3-Wire (2W3)
Meter: Bi-Polar 1

Reverse power relay (R3) is used to trip the generator breaker. The overload relay (R1) can be used for non-essential load release or as start signal to standby generator etc. A wide range overload hysteresis can be set to enable R1 to be used for non-essential load to be reconnected or as standby generator stop signal.

Relay R2 is intended for notification of a reverse power condition, or can be used for local indication, as input to an alarm system etc. R2 and R3 will latch after trip KCW171F - KCW171HF - KCW176FA - KCW176FB - KCW176HFA - KCW176HFB
Configuration: 3-Phase, 3-Wire (2W3)
Meter: Bi-Polar 1

Reverse power relay (R1) is used to trip the generator breaker. The two individual settable overload relays (R2 and R3) can be used for non-essential load release or as start signal to standby generator etc.

R2 and R3 are non-latching and have a 10% fixed hysteresis.

KCW172A - KCW178AA - KCW178AB
Configuration: 3-Phase, 3-Wire (2W3)
Meter: Bi-Polar 2

The overload relay (R2) can be used for non-essential load release or as start signal to standby generator etc. A wide range adjustment for overload contact hysteresis can be set to enable R2 to be used for non-essential load to be reconnected or as standby generator stop signal.

Reverse overload relay (R1 & R3) is reverse over load protection when generator is running as motor. Reverse power relays can be used for generator trip, local indication, alarm system etc.

NB! Meter and relay range is +/-100%.


The overload relay (R2) can be used for non-essential load release or as start signal to standby generator etc. A wide range adjustment for overload contact hysteresis can be set to enable R2 to be used for non-essential load to be reconnected or as standby generator stop signal.

Reverse overload relay (R1 & R3 with different setting range) is reverse over load protection when generator is running as motor. Reverse power relays can be used for generator trip, local indication, alarm system etc.

NB! Meter and relay range is +/-100%.

KCW174C - KCW174H - KCW177AA - KCW177AB - KCW177HA - KCW177HB
Configuration: 3-Phase, 4-Wire (3W4)
Meter: Bi-Polar 1

Reverse power relay (R3) is used to trip the generator breaker. The overload relay (R1) can be used for non-essential load release or as start signal to standby generator etc. A wide range overload hysteresis can be set to enable R1 to be used for non-essential load to be reconnected or as standby generator stop signal.

Relay R2 is intended for notification of a reverse power condition, or can be used for local indication, as input to an alarm system etc. R2 and R3 will latch after trip.

KCW174F - KCW174HF - KCW177FA - KCW177FB - KCW177HFA - KCW177HFB
Configuration: 3-Phase, 4-Wire (3W4)
Meter: Bi-Polar 1

Reverse power relay (R1) is used to trip the generator breaker. The two individual settable overload relays (R2 and R3) can be used for non-essential load release or as start signal to standby generator etc.

R2 and R3 are non-latching and have a 10% fixed hysteresis.

KCW175A - KCW179AA - KCW179AB
Configuration: 3-Phase, 4-Wire (3W4)
Meter: Bi-Polar 2

The overload relay (R2) can be used for non-essential load release or as start signal to standby generator etc. A wide range adjustment for overload contact hysteresis can be set to enable R2 to be used for non-essential load to be reconnected or as standby generator stop signal.

Reverse overload relay (R1 & R3) is reverse over load protection when generator is running as motor. Reverse power relays can be used for generator trip, local indication, alarm system etc.

Depending on application, select the model that matches the electrical installation.
If none of the listed models fit your purpose please contact Megacon for customer adaptation.