KPW17x - 3-PHASE GENERATOR REVERSE POWER AND OVERLOAD GUARD
- Precision Generator kW Load Protection, not affected by heavily distorted waveforms
- Total processing time less than 50mS
- 3 or 4-wire systems. Definite time trip delays
- 2-level overload protection (F version)
- Optional fast analogue kW-signal output, <50mS
- Wide range setting of overload contact hysteresis
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
wattmeter and the triple-zone status LEDs at a glance gives the clear
safety message:
- OVERLOAD
- NORMAL
- REVERSE POWER
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 0-1mA for the slave indicator.
The unit meets EN 61010-1 Cat. III, Pollution degree 2 and the relevant
environmental and EMC tests specified in EN 61326-2-4 to comply with the
requirements of the major Classification Societies.
Description
KPW171C - KPW171H & KPW176A - KPW176H
Configuration: 3-Phase, 3-Wire (2W3)
Meter: Bi-Polar 1
Reverse
power relay (R1) is used to trip the generator breaker. The overload
relay (R2) 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 R2 to be used for non-essential load to be reconnected or as
standby generator stop signal.
Relay R3 is intended for
notification of a reverse power condition, or can be used for local
indication, as input to an alarm system etc. R1 and R3 will latch after
trip.
KPW176A & KPW176H have analogue output proportional to the generator kW-load.
KPW171F & KPW171HF - KPW176F & KPW176HF
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.
KPW176F & KPW176HF have
analogue output proportional to the generator kW-load.
KPW172A & KPW178A
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.
KPW178A have
analogue output proportional to the generator kW-load.
NB! Meter and relay range is +/-100%.
KPW172B & KPW178B
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 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.
KPW178B have analogue output proportional to the generator kW-load.
NB! Meter and relay range is +/-100%.
KPW174C - KPW174H & KPW177A - KPW177H
Configuration: 3-Phase, 4-Wire (3W4)
Meter: Bi-Polar 1
Reverse power relay (R1) is used to trip
the generator breaker. The overload relay (R2) 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 R2 to be used for
non-essential load to be reconnected or as standby generator stop
signal.
Relay R3 is intended for notification of a reverse power
condition, or can be used for local indication, as input to an alarm
system etc. R1 and R3 will latch after trip.
KPW177A & KPW177H have
analogue output proportional to the generator kW-load.
KPW174F & KPW174HF - KPW177F & KPW177HF
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.
KPW177F & KPW177HF have
analogue output proportional to the generator kW-load.
KPW175A & KPW179A
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.
KPW179A have
analogue output proportional to the generator kW-load.
NB! Meter and relay range is +/-100%.
KPW175B & KPW179B
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
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.
KPW179B have
analogue output proportional to the generator kW-load.
NB! Meter and relay range is +/-100%.
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.
