Manual 26086 EGCP-2 Engine Generator Control Package
Woodward 69
IDLE/RATED Relay Output
The EGCP-2 can be configured to provide a relay output which will signal the
engine electronic speed control to change from idle to rated speed operation.
When configured for this output, Discrete Output 12 will energize to provide the
idle to rated indication.
The idle to rated indication takes place after a successful start (generator above
crank cutout speed) has occurred, the engine is operating at, or above the idle
speed setpoint, and the idle delay time setpoint has expired.
Generator Voltage Control
The EGCP-2 has the ability to control the voltage of the generator set. This ability
is used to control four separate operations which require generator voltage
adjustment:
1. Manual voltage adjustment
2. Voltage Matching during Synchronization across the generator or mains
breaker
3. Reactive load sharing between multiple units on an isolated bus
4. Reactive load control while in parallel with the mains.
The generator voltage, or reactive load (depending on the operation) is adjusted
by injecting a voltage bias signal to the Automatic Voltage Regulator. The EGCP-
2 can be set for ±1 Vdc, ±3 Vdc, and ±9 Vdc outputs. The span of the output is
selected by the “Voltage Bias Type” configuration menu item in the EGCP-2.
Select the proper voltage range input as recommended by the AVR
manufacturer.
Generator Voltage can be manually controlled from the Voltage Raise and
Voltage Lower Discrete inputs to the EGCP-2. The rate of change for manual
voltage adjustment is set in the Reactive Load Control tuning menu, at the
Voltage Ramp Time setpoint. The voltage ramp time is the amount of time it will
take for the EGCP-2 to send a 0 to 100%, or 0 to –100% voltage bias signal to
the AVR.
When operating in the TEST mode, manual voltage adjustment is only allowed
through the voltage raise and lower inputs. This allows testing of the Voltage
Bias output, and generator voltage levels prior to operation with load on the
generator.
When operating in Isoch mode, the EGCP-2 does not allow manual adjustment
of the voltage, unless the Load Control setpoint in the Configuration tuning menu
is set for “Droop”, or the VAR/PF Control Setpoint in the Reactive Load Control
tuning menu is set to “Disabled”. Using either of these settings implies that a
manual voltage control will be used, and no automatic reactive load control
functions are active.
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