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Manual 26174
EGCP-2 Engine Generator Control Package
Woodward
47
Discrete Output #11—Audible Alarm
With the relay de-energized, this output has Normally Open (NO) terminals 31
and 32 and Normally Closed (NC) terminals 32 and 33 contacts to select from.
The “Audible Alarm” relay output can be utilized as an option to control a plant
Alarm Horn to indicate when an alarm condition has been sensed by the EGCP-2
control. This relay energizes upon any sensed alarm condition and will remain
energized until an acknowledged command is given. Refer to chapter 2 for
information on acknowledging and committing alarms.
When an alarm set point is configured for Audible Alarm, the alarm condition will
cause the audible and visual alarm output relays to energize and the red LED on
the face of the EGCP-2 to flash. All alarm indicators will remain active until the
alarm condition is acknowledged. No control actions occur as a result of an
audible alarm condition.
Discrete Output #12—
kVA
Load or Idle/Rated Switch
This relay uses Normally Open (NO) contacts at terminal 34 and 35.
Discrete Output #12 can be configured for a “KVA Load” or an “Idle/Rated”
switch. This selection is done in the Configuration menu under “Relay #12
Function”.
KVA Load Switch
This relay will energize when the controls kVA value is within the configured Low
and High settings. The relay will de-energize when the kVA value is below or
above the configured Low and High settings. The low and high set points are
configured in the Real Load Control menu, under items “kVA Switch Low” and
“kVA Switch High”.
Idle/Rated Switch
When selected as an Idle/Rated switch, the output must be connected to the
engines speed control. This relay is de-energized to select an idle speed
settings, and after reaching the set idle speed value and holding at that point for
the set amount of time, the relay energizes to select the speed controls rated
speed setting. The speed value and time are configured in the Engine Control
menu under items “Idle Speed” and “Idle Time”.
The engines idle speed must be equal to or greater than the configured “Idle
Speed” value to start the “Idle Time”. The EGCP-2 uses the magnetic pickup
(MPU) signal to calculate the idle speed. If no MPU is connected, the idle speed
is calculated from the Generators frequency. Remember, if the generator is NOT
excited at idle speed and there is no MPU signal, the Idle/Rated switch will not
energize.
When a Loss of Mains (LOM) or an overloaded system condition exists, the
idle/rated function is bypassed, and rated speed is selected during the start
sequencing routine.