EGCP-2 Engine Generator Control Package Manual 26174
36 Woodward
Calibration menu
1. Oil Pressure Gain
2. Oil Pressure Offset
3. Water Temp Gain
4. Water Temp Offset
Speed Bias and Voltage Bias Outputs
The EGCP-2’s Speed Bias output is a dedicated analog output, which is used to
bias the prime mover’s speed control for unit synchronization and load control.
The Speed Bias output is software configurable for outputs of ±3 Vdc, 0.5–4.5
Vdc, or 500 Hz PWM.
±3 Vdc—Compatible with Woodward analog and digital speed Controls via the
Aux Inputs or the load sharing lines on the 2301/2301A LSSC.
0.5–4.5 Vdc—Compatible with the Detroit Diesel Corp. DDEC-III and IV Control
and Caterpillar’s Gas Engine Control Module (GECM).
500 Hz PWM—Compatible with Caterpillar’s ADEM control (diesel engine).
Refer to Appendix B of this manual for control specific speed bias connections.
The EGCP-2’s Voltage Bias output is a dedicated analog output, which is used to
bias the generator’s automatic voltage regulator for unit synchronization and
reactive load control. The Voltage Bias output is software configurable for outputs
of ±1 Vdc, ±3 Vdc, or ±9 Vdc.
The voltage bias output works with many automatic voltage regulators. Following
is a list of manufacturers and types:
Basler Caterpillar KATO Newage Leroy Somer Marathon
SR4A VR3 360 MX321 R438 DVR2000E
SR8A Digital VR 760 MX341 R448
SSE VR6 K65-12B MA325 R449
SSR CDVR K-125-10B
DECS
AVC
Appendix C shows connections and adjustment procedures for some of these
regulators. The regulators listed are examples of some of the more common
regulators. There are always new regulators being introduced in the market and
you should use these drawings as examples of possible connection scenarios.
A common connection is an Accessory or Auxiliary input. This input takes a dc
voltage, ±1 Vdc is common, to change the rated voltage of the generator by
±10%. So with any new regulator, check the specifications if this type input is
available. An example is the Basler SSR regulator, see connection diagram in
Appendix C.
The EGCP-2 only provides an analog, ± Vdc output and will not function with any
regulator that accepts discrete inputs only. An example of this is the Marathon
2000 DVR.
The Speed and Voltage Bias Outputs will only drive into high impedance type
inputs, and are limited to inputs, which have an input impedance of 1000 or
more.
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