Woodward EGCP-2 - Figure 3-7. Utility;Local Bus Single PT Wiring for Delta and Wye Configuration for

EGCP-2 Engine Generator Control Package Manual 26174
24 Woodward
Sequence of Mains PT Disconnect (DO8) and Local Bus PT Connect (DO7)
The EGCP-2 will command a Mains PT disconnect (DO8) when:
1. The EGCP-2 has an “AUTO” discrete input and either
a. A loss of Mains (LOM) is detected or
b. A “Run with load” discrete input.
2. The Generator Stable Delay time has been met.
3. The EGCP-2 is in the “Close Gen Breaker” mode.
When the Mains PT Disconnect changes state, the EGCP-2 has to measure less
than 40 Vac on the Mains/Bus PT input (terminals 40 and 41). If the EGCP-2
measures greater than 40 Vac after the Mains PT Disconnect command was
given, the EGCP-2 senses this as a fault and will not synchronize.
For this reason, when only one PT signal is being connected, the external relay
logic to remove the incoming Mains/Bus PT signal must still be applied. The
following diagrams, Figures 3-7 and 3-8 show how to connect terminals 40 and
41 for different applications.
40
41
Mains/Bus PT Input
Mains PT
K1-B
Mains PT
Disconnect
(Normally
Closed)
(D08)
Local Bus PT
Connect
(Normally
Open)
(D07)
23
24
VIS-145A
02-5-29
(+V)
K2-B
A
B or N
K1-A
K2-A
21
22
(+V)
EGCP-2
K1*
K2*
A
Bus PT
A
B or N
B or N
(B for Delta, N for Wye)
(B for Delta, N for Wye)
(B for Delta, N for Wye)
- *K1 SHOWN ENERGIZED
- *K2 SHOWN DE-ENERGIZED
- *K1 & K2 RELAYS ARE NOT
NOTES:
SUPPLIED BY WOODWARD
- *K1 and K2 RELAYS SHOULD
BE CONNECTED AS NORMALLY
OPEN CONTACTS
Multiple or Single
Engine Applications
Figure 3-7. Utility/Local Bus Single PT Wiring for Delta and Wye Configuration for
Multiple or Single Engine Applications