Woodward EGCP-2 - Figure 3-9 A. PT Wiring Relationships for Generator, Bus, and Utility Inputs

EGCP-2 Engine Generator Control Package Manual 26174
26 Woodward
Required PT Wiring Relationships
The EGCP-2 control uses its programmed PT-Ratio setting to calculate and
compare all PT input voltages. Thus, the EGCP-2 control requires the following
generator, utility, and plant-bus PT relationships. Figures 3-9(a & b) and 3-10 (a
& b) show these relationships.
Voltage Input: Delta
A
B
C
A+
A-
B+
B-
C+
C-
480 V 120 V
480 V
120 V
PT Ratio : 4:1
Voltage Ref: 480 Vac, L-L
Gen PT
Inputs
VIS-147B
02-5-29
Mains/Bus
PT Input
N
Mains Disconnect
Bus Connect
40
47
46
45
44
43
42
41
EGCP-2
8406-121
A
B
A
C
B
A
B
480 V
120 V
A
B
A
B
C
Utility
Bus
480 VLL
Utility
Breaker
Generator
Breaker
Generator
Bus
Local
Bus
120 V
120 V
120 V
Figure 3-9a. PT Wiring Relationships for Generator, Bus, and Utility Inputs
Please Note:
1. This drawing shows EGCP-2 part number 8406-121.
2. Follow Utility/Local Bus PT wiring.