Woodward EGCP-2 - Potential Transformer (PT) Inputs; Figure 3-5. Three Wire Delta PT Connection for EGCP-2

Manual 26076 EGCP-2 Engine Generator Control Package
Woodward 17
Potential Transformer (PT) Inputs
Potential Transformers (PTs) are utilized with the EGCP-2 control to allow high
level circuit voltages to be stepped down to a safe level for the EGCP-2 input
circuitry. The EGCP-2 control senses generator output voltage through three
Generator PTs, and utility and plant-bus voltages via one shared utility/plant-bus
PT.
Potential Transformer Input Ratings 8406-115
Number of inputs: 4
Maximum Voltage Rating: 150–300 Vac
Burden: 0.45 VA
Input Frequency: 40–70 Hz
Potential Transformer Input Ratings 8406-116
Number of inputs: 4
Maximum Voltage Rating: 50–150 Vac
Burden: 0.25 VA
Input Frequency: 40–70 Hz
Generator PT Input Wiring
The EGCP-2 utilizes a 6 wire generator PT input configuration. This type of
configuration allows the EGCP-2 to be easily wired to either Delta or Wye
generators or transformers. The EGCP-2 control uses all three phases of the
generator to sense both real and reactive generator power. Refer to the Figure
3-5 for Delta based wiring diagrams and Figure 3-6 for Wye based wiring
diagrams. Once wired into a Delta or Wye circuit, the EGCP-2 must also be
programmed to sense the correct (Delta or Wye) configuration. Refer to manual
26086, Configuration menu, item “Voltage Input.”
42
43
44
45
46
47
A PHASE PT
B PHASE PT
C PHASE PT
+
+
+
-
-
-
EGCP-2
VIS-054b
00-06-19
A
B
C
Figure 3-5. Three Wire Delta PT Connection for EGCP-2