GE P645

V03119
D
B
DD
Phase & amplitude
Correction
+
Zero sequence filtering
P645
Phase & amplitude
Correction
+
Zero sequence filtering
Phase & amplitude
Correction
+
Zero sequence filtering
Phase & amplitude
Correction
+
Zero sequence filtering
Phase & amplitude
Correction
+
Zero sequence filtering
B
B
B
B
B
B
B
B
B
B
B
B
B
B
Circuit Breaker 1
Circuit Breaker 2
Circuit Breaker 3
Circuit Breaker 4
Circuit Breaker 5
115kV
Figure 56: Single bus differential protection zone
Assume that feeder CT
s 1 to 5 are connected to inputs T1 to T5 respectively.
Set the following parameters in the SYSTEM CONFIG column:
Setting in GROUP 1 SYSTEM CONFIG Value
Winding Config HV+LV+TV
Winding Type Conventional
HV CT Terminals 01111
LV CT Terminals 10000
Ref Power S 145.0 MVA*
Ref Vector Group 0
HV Connection Y-Wye
HV Grounding Ungrounded**
HV Nominal 115.0 kV***
HV Rating 145.0 MVA****
% Reactance 10.00%
LV Vector Group 0
LV Connection Y-Wye
LV Grounding Ungrounded**
LV Nominal 115.0 kV***
LV rating 145.00 MVA****
TV Vector Group 0
TV Connection Y-Wye
TV Grounding Ungrounded**
TV Nominal 115.0 kV***
P64x Chapter 6 - Transformer Differential Protection
P64x-TM-EN-1.3 131