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Configuration and Settings – 3
3–17
2400
/
120
4200
/
120
7200
/
120
14400
/
120
85
Ω
85
Ω
125
Ω
R
VT
Ratio
250
Ω
Typical Values
Watts
at 208 V
175
350
510
510
Table 3-1
Typical Shunt Resistor Values
A
B
C
Power
Transformer
a
b
c
59G
Resistor
To Dispersed Storage
and Generation (DSG)
To Utility
Figure 3-20
Ground Fault Detection Using a Broken-Delta VT and 59G
A
B
C
Power
Transformer
a
b
c
To Dispersed Storage
and Generation (DSG)
To Utility
V L-L
Fault on phase 'a' V = 0
27G detects Undervoltage
27G
59G
R
Fault on phase 'b' or 'c'
V = V
LL
59G detects
Overvoltage
Figure 3-21
Ground Fault Detection Using One Phase-to-Ground VT and 59G/27G
Summary of Contents for Syncrocloser M-3410A
Page 1: ...Instruction Book M 3410A Intertie Generator Protection Relay ...
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