9-4 G30 Generator Protection System GE Multilin
9.1 SETTING EXAMPLE 9 APPLICATION OF SETTINGS
9
d) NO IN-ZONE TRANSFORMER
Consider the generator protection system shown below, with no in-zone transformer:
Figure 9–3: TYPICAL WIRING, NO IN-ZONE TRANSFORMER
The two sources are configured as follows:
830747A1.CDR
CONTACT INPUT H5a
CONTACT INPUT H5c
CONTACT INPUT H6a
CONTACT INPUT H6c
COMMON H5b
CONTACT INPUT H7a
CONTACT INPUT H7c
CONTACT INPUT H8a
CONTACT INPUT H8c
COMMON H7b
SURGE
H6a
H8a
H5b
H7b
H8b
H5a
H7a
H6c
H8c
H5c
H7c
H1a
H2b
H1c
H1b
H2c
H2a
H4a
H4c
H3b
H3a
H4b
H3c
H1
H2
H3
H4
DIGITAL INPUTS/OUTPUTS
6G
I
V
I
V
I
V
I
V
8F
F8c
F8a
F5a
F5c
F7c
F6a
F7a
F6c
VX
VA
VB
VC
VOLTAGE INPUTS
VX
VA
VB
VC
F1c
F4a
F3c
CURRENT INPUTS
F2c
F4c
F1a
F4b
F1b
F2a
F3a
F2b
F3b
IA
IB
IC
IG
IA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1
M3c
M4c
M4b
M4a
M1c
M1a
M1b
M3b
CURRENT INPUTS
8H
M2a
M3a
M2b
M2c
IA
IB
IC
IG
IA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1
“+”
Inlet valve 52b
Trip generator breaker
Trip field breaker
Trip turbine
Alarm
G30
Generator Management Relay
“–”
R
A
B
C
X2
X3
H1
H2
H3
X1X2
X3
H1
H2
H3
X1
52
13.2 : 25 kV
153 MVA
X = 0.1 pu
13.8 kv, 162 MVA
X΄ = 0.216 pu
X = 1.967 pu
I2T capability = 10
I2 capability = 8%
Motoring power = 10%
To Next Page
Loading...
