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Beta
ç
V3N+V3T
ç
X
a
b
ç
V3N
ç
b
³
a
VT3BlkLevel
a
b
a
³
b
ç
V3T
ç
AND
PU3H
t
TRIP3H
VNFundPU
a
b
b
³
a
V_N
PU_VN
TRIPVN
OR
OR
PICKUP
TRIP
ANSI07000001-2-en.vsd
0
t
0
ANSI07000001 V2 EN
Figure 146:
Simplified Pickup and Trip logical diagram of the STEFPHIZ (59THD)
protection
There are two different cases of generator block configuration; with or without generator
circuit breaker. If there is no generator breaker the capacitive coupling to ground is the
same under all operating conditions. When there is a generator breaker, the capacitive
coupling to ground differs between the operating conditions when the generator is running
with the generator breaker open (before synchronization) and with the circuit breaker
closed. This can be shown as in figure
.
-
D
V
3
+
- UV
3
+
- V
3N
+
+
V
3T,A
-
+
V
3T,B
-
+
V
3T,C
-
en07000002-2_ansi.vsd
Ctr/3
Ctr/3
Ctr/3
ANSI07000002 V2 EN
Figure 147:
Generator block with generator circuit breaker
1MRK 502 048-UUS A
Section 9
Voltage protection
317
Technical manual
Summary of Contents for 650 series
Page 1: ...Relion 650 series Generator protection REG650 ANSI Technical manual ...
Page 2: ......
Page 44: ...38 ...
Page 62: ...56 ...
Page 68: ...62 ...
Page 156: ...150 ...
Page 198: ...192 ...
Page 512: ...506 ...
Page 644: ...638 ...
Page 714: ...708 ...
Page 777: ...771 ...