GE DGP Series, Instruction Manual

Page: 28 / 278

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DGP Digital Generator Protection System GE Power Management
1.3 PROTECTION FEATURES 1 PRODUCT DESCRIPTION
1
Figure 1–7: SIMPLE LOGIC DIAGRAM – VT FUSE FAILURE
NOTE:
* = 1 FOR 5 AMP RATED DGPs.
* = 5 FOR 1 AMP RATED DGPs.
A N D
A N D
(+)
E x t e r n a l V T F F
D I 6
O R
P U
D O
O R
P U
D O
E N A
D I S
V T F F
V T F F A l a r m
Critical Alarm
A N D
O R O R
O R
S u p e r v i s e
5 1 V ,
21(Future)
F D
D D
I1 > 0.1/*
5 1 V P i c k u p F l a g
40 Pickup Flag
8 7 G P i c k u p F l a g O R
5 1 G N P i c k u p F l a g
21 Pickup Flag (Fut.)
O R
6 4 G 1 P i c k u p F l a g
6 4 G 2 P i c k u p F l a g
(+)
D I 1
S E L B K D I 1
G e n .
Off-Line
O R
V T F F + D I 6
S u p e r v i s e
5 1 V ,
21(Future)
D G P _ V T F F . V S D
|
∆
I2|
≥
0.2 / *
|
∆
I1|
≥
0.2 / *
|
∆
I0|
≥
0.2 / *
∆
I0
≥
0.6 / *
∆
I2
≥
0.6 / *
P U = 9 0 0 0 s a m p l e s
D O = 0
V 1 < 5 0 V
V 2
>
1 5 V
P U = 3 6 s a m p l e s
D O = 0