43
Figure 15 Block diagram: biased differential protection relay Type MBCH16 with six biased inputs
15
16
T8
17
18
T7
19
20
T6
21
22
T5
23
24
T4
25
26
T3
27
28
T1
T2
RL1
2
Output
circuits
RL2
1
1
3
5
RL1–1
2
4
6
RL1–2
10
13
14
12
9
11
RL2–1
12
34
56
78
910
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
Module terminal
block viewed
from rear
Case earth
Input circuits
Input circuits
Reset
Trip
other
phases
V
x
Trip
output
Alarm
See following sheets
6
5
4
3
2
1
See following sheets
DIFF
2. Terminal 12 on each phase assembly should
be interconnected by a screened lead GJ0153 001
with the screen connected to terminal 14.
Notes:
1. (a) CT shorting links make
before (b) and (c) disconnect.
(b) Short terminals break before (c).
(c) Long terminals.
Bias
(see Note 2)
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