Areva MiCOM P341, Руководство по эксплуатации

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P341/EN O/B11 Operation Guide
CHAPTER 3 Commissioning and
Page 8/80 Maintenance
MiCOM P341
4.1.1 Visual inspection
Carefully examine the relay to see that no physical damage has occurred since
installation.
The rating information given under the top access cover on the front of the relay
should be checked to ensure it is correct for the particular installation.
Ensure that the case earthing connections, bottom left-hand corner at the rear of the
relay case, are used to connect the relay to a local earth bar using an adequate
conductor.
19
1
2 3
4
5 6
7 8 9
10 11
12
13
14 15
16 17
18
20
22
21
23
24
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
D C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
E
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
F A B
TX
IRIG-B
RX
POR
T 1
Figure 1: Rear terminal blocks on size 40TE case
4.1.2 Current transformer shorting contacts
If required, the current transformer shorting contacts can be checked to ensure that
they close when the heavy duty terminal block (block reference C in Figure 1) is
disconnected from the current input PCB.
Shorting Contact Between Terminals
Current Input
1A CT’s 5A CT’s
f
A
C3 – C2 C1 – C2
f
B
C6 – C5 C4 – C5
f
C
C9 – C8 C7 – C8
f
N SENSITIVE
C15 – C14 C13 – C14
Table 1: Current transformer shorting contact locations
Heavy duty terminal block are fastened to the rear panel using four crosshead screws.
These are located top and bottom between the first and second, and third and fourth,
columns of terminals (see Figure 2).