CHAPTER 2: INSTALLATION
ELECTRICAL
PQM POWER QUALITY METER – INSTRUCTION MANUAL
2–5
2.2
Electrical
2.2.1
External
Connections
Signal wiring is to Terminals 21 to 51. These terminals accommodate wires sizes up to 12
gauge.
Please note that the maximum torque that can be applied to terminals 21 to 51 is 0.5
Nm (or 4.4 in ·lb.)
. CT, VT, and control power connections are made using Terminals 1 to 20.
These #8 screw ring terminals accept wire sizes as large as 8 gauge. Consult the wiring
diagrams for suggested wiring. A minimal configuration includes connections for control
power, phase CTs/VTs, and the alarm relay; other features can be wired as required.
Considerations for wiring each feature are given in the sections that follow.
Table 2–2: PQM External Connections
VT / CONTROL POWER
ROW
CT ROW
SIGNAL UPPER ROW
1
V1 Voltage input
9
Phase A CT 5A
21
Analog shield
2
V2 Voltage input
10
Phase A CT 1A
22
Analog in –
3
V3 Voltage input
11
Phase A CT COM
23
Analog in +
4
Vn Voltage input
12
Phase B CT 5A
24
Analog out com
5
Filter ground
13
Phase B CT 1A
25
Analog out 4+
6
Safety ground
14
Phase B CT COM
26
Analog out 3+
7
Control neutral (–)
15
Phase C CT 5A
27
Analog out 2+
8
Control live (+)
16
Phase C CT 1A
28
Analog out 1+
17
Phase C CT COM
29
Switch 4 input
18
Neutral CT 5A
30
Switch 3 input
19
Neutral CT 1A
31
Switch 2 input
20
Neutral CT COM
32
Switch 1 input
33
+24 V DC switch com
34
Aux3 relay NC
35
Aux3 relay COM
36
Aux3 relay NO
37
Aux2 relay NC
38
Aux2 relay COM
39
Aux2 relay NO
40
Aux1 relay NC
41
Aux1 relay COM
42
Aux1 relay NO
Содержание Multilin PQM
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