CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER – INSTRUCTION MANUAL 2–3
2.2 Electrical Configuration
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 2–1: PQMII External Connections
Terminal Description Terminal Description
VT / Control Power Row (1 to 8)
25 Analog out 4+
1 V1 Voltage input 26 Analog out 3+
2 V2 Voltage input 27 Analog out 2+
3 V3 Voltage input 28 Analog out 1+
4 Vn Voltage input 29 Switch 4 input
5 Filter ground 30 Switch 3 input
6 Safety ground 31 Switch 2 input
7 Control neutral (–) 32 Switch 1 input
8 Control live (+) 33 +24 V DC switch com
CT Row (9 to 20)
34 Aux3 relay NC
9 Phase A CT 5A 35 Aux3 relay COM
10 Phase A CT 1A 36 Aux3 relay NO
11 Phase A CT COM 37 Aux2 relay NC
12 Phase B CT 5A 38 Aux2 relay COM
13 Phase B CT 1A 39 Aux2 relay NO
14 Phase B CT COM 40 Aux1 relay NC
15 Phase C CT 5A 41 Aux1 relay COM
16 Phase C CT 1A 42 Aux1 relay NO
17 Phase C CT COM 43 Alarm relay NC
18 Neutral CT 5A 44 Alarm relay COM
19 Neutral CT 1A 45 Alarm relay NO
20 Neutral CT COM 46 Comm 1 COM
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