GE Pqm 2 Manual

CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL2–11
For a single-phase connection, connect current and voltage to the phase A inputs only. All 
other inputs are ignored. Select the 
S2 SYSTEM SETUP  CURRENT/VOLTAGE CONFIGURATION  VT 
WIRING:
 “SINGLE PHASE” setpoint .
FIGURE 2–8: Single Phase Connection 

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CHAPTER 2: INSTALLATION
2.2.3 3-wire System using Two CTs
The f igure below shows two methods for connecting CTs to the PQMII for a 3-wire system. 
The top drawing shows the standard wiring conf iguration using three CTs. An alternate 
wiring conf iguration uses only two CTs. With the two CT method, the third phase is 
measured by connecting the commons from phase A and C to the phase B input on the 
PQMII. This causes the phase A and phase C current to...

CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL2–13
2.2.4 Control Power
The control power supplied to the PQMII must match the installed power supply. If the 
applied voltage does not match, damage to the unit may occur. Check the product 
identif ication to verify the control voltage matches the intended application.
A universal AC/DC power supply is standard on the PQMII. It covers the range 90 to 300 V 
DC and 70 to 265 V AC at 50/60 Hz. It is not necessary to adjust the PQMII...

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CHAPTER 2: INSTALLATION
2.2.7 Output Relays
The basic PQMII comes equipped with one output relay; the control option supplies three 
additional output relays. The PQMII output relays have form C contacts (normally open 
(NO), normally closed (NC), and common (COM)). The contact rating for each relay is 5 A 
resistive and 5 A inductive at 250 V AC. Consult 1.6: Specifications for contact ratings under 
other conditions. The wiring diagrams show the state...

CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL2–15
Each switch input can be programmed with a 20-character user def ined name and can be 
selected to accept a normally open or normally closed switch. A list of various functions 
assignable to switches is shown below, followed by a description of each function.
•Alarm Relay: When a switch input is assigned to the alarm relay, a change in the 
switch status produces an alarm condition and the alarm relay activates.
•Pulse Input...

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CHAPTER 2: INSTALLATION
FIGURE 2–11: Analog Input Multiplexing
•Aux 1/2/3 Relay: When a switch input is assigned to an Auxiliary relay, a closure on 
the switch input causes the programmed auxiliary relay to change state. This 
selection is available only if the Control (C) option is installed.
•Clear Energy: When a switch input is assigned to “Clear Energy”, a closure on the 
switch input will clear all Energy data within the PQMII.
•Clear Demand: When...

CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL2–17
FIGURE 2–12: Analog Output
As shown in wiring diagrams, these outputs are at Terminals 25 to 28 and share Terminal 
24 as their common. Shielded cable should be used, with only one end of the shield 
grounded, to minimize noise effects.
Signals and power supply circuitry are internally isolated, allowing connection to devices 
(PLCs, computers, etc.) at ground potentials different from the PQMII. Each terminal, 
however, is...

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CHAPTER 2: INSTALLATION
indicates that the PQMII is transmitting data. Each PQMII must be daisy-chained to the 
next one as shown in the f igure below. Avoid star or stub connected conf igurations. If a 
large difference in ground potentials exists, communication on the serial communication 
link will not be possible. Therefore, it is imperative that the serial master and PQMII are both 
at the same ground potential. This is accomplished by joining the...

CHAPTER 2: INSTALLATION
PQMII POWER QUALITY METER  – INSTRUCTION MANUAL2–19
2.2.12 RS232 Front Panel Port
A 9-pin RS232C serial port provided on the front panel allows the user to program the 
PQMII with a personal computer. This port uses the same communication protocol as the 
rear terminal RS485 ports. To use this interface, the personal computer must be running 
the EnerVista PQMII Setup Software provided with the relay. Cabling to the RS232 port of 
the computer is shown below for both 9-pin and...

2–20PQMII POWER QUALITY METER  – INSTRUCTION MANUAL
CHAPTER 2: INSTALLATION
FIGURE 2–15: Hi-Pot Testing
746702A1.CDR
5
PQMII
POWER QUALITY METER
GE Multilin