GE EPM 3000P - Manual (Page 8)

CHAPTER 2
E
LECTRICAL
I
NSTALLATION
2.1 C ONNECTING THE C URRENT C IRCUIT
The cable used for the current should be installed at 600V AC minimum. The cable connector should be rated at 6
Amps or greater, and it should have a cross-sectional area of 16 AWG.
The current transformers should be mounted as close as possible to the meter. The following table gives the
maximum recommended distances for various CT sizes, assuming the connection is made via 16 AWG cable.
CT SIZE (VA) MAXIMUM DISTANCE (CT TO EPM3000P)
2.5 VA 10 F EET
5.0 VA 15 F EET
7.5 VA 30 F EET
10.0 VA 40 F EET
15.0 VA 60 F EET
30.0 VA 120 F EET
WARNING: DO NOT LEAVE SECONDARY OF CT WHEN PRIMARY CURRENT IS FLOWING . T HIS MAY CAUSE HIGH VOLTAGE ,
WHICH OVERHEATS THE SECONDARY OF THE CT. I F THE CT IS NOT CONNECTED , PROVIDE A SHORTING BLOCK ON THE
SECONDARY OF THE CT.
2.2 C ONNECTING V OLTAGE C IRCUIT OF P OTENTIAL T RANSFORMER
For proper operation, the voltage connection must be maintained. If an error occurs, such as mistaking Line A for
Line B, a PH message appears, indicating a Phase Reversal (see Phase Imbalance and Reversal).
The cable required to terminate the voltage sense circuit should have an insulation rating greater than 600V AC and a
current rating greater than 0.1 A.
2.3 S ELECTING THE V OLTAGE F USES
We recommend using fuses, although connection diagrams do not show them. Slow blow, 200 mA rating fuses
should be used.
The maximum voltage EPM3000P can handle 150V phase to neutral. If Suffix -G is added to the model number, the
maximum voltage to be used is 300V phase to neutral.
2.4 C ONNECTION TO THE M AIN P OWER S UPPLY
The EPM3000P requires a separate power supply connection. Listed are the 5 different power supply options and
corresponding.
NOTE: F OR DC- POWERED UNITS POLARITY MUST BE OBSERVED . A N EARTH TO GROUND CONNECTION TO CHASSIS IS
MANDATORY FOR NORMAL OPERATION ( TERMINAL 3). D O NOT GROUND THE UNIT THROUGH THE NEGATIVE OF THE DC SUPPLY .
S EPARATE GROUNDING IS REQUIRED .
POWER SUPPLY OPTIONS SUFFIXES CURRENT
120V AC N O S UFFIX .1 AAC
240V AC A .05 AAC
24V DC D .5 ADC
48V DC D1 .25 ADC
125V DC D2 .1 ADC
3
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