Voltage Signal Connections; Connections; Selecting The Voltage Fuses; Current Signal Connections - GE Multilin EPM 2000 Series Instruction Manual

NOTE 1: The EPM 2000's Field Programmable PT and CT Primary or secondary Settings may be
utilized to Calibrate out the PT and CT amplitude error, for improved accuracy.

5.3. Voltage Signal Connections

For proper meter operation, the voltage connection must be maintained. The voltage must
correspond to the correct terminal. 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.
There are 4 Voltage input terminals marked V1, V2, V3 and Vn. See the wiring diagrams
that follow, for details. For Delta connection, the Vn terminal should be left un-
connected.
5.3.1. PT Connections
The EPM 2000 directly accepts LT voltage inputs of up to 600 V ac rms Line to Line (347 V
L-N). Voltages greater than this, typically HT systems, must be connected through Potential
Transformers (PTs). The EPM 2000 allows Field Programming of both PT Primary and
Secondary voltages. See the voltage input overload graph for more detail
Field Programmable PT Primary range
Field Programmable PT Secondary range : 100v to 600v AC RMS L-L.
EPM 2000 Voltage Input burden
See the Setup (Field Programming) section
IMPORTANT: The PT Primary and Secondary values must be User Programmed
before using the Meter. Otherwise, the readings will be wrong.
CAUTION
opening the circuit or removing the fuse. Do not short the PT secondary.

5.3.2. Selecting the Voltage Fuses

We strongly recommend using fuses on each of the sense voltages and the control / auxiliary
power, although connection diagrams often do not show them. Use a 1 Amp fuse on each
voltage input.

5.4. Current Signal Connections

The meter accepts up to 6 A AC rms per channel directly. Above that, a Current Transformer
must be interposed to scale down the current.
There are three pairs of Current Input terminals marked A1
proper measurements, the phase identification as well as the polarity of the current signals
must be correct. The Forward flow (Import by consumer) current direction must be into the
A1 terminal and the exit from the A1
1
polarity to avoid wrong readings.
Any unused current input terminals (eg A2
shorted terminals do not need to be grounded.
Install the wiring for the current circuit at 600V AC insulation as a minimum. The cable
connection should be rated for 7.5 Amps or greater and have a cross-sectional area of 16
AWG minimum.
GE Multilin
: 0.1 kV to 999 kV AC RMS L-L.
: 0.2 VA per input.
for programming details.
:
Before wiring, de-energize the PT secondary by
terminal. Please maintain the correct sequence and
2
, A2 for Delta) must be shorted together. The
1 2
Sub Meters
-A1 , A2 -A2 and A3 -A3
1 2 1 2 1
. For
2
37