www.eaton.com IM02601004E Page 41
3 Installation
3.9. WIRING
Wiring of the Power Xpert Meter must follow a suitable wiring plan drawing. The phase
wiring plan refers to the drawings made for the specic application. It describes all
electrical connections between the meter and external equipment. A network wiring
diagram can also be helpful for networked systems. Specic wiring diagrams are useful
when creating the overall wiring plan drawing. Wiring diagrams for each system congura-
tion are addressed below.
WARNINGS
SHOCK HAZARDS:
IF THIS DEVICE IS BEING USED ON A SINGLE PHASE SYSTEM, WIRE TO PHASE A
AND NEUTRAL.
The following general considerations should be complied with during the wiring of the
Power Xpert
Meter.
All wiring must conform to applicable Federal, State and Local codes.
The wires to the terminal blocks must not be larger than AWG No. 10 (CT, VT, VX). Larger
wire will not connect properly to the terminal block.
Wiring diagrams contacts are shown in their de-energized position.
Because the Power Xpert Meter monitors the neutral-to-ground voltage, the chassis of the
meter must be connected to ground. A good low impedance ground is essential for proper
functioning.
PT AND CT SECONDARY CIRCUITS ARE CAPABLE OF GENERATING DANGEROUS
VOLTAGES AND CURRENTS WITH THEIR PRIMARY CIRCUITS ENERGIZED, AND
COULD CAUSE PERSONAL INJURY AND OR DEATH.
The proper selection of any required current transformers or potential transformers is criti-
cal to the proper and accurate functioning of the Power Xpert
Meter. Instrumentation grade
devices are required. Shorting blocks for CTs and a three-phase switch or circuit
breaker for voltage are recommended near the equipment for ease of installation. If
assistance with the selection process is desired, contact Power Quality Technical Support
representative.
3.10. Fuses
It is required that user supplied fuses be installed as described below.
External fuses should be installed in the meter voltage tap to the main lines, near the
meter housing. 600 V 1/2 A BUSS type KTK-R-1/2 Fast Acting or equivalent fuses are
recommended for the Power Xpert Meter VT connections.
External fuses should be installed in the potential transformer lines as specied in the
National Electric Code for the specic application.
The power supply wiring should be fused or put on a breaker sized to protect the wire.
3.11. Hipot and Megohm (Megger) Testing
CAUTION
DO NOT HIPOT OR MEGOHM TEST THE METER. SEVERE DAMAGE TO THE METER
CAN RESULT.
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