EPM 9450/9650 ADVANCED POWER QUALITY METERING SYSTEM – INSTRUCTION MANUAL 4–1
EPM 9450/9650
Chapter 4: Electrical Installation
GE
Grid Solutions
Electric al Installation
This chapter provides electrical installation information for the EPM 9450/9650 meter.
4.1 Considerations When Installing Meters
Installation of the EPM 9450/9650 meter must be performed only by qualified
personnel who follow standard safety precautions during all procedures. Those
personnel should have appropriate training and experience with high voltage devices.
Appropriate safety gloves, safety glasses and protective clothing are recommended.
During normal operation of the EPM meter, dangerous voltages flow through many parts
of the unit, including: Terminals and any connected CTs (Current Transformers) and PTs
(Potential Transformers), all I/O Modules and their circuits. All Primary and Secondary
circuits can, at times, produce lethal voltages and currents. Avoid contact with any
current-carrying surfaces.
Do not use the meter or any I/O device for primary protection or in an energy-limiting
capacity. The meter can only be used as secondary protection.
Do not use the meter for applications where failure of the meter may cause harm or death.
Do not use the meter for any application where there may be a risk of fire.
All meter terminals should be inaccessible after installation.
Do not apply more than the maximum voltage the meter or any attached device can
withstand. Refer to meter and/or device labels and to the Specifications for all devices
before applying voltages. Do not HIPOT/Dielectric test any Outputs, Inputs or
Communications terminals.
GE requires the use of Shorting Blocks and Fuses for voltage leads and power supply to
prevent hazardous voltage conditions or damage to CTs, if the meter needs to be removed
from service. One side of the CT must be grounded.
Note
The current inputs are only to be connected to external current transformers.
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