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E154713
4-1
4: Electrical Installation
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
Electro
Industries/GaugeTech
The Leader In Power Monitoring and Smart Grid Solutions
4: Electrical Installation
4.1: Considerations When Installing Meters
Installation of the Nexus® 1500+ 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 Nexus® 1500+ meter, dangerous voltages
are present
through many parts of the meter, including: Terminals and any connected CTs (Cur-
rent Transformers) and PTs (Potential Transformers), all I/O (Inputs and Outputs) 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 for primary protection or in an energy-limiting capac-
ity. 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.
EIG requires the use of fuses for voltage leads and power supply, and shorting blocks
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
provided by the installer. The CTs shall be Approved or Certified and rated for the
current of the meter used.
Branch circuit protection size should be 15 amps.
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