12
Instruction Manual
IB015002EN
Effective November 2021
Pow-R-Line CS switchboards
EATON
www.EatonCanada.ca/PRLCS
Current transformers
Switchboards containing metering and monitoring equipment may
contain current transformers (CTs) integral to the switchboard .
Ensure that the load side of the CTs are connected or are shorted
together with terminal block shorting means . Remove shorting
means for normal CT operation with metering equipment . For
additional information and instructions, refer to instruction leaflet
shipped with the switchboard .
Preparing switchboard for insulation/megger testing
CAUTION
FAILURE TO SHORT OR DISCONNECT DURING SWITCHBOARD TESTING
WILL RESULT IN FAILURE OF ELECTRONIC COMPONENTS.
Devices installed with control power fusing
Devices, which require control power fusing, can be easily damaged
beyond repair if not disconnected during the testing phase .
These devices include, but are not limited to, customer metering
equipment, electronic breaker trip units, motor operators and
communication equipment
WARNING
DISCONNECT POWER AT SOURCE BEFORE REMOVING OR INSTALLING
FUSES. HAZARDOUS VOLTAGE WILL CAUSE SEVERE INJURY OR DEATH.
Prior to testing the switchboard, turn off all control power devices
in the switchboard to prevent damage to components . The control
power may be turned off by utilizing the control power switch or by
removing the fuses . Components that use power supplies include
customer metering and certain breaker accessories and these must
be isolated before testing .
CAUTION
FAILURE TO DISCONNECT CONTROL POWER DURING SWITCHBOARD
TESTING WILL RESULT IN FAILURE OF ELECTRONIC COMPONENTS.
Failure to disconnect control power during switchboard
testing will result in failure of electronic components and void
manufacturer’s warranty.
Transient Voltage Surge Suppression (TVSS) and
Surge Protective Devices (SPD)
Prior to testing the switchboard, disconnect line and neutral
connections to all TVSS and/or SPD units in the switchboard . Keep
hardware in a clean and protected environment to guard against
damage until re-installation
CAUTION
FAILURE TO DISCONNECT LINE AND NEUTRAL DURING TESTING WILL
CAUSE THE TVSS AND SPD SURGE PROTECTION SYSTEM TO FAIL AND
WILL VOID THE WARRANTY ON THE DEVICE.
Failure to disconnect line and neutral during testing will cause
the TVSS and SPD surge protection system to fail and will
void the warranty on the device. After testing, re-install all
connections.
Pre-energizing switchboard insulation testing
Exercise extreme care to prevent the equipment from being
connected to the power source while tests are being conducted.
Prior to energizing the switchboard, perform a Megger or DC test
of the switchboard’s insulation . With the neutral isolated from the
ground and the switches and/or circuit breakers open, conduct
electrical insulation resistance tests from phase to phase, phase
to ground, phase to neutral, and neutral to ground . Retain results
for use to compare to results produced in the future . A form for
recording test results is provided in the Appendix of this document .
Prior to testing, remove all control power fusing and connections to
products, which will be damaged in this test . See above .
WARNING
TO PREVENT DAMAGE TO GROUND FAULT CONTROL CIRCUITS,
METERING CIRCUITS, OR OTHER CONTROL CIRCUITS WHEN
MEGGERING SWITCHBOARD, ISOLATE CIRCUITS FROM SWITCHBOARD
SYSTEM BEFORE BEGINNING THE MEGGER OPERATION. BE SURE TO
RECONNECT THOSE CIRCUITS AFTER MEGGER TESTS ARE COMPLETED.
NOTE: SOME GROUND FAULT CIRCUITS MAY NOT BE FUSED,
THEREFORE ISOLATION OF THOSE CIRCUITS REQUIRES DISCONNECTING
WIRING FROM BUS BARS.
DO NOT USE AC dielectric testing.
WARNING
DO NOT USE AC DIELECTRIC/MEGGER TESTING.
Test resulting in readings at or above 1 megaohm is satisfactory .
If failed to comply with these procedures . Eaton is not liable for
damage
Post-testing
After testing, and with the switchboard de-energized, reconnect all
devices, control fusing and disconnects removed prior to testing .
Re-attach Transient Voltage Surge Suppressors (TVSS) and Surge
Protective Devices (SPD) .
Securing the switchboard
Re-install all side covers, deadfront plates, doors and trim parts
on the switchboard using hardware supplied by the manufacturer .
Take caution that conductors are not pinched between parts when
installing the deadfront, cover plates, side sheets and filler plates .
All parts should be aligned and secured when installed . Do not leave
holes or gaps in the deadfront construction . Clean up any debris in
and around the switchboard .
