Instruction Manual
Pow-R-Line Retrofit Panelboards
Page
8
Effective: November 2007
P1R & P2R Retrofit Panels
For more information visit: www.EatonCanada.ca
11/2007
leaflets that are shipped with each panelboard
containing GFP or contact Eaton Electrical.
Preparing Panelboard for
Insulation/Megger Testing
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. Prior to testing the
panelboard, turn off all control power devices in the
panelboard 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.
TO PREVENT DAMAGE TO GROUND FAULT
CONTROL CIRCUITS, METERING CIRCUITS,
TRANSIENT VOLTAGE SURGE PROTECTION
(TVSS) OR OTHER CONTROL CIRCUITS, WHEN
MEGGERING PANELBOARD, ISOLATE
CIRCUITS FROM PANELBOARD 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 TEST A CIRCUIT BREAKER WHILE IT’S
IN SERVICE AND ENERGIZED.
TESTING OF A CIRCUIT BREAKER THAT
RESULTS IN THE TRIPPING OF THE CIRCUIT
BREAKER SHOULD BE DONE ONLY WHEN THE
PANELBOARD IS DE-ENERGIZED.
FAILURE TO SHORT OR DISCONNECT DURING
PANELBOARD TESTING WILL RESULT IN
FAILURE OF ELECTRONIC COMPONENTS.
DISCONNECT POWER AT SOURCE BEFORE
REMOVING OR INSTALLING FUSES.
HAZARDOUS VOLTAGE. WILL CAUSE SEVERE
INJURY OR DEATH.
Failure to disconnect control power during
panelboard testing will result in failure of
electronic components and void manufacturer’s
warranty.
Pre-Energizing Panelboard
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 panelboard, perform a
Megger or DC test of the panelboard’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. Prior to testing,
remove all control power fusing and connections to
products, which will be damaged in this test. See
above.
DO NOT USE AC Dielectric
testing.
Test resulting in readings at or above 1 megaohm
is satisfactory.
Post-Testing
After testing, and with the panelboard de-energized,
reconnect all devices, control fusing and
disconnects removed prior to testing.
Securing the Panelboard
Install the dead front cover and trim parts on the
panelboard using hardware supplied by the
manufacturer. Take caution that conductors are not
pinched between parts when installing the dead-
front cover and trim. All parts should be aligned and
secured when installed.
Do not leave holes or gaps in the dead-front
construction.
Clean up any debris in and around the panelboard.
FAILURE TO DISCONNECT CONTROL POWER
DURING PANELBOARD TESTING WILL RESULT
IN FAILURE OF ELECTRONIC COMPONENTS.
IL01417001E
