Instruction Manual
Pow-R-Line Retrofit Panelboards
Page
10
Effective: November 2007
P1R & P2R Retrofit Panels
For more information visit: www.EatonCanada.ca
11/2007
HAZARDOUS VOLTAGE. WILL CAUSE SEVERE
INJURY OR DEATH.
ONLY THOSE PROFESSIONALS TRAINED AND
QUALIFIED ON ELECTRICAL DISTRIBUTION
PANELBOARDS SHOULD INSTALL AND/OR
SERVICE THIS EQUIPMENT.
HAZARDOUS VOLTAGE WILL CAUSE SEVERE
INJURY OR DEATH. DE-ENERGIZE
PANELBOARD PRIOR TO SERVICING.
ONLY THOSE PROFESSIONALS TRAINED AND
QUALIFIED ON ELECTRICAL DISTRIBUTION
PANELBOARDS SHOULD INSTALL AND/OR
SERVICE THIS EQUIPMENT.
Panelboard Insulation Resistance
Testing
Maintenance before Cleaning
Prior to cleaning, perform an initial Megger or DC
test of the panelboard insulation, between phases
and ground. Inspect for symptoms that may indicate
overheating or weakened insulation. Record test
readings. Refer to NEMA publication AB-4
“Guidelines for Inspection and Preventative
Maintenance of Molded Case Circuit Breakers Used
in Commercial and Industrial Application.” Prior to
testing, remove all control power fusing and
connections to products, which will be damaged in
this test. This includes all components with control
wire fusing, Transient Voltage Surge Suppression,
Surge Protective Devices, metering equipment, etc.
Cleaning
While the panelboard is de-energized, remove dust
and debris from bus bars, connections, supports and
enclosure surfaces. A vacuum cleaner with a nozzle
will be of assistance. Wipe clean with a lint-free
cloth. Do not use solvents to clean equipment as
damage to surfaces can occur. Should the
panelboard be exposed to adverse conditions, such
as, airborne contaminants, more frequent
inspections and cleaning may be required.
Use of compressed air to clean or blow out debris in
panelboards may imbed the contaminants within
overcurrent devices, metering equipment and other
components. Damage to insulation and other
surface materials can occur. Do Not Use
Compressed Air in cleaning.
Maintenance after Cleaning
After cleaning, perform a second Megger or DC test
of the panelboard insulation between phases and
ground. Prior to testing, remove all control power
fusing and connections to products, which will be
damaged in this test. This includes all components
with control wire fusing, Transient Voltage Surge
Suppression, Surge Protective Devices, metering
equipment, etc.
DO NOT USE AC dielectric testing.
Test resulting in readings at or above 1 megaohm is
satisfactory.
Compare these test readings with prior readings and
retain with previous testing for future comparisons.
Trends of lowered insulation resistance are signs of
potential problems.
Bus and Cable Connections
1. Inspect bus bar and cables for visible
damage.
2. Visually inspect connections for overheating
and damage.
3. All bus bars and cable connections should
be checked and torque in accordance with
labeling on the panelboard. Refer to
Appendix
Table 2
for torque values.
4. Inspect for broken wire strands and pinched
or damaged insulation on cable connections.
Insulation
All bus bar and structure insulation in the
panelboard including bus supports, bus shields, bus
bracing, insulating barriers, etc., should be visually
checked for damage. Replace damaged parts. The
life of insulation material is dependent on keeping
the material dry and clean.
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 USE ALTERNATING CURRENT (AC)
DIELECTRIC/MEGGER TESTING. DAMAGE TO
COMPONENTS WILL OCCUR.
IL01417001E
