5
Instruction Leaflet
IL29C119C
Effective August 2011
Installation Instructions for E2F, E2FM Mining Service Circuit Breakers
EATON CORPORATION
www.eaton.com
(Reset)
Trip Setting
Adjusting
Mechanism
ymbol (OFF)
Handle Position
Indicator Color:
Red ON
White Trip
Green OFF
(Reset)
Handle
Fig. 3-1 Circuit Breaker Manual Controls
4.0 INSPECTION AND FIELD TESTING
E molded case circuit breakers are designed to provide
years of almost maintenance-free operation. The follow-
ing procedure describes how to inspect and test a circuit
breaker in service.
Inspection
Circuit breakers in service should be inspected periodi-
cally. The inspection should include the following checks.
WARNING
BEFORE INSPECTING THE CIRCUIT BREAKER IN AN
ELECTRICAL SYSTEM, MAKE SURE THE CIRCUIT
BREAKER IS SWITCHED TO THE
OFF
POSITION
AND THAT THERE IS NO VOLTAGE PRESENT
WHERE WORK IS TO BE PERFORMED. SPECIAL
ATTENTION SHOULD BE PAID TO REVERSE FEED
APPLICATIONS TO ENSURE NO VOLTAGE IS
PRESENT. THE VOLTAGES IN ENERGIZED EQUIP-
MENT CAN CAUSE SEVERE PERSONAL INJURY OR
DEATH.
CAUTION
4.2.
4.3.
4.4.
4.5.
4.6.
4.7.
Remove dust, dirt, soot, grease, and/or moisture
from the surface of the circuit breaker using a
free dry cloth, brush, or vacuum cleaner. Do not
blow debris into circuit breaker. If contamination is
found, look for the source and eliminate the prob-
lem.
Switch circuit breaker to ON and OFF several times
to be sure that the mechanical linkages are free
and do not bind. If mechanical linkages are not free,
replace circuit breaker.
Press the PUSH-TO-TRIP button to mechanically
trip the circuit breaker. Trip, reset, and switch circuit
breaker ON several times. If mechanism does not
reset each time the circuit breaker is tripped,
replace the circuit breaker.
Check base cover and operating handle for cracks,
chipping, and discoloration. Circuit breakers should
be replaced if cracks or severe discoloration is
found.
Check terminals and connectors for looseness or
signs of overheating. Overheating will show as dis-
coloration, melting, or blistering of conductor insula-
tion, or as pitting or melting of conductor surfaces
due to arcing. If there is no evidence of overheating
or looseness, do not disturb or tighten the connec-
tions. If there is evidence of overheating, termina-
tions should be cleaned or replaced. Before
energizing the circuit breaker, all terminations and
cable should be refurbished to the condition when
originally installed.
Check circuit breaker mounting hardware. Tighten,
if necessary.
Check area where circuit breaker is installed for any
safety hazards including personal safety and fire
hazards. Exposure to certain types of chemicals
can cause deterioration of electrical connections.
Field Testing
Any field testing should be done in accordance with
NEMA Standards Publication AB2-1984.
MAKE SURE THAT CLEANING AGENTS OR SOL-
VENTS USED TO CLEAN THE CIRCUIT BREAKER
ARE SUITABLE FOR THE JOB. SOME COMMERCIAL
CLEANING AGENTS WILL DAMAGE THE NAME-
PLATES OR MOLDED PARTS.
2
4.1.
Push-to-trip
Button
International
