GE Industrial Solutions EntelliGuard 3200–5000 A Frames, 240–600 Vac - Manual (Page 22)

EntelliGuard™ 3200–5000 Ampere Power Circuit Breakers
Chapter 5. Maintenance
14
5.1 Inspection
The circuit breaker should be inspected at least once every
two years. More-frequent inspections are recommended
when the breaker is employed under unfavorable
conditions such as severe load, dust, moisture, a large
number of operations, or if the vital nature of the load
warrants it.
Always inspect the breaker after it has interrupted a short
circuit or ground fault.
WARNING: Before inspecting the breaker, dis-
connect it from all voltage sources.
AVERTISSEMENT: Débrancher le disjoncteur
de toutes sources de courant avant de
l’inspecter.
The following checks should be made, with the breaker
drawn out to the TEST position.
1. Manually operate the breaker several times, check-
ing for obstructions or excessive friction.
• To charge the mechanism springs, pull the oper-
ating handle down until it stops (about 90°) eight
times. The charge indicator will show CHARGED
on a yellow background.
• Depress the CLOSE button on the front of the
breaker. The springs should discharge and, if the
latch is properly reset, the breaker will close.
2. Check electrical operation of all installed accessories
and the motor-charge system, if so equipped.
3. Remove the arc chutes, then inspect the arc chutes
and contacts for breakage or excessive burning. For
the proper procedure for removing and reinstalling
the arc chutes, see DEH204.
4. Check insulating parts for evidence of overheating
and for cracks that may indicate thermal aging.
5.2 Lubrication
Bearing points and sliding surfaces should be lubricated
with a thin film of GE Lubricant D6A15A1 (MobilGrease
28, catalog number 193A1751P1). Clean the surfaces to be
lubricated with an industry-approved solvent.
Note: Remove all excess lubricant with a clean, lint -
free cloth to avoid accumulation of dirt or dust.
The contact surfaces of the primary disconnect fingers
should be cleaned and lubricated with GE Lubricant
D6A15A1.
Note: Do not lubricate the main, intermediate, or
arcing breaker contacts or the outside diameters of
rollers. Also, do not lubricate the ground radius on
the closing prop or trip latch, as this will cause
accumulation of dirt and dust.
5.3 Maintenance Publications
See DEH204 for detailed maintenance procedures and
DEF005 for available renewal parts.