ABB K-Line Plus, Installation And Maintenance Instructions Manual

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K - L i n e P l u s
50
18
TO
36 M
ONTH
I
NSPECTION
Perform the following at 18 to 36 month intervals or sooner if required
by local conditions or regulations.
1.
Clean the circuit breaker stationary primary contacts. See
IB6.2.11.1-1A, “Installation/Maintenance Instructions for Low
Voltage Power Circuit Breakers." Inspect for evidence of
excessive heat, arcing, or corrosion. If found, follow the procedure
described under “Suspect Joint Maintenance” on page 55.
2.
Inspect secondary wiring bundles for signs of discoloration
because of heat or chafing. Check for cracked or embrittled
insulation. Replace wire whenever doubtful.
3.
Inspect primary insulation system for accumulated contamination.
Clean insulation with a dry cloth, dry-air, vacuum, or if necessary
with an OSHA approved solvent.
4.
Check the calibration of protective relays approximately every two
years.
10 Y
EAR
M
AXIMUM
I
NSPECTION
1.
Disassemble, inspect, clean, lubricate, adjust, and calibrate circuit
breaker mechanisms.
2.
Torque all primary conductor connection bolts to recommended
values. See Table 1.
3.
Tighten all secondary control wire connections. Check for loose
lug crimps and broken wire strands.