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Section 7—Maintaining the Switchboard
Power-Style™ QED-2 Switchboards
43
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e. Remove all fuses. Retain the hardware for reuse.
f. Using a non-abrasive cleaner such as Lectra-Clean, made by CRC, wipe
clean the fuse mounting pads on the switch and the terminals of each new
fuse. Check the alignment of fuse terminals before installing new fuses.
g. Install new fuses using the same hardware removed in Step e. Tighten to
21–30 lb-ft (28–41 N•m).
4. Close the fuse door, and check the fuse door interlock with the switch in the ON
position. The fuse doors should not open using normal hand force.
Circuit Breakers
Schneider Electric circuit breakers are designed and manufactured as sealed units
requiring minimal periodic maintenance.
Exercise circuit breakers at least once a year to ensure proper operation. For
general maintenance:
1. Trip the circuit breaker by pushing the Push-To-Trip or “Open” button located
on the face of the circuit breaker. Refer to the appropriate circuit breaker
manual for the specific location of this button.
2. Manually open and close the circuit breaker two to three times.
NOTE:
Schneider Electric instruction bulletin 48049-900-0x,
Field Testing and
Maintenance Guide for Thermal-Magnetic and Micrologic™ Electronic Trip
Molded Case Circuit Breakers
, provides more in-depth information.
Figure 31 – PowerPact™ R-Frame Circuit Breaker