Eaton Cutler-Hammer ATVSKDA30300XSU, Instructions Manual

Page: 35 / 40

I.B. ATS-V003
Page 29
Effective 6/98
Table 7.1 Periodic Maintenance Procedures
a. Make transfer switch equipment safe for Disconnect line power from equipment being serviced by
inspection and/or maintenance. opening next highest disconnect device. Make certain that
any accessory control power is switched off by disconnect-
ing all logic plugs.
b. Inspect structure area for safety hazards or Inspect area, especially where molded case switching
potential maintenance problems. devices are installed, for any safety hazards, including
personnel safety and fire hazards. Exposure to certain
chemical vapors can cause deterioration of electrical
connections.
Inspect for accumulated dirt, loose hardware or physical
damage.
Examine primary insulation for evidence of cracking or
overheating. Overheating will show as discoloration,
melting, or blistering of conductor insulation, or as pitting
or melting of conductor surfaces due to arcing.
Inspect secondary control connections for damage, and
control wiring for insulation integrity.
c. Inspect molded case switching devices for dust, Remove dust, dirt, soot, grease, moisture and corrosion
dirt, soot, grease, moisture or corrosion. contamination from the surface of the switching device
using a dry soft lint-free cloth, dry soft bristle brush and
vacuum cleaner. Do not blow debris into circuit breaker or
nearby breaker structure. If contamination is found, look for
the source and fix the problem.
d. Check for material integrity, uneven wear, Severe material cracking will require replacement and
discoloration or loose hardware. loose hardware will need to be tightened.
e. Check terminals and connectors for looseness Overheating will show as discoloration, melting, or
or signs of overheating. blistering of conductor insulation.
Connections that do not have signs of looseness or
overheating should not be disturbed.
f. Exercise the molded case switching devices If a switching device is used for frequent switching during
if they are not often exercised while in normal operation, this step can be disregarded.
operation. This will permit wiping action by the
contacts.
g. Return transfer switch equipment to service. Make certain all barriers are in place and doors closed.
Re-apply secondary and primary power.
Step Action