TS 970 Transfer Switch
PM163 REV 0 20/02/05 15 Thomson Power Systems
To maintain electrical integrity, ensure that:
• All electrical connections, especially power connections, are clean and adequately
tightened. Corroded or loose power connections will cause destructive heating and
may cause premature tripping.
• All insulating devices are in place and in good condition.
• No moisture or other contamination is present.
• Electrical conductors are adequately secured away from moving parts.
To maintain operational integrity, ensure that:
• All control devices are in good condition and correctly calibrated.
• All control devices including TSC 900 connectors are adequately secured in their
plug-in fixtures.
6.2. RECOMMENDED MAINTENANCE
Only qualified personnel should undertake Service work. Failure to correctly maintain an
automatic transfer switch may present a hazard to life and equipment. Full operational testing
must be done prior to placing a transfer switch in service subsequent to any maintenance or
repair. Any service work involving electrical components requires high-potential testing to
ensure that required insulation levels have been maintained.
• Do not perform dielectric tests on the equipment with the control components in the
circuit.
• Check if control components are tight in sockets.
• Periodically inspect all terminals (load, line and control) for tightness. Re-torque all
bolts, nuts and other hardware. Clean or replace any contact surfaces which are
dirty, corroded or pitted.
• Transfer switches should be in a clean, dry and moderately warm location. If signs
of moisture are present, dry and clean transfer switch. If there is corrosion, try to
clean it off. If cleaning is unsuitable, replace the corroded parts. Should dust and/or
debris gather on the transfer switch, brush, vacuum, or wipe clean. Do not blow dirt
into power contactor unit.
• Test the transfer switch operation. While the unit is exercising, check for freedom
of movement, hidden dirt, corrosion or any excessive wear on the mechanical
operating parts. Ensure that the power contactor unit operate without excessive
noise.
• Verify all program settings on the TSC 900 Controller are as per the programming
sheet supplied with the transfer switch.
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