Specifications include, but are not limited to: Visual and Mechanical Inspection o Inspect physical and mechanical condition. o Inspect anchorage, alignment, and grounding. o Verify that all maintenance devices are available for service and operating the breaker. o (*) Perform operator analysis (first trip) test. o Prior to cleaning the unit, perform as‐found tests. o Clean the unit. o Inspect vacuum botile assemblies. o Measure critical distances such as contact gap as recommended by manufacturer. o If recommended by the manufacturer, slow close/open the breaker and check for binding, friction, contact alignment. Contact sequence, and penetration. o Perform all mechanical operation tests on the operation mechanism in accordance with manufacture’s published data. o Inspect bolted electrical connections for high resistance using one or more of the following methods: Use of a low-resistance ohmmeter in accordance with section 7.6.3.B.1. Verify tightness of accessible bolted electrical connections by Calibrated torque-wrench method in accordance with manufacture’s Published data. In absence of published data, use table 100.12. Perform a thermographic survey in accordance with section 9. o Verify cell fit and element alignment. o Verify racking mechanism operation. o Inspect vacuum bellows operation. o Use appropriate lubrication on moving current‐carrying parts and on moving and sliding surfaces. Electrical Test: • Perform resistance measurements through bolted connections with a low-resistance ohmmeter in accordance with Section 7.6.3.A.11.1. • Perform insulation-resistance tests for one minute on each pole, phase-to-phase and phase- to-ground with circuit breaker closed and across each pole with the breaker open. Apply voltage in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.1. • Perform a static contact/pole-resistance test. • With breaker in a test position, perform the following tests: • Verify mechanism charge, trip-free, and anti-pump functions. • Perform a vacuum bottle integrity (dielectric withstand voltage) test across each vacuum bottle with the breaker in the open position in strict accordance with manufacturer’s published data. • and the poles not under test grounded. Test voltage should be in accordance with manufacturer’s published data. In the absence of manufacturer’s published data, use Table 100.19. • Verify operation of heaters.
