How should a generator be inspected during a semi-annual inspection?

The most effective method for inspecting a generator during a semi-annual inspection involves testing its performance under conditions that simulate its actual usage. By testing the generator under facility load while experiencing a loss of commercial power to the Automatic Transfer Switch, you can determine how well the generator responds to real operating conditions. This ensures that the generator not only starts up correctly but also maintains its output level and reliability when it is needed most.

This method is crucial as it enables the inspection of critical components, such as the Automatic Transfer Switch, ensuring that it correctly transfers the power load during an outage. Observing the generator in a load situation helps to uncover any potential issues that are not evident during a simple visual inspection, such as operational deficiencies or performance problems.

In contrast, running a full load for two hours, while valuable, does not simulate an emergency scenario where commercial power is lost, and the generator takes over. Checking for leaks and corrosion, while important for maintenance and longevity, does not provide insights into functional performance. Lastly, replacing all fluids and filters is essential but is part of routine preventative maintenance rather than an inspection geared toward operational performance. Thus, testing under facility load reflects a more comprehensive evaluation of the generator’s readiness and reliability.