A sure way to demoralize and frustrate maintenance electricians is to let power quality problems go unaddressed. Perhaps some of the following examples echo what goes on in your facility:
- Bob replaced a particular motor three times in the past year. Each time, he noted on the repair ticket that voltage imbalance was 6% and causing the motor to overheat. But nothing has been done. Bob says the company acts as if his work does not matter.
- A few years back, the plant installed power factor (PF) correction capacitors at the service to avoid a PF charge from the utility. However, as every maintenance electrician has pointed out (and so has the utility engineer for the area), the company is still paying for low PF in the plant. Transformers run hot and motors overheat to failure. The plant is paying extra to overheat equipment.
- Excess triplen harmonics have caused avoidable equipment damage. The electricians want a root cause analysis and solution, but the plant engineer will not commission one.
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