What steps should you follow when determining whether there are harmonic problems in single-phase systems?
What will be an ideal response?
There are several steps that can be followed in determining whether there is a problem with harmonics. One step is to do a survey of the equipment. This is especially important in determining whether there is a problem with harmonics in a single-phase system.
| 1. | Make an equipment check. Personal computers, printers, and fluorescent lights with electronic ballast are known to produce harmonics. Any piece of equipment that draws current in pulses can produce harmonics. |
| 2. | Review maintenance records to see whether there have been problems with circuit breakers tripping for no apparent reason. |
| 3. | Check transformers for overheating. If the cooling vents are unobstructed and the transformer is operating excessively hot, harmonics could be the problem. Check transformer currents with an ammeter capable of indicating a true RMS current value. Make sure that the voltage and current ratings of the transformer have not been exceeded. |
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