Commercial Power Quality FAQs

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What causes power quality problems?

Most causes can be divided into internal and external causes.
Potential culprits may include large equipment start-up or shutdown, improper wiring and grounding, overloaded circuits or harmonics.
The most common cause is a lightning strike; other possibilities include equipment failure, vehicle accidents, weather conditions, neighboring business, and even normal operation of utility equipment.

What kind of equipment is vulnerable?

Most electrical equipment is affected by variations in powering and grounding. High-tech equipment, such as computer networks and phone systems, are sensitive and may be susceptible to damage.

How is a power quality problem diagnosed?

Sophisticated monitoring and testing are usually required to isolate the specific type of disturbance and pinpoint the cause. A thorough power quality investigation might include:
- On-site testing
- Grounding studies
- Infrared Scans
- Wiring verification
- Identification of load characteristics

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