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