Steps for resolving your problem
The Electric Power Research Institute, a consortium supported by utility companies, estimates that power failures cost the
United States economy $104 billion a year and that power quality problems such as transients, swells and sags cost an
additional $15 billion.
When power quality problems are suspected in a facility, a number of systematic and cost-effective steps should be taken
to resolve the problems including:
Steps to troubleshooting
Make an inventory of all equipment in the facility, noting all equipment vulnerable to a disturbance.
Create a disturbance log and enter the symptoms experienced.
- What equipment was affected?
- What was the time and frequency of occurrence?
- What was the correlation to other events or operations in the facility?
- What new equipment has been added or what changes in existing equipment have occurred?
Inspect wiring and grounding by checking for loose connections, defective breakers or fuses, and short circuits.
- Determine if new circuits have been added or if existing circuits have been modified.
- Examine the circuit to the affected equipment, particularly the grounding and circuit capacity.
Share preliminary information gathered in steps 1 to 3 with the electric utility company and inquire on potential
correlating utility events. Perform measuring and monitoring of the circuit voltage and current with an adequate power quality monitor.
Analyze and evaluate all of the information.
Resolve the problem by implementing appropriate solutions.
- Enlist the services of the equipment supplier to examine the equipment.
- Take steps to ensure that wiring and grounding are proper.
- Provide surge protection on all circuits with sensitive equipment.
- Evaluate the need for additional power quality equipment (isolation, regulation, UPS, etc.).