Problem resolution

Steps for resolving your problem

The Electric Power Research Institute (EPRI), an independent non-profit energy research, development, and deployment organization, estimates that power quality disturbances for all business types across the U.S. result in monetary losses totaling between $141.17 billion and $230.43 billion annually.

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

Step 1

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?
  • What alarms or messages did the affected equipment communicate?

Step 2

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.

Step 3

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.

Step 4

Analyze and evaluate all of the information.

Step 5

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.).