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Calibration
• Testing • Maintenance
Regular inspection and maintenance of relaying is essential in protecting your
electrical system from damage due to faults. A peculiar difficulty of protective
relays is that the time between operations may be measured in years, during which
period defects may have developed unnoticed until revealed by the failure of
the protection device to respond to a power system fault.
A quality maintenance and testing program can help reduce mis-operations, nuisance
trips, and aid in identifying system coordination issues. The periodic maintenance
tests will insure continued reliability, accuracy limits, levels of deterioration
of components, correctness in tripping circuit connections, adopted settings
and fatal failure of a protective relay.
ETMI utilizes computer controlled test equipment to insure the highest level
of accuracy and repeatability.
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