The inspection and testing performed on an electrical power system and its components prior to initial energization is perhaps the most important preventive maintenance that the system will receive during its operational life.
Performing acceptance testing can greatly reduce many of the problems that arise during the initial start up of the system, especially in the first year of service. There are a number of problems that can be uncovered during this testing. Equipment can be damaged during shipment or installation. Wiring or design errors, improperly coordinated or poorly calibrated protective devices are just a few problems that can occur at start-up.
Acceptance testing determines if the equipment was installed properly using the manufacturers’ recommended settings. This testing identifies and removes defective equipment before it is placed in service. And very importantly, it establishes the baseline test results that are used throughout the life of the power system.