Electrical testing

Bulstech provides and performs preventive maintenance of power transformers or components in accordance with manufacturer instructions to identify and correct potential problems before they affect operation or longevity.
The most effective preventive programs are oil sampling and testing, electrical testing and visual inspection. Together, these methods provide the information needed to establish the condition of the transformer and determine the necessary action in order to assure reliability and optimal performance of the equipment.

Some of the tests that we can preform on site:

• Insulating Resistance Value (DC Megger)
• Power Factor (tests of winding & bushings)
• SFRA
• Transformer LTC Position Indicator
• Transformer LTC Controller
• Winding Resistance
• Relationship of primary and secondary voltages (TTR)
• CT / VT testing

Test results are compared to manufacturer specifications. The results establish a baseline for comparison with future tests. Any repairs or calibration needed to bring equipment up to specification can be identified. Post-repair testing assures that proper corrective action has been taken.
In many cases, testing identifies the need for simple repairs and adjustments that may prevent costly repairs and downtime in the future.