YOUR PREMIER SOURCE FOR ELECTRICAL TESTING
Our technicians are more than capable of fixing any problems and tackling every challenge. Of course, we can also perform state of the art diagnostics, too. With Buist, we can test, diagnose, and fix transformers, switchgear, panels, power issues, and more.
Regular infrared and transformer testing and visual inspections of your electrical equipment are the best return on investment money that can be spent on predictive or preventative maintenance. We inspect, find and repair issues that could develop in to expensive repairs or even more expensive downtime or power outages. We can locate issues and repair them before they become expensive replacements. Our reports are second to no other that include images from our state of the art camera, detailed locations of issues found, recommendations for the repair of the issue based on our many years of experience and even not heat related electrical or safety issues.
Grand Resistance Testing
Fall of potential testing is utilized to verify adequate grounding at electrical services and equipment installations. Proper grounding should be verified for equipment and personnel protection. A good grounding system will improve the reliability of equipment and can reduce damage due to surges on the system.
Installation Resistance Testing
Insulation tests are used to determine the quality or condition of the insulation systems of electrical equipment. When performed properly, the testing will indicate a failing insulation system, before a fault occurs.
In a typical hipot test, high voltage is applied between a product’s current-carrying conductors and its metallic shielding. The resulting current that flows through the insulation, known as leakage current, is monitored by the hipot tester. This is typically a pass or fail test and is not encouraged on existing medium voltage cable.
Transformer Turns Ratio Testing
The proper voltage of a transformer relies almost entirely on the electrical properties of its windings. With this test, transformers are tested to verify that their electrical properties have not changed from design specifications. The TTR test applies voltage to the high voltage winding of a transformer and accurately measures the resulting voltage from the low voltage winding. In addition to turns ratio, the unit measures excitation current, phase angle deviation between the high and low voltage windings and percent ratio error.
Primary Injection Breaker Testing
High current with low voltage is applied via a breaker test set to the breaker and multiple tests are then performed to ensure the breaker and trip units are operating as designed. Measure insulation resistance for one minute on each pole, phase to phase and phase to ground with breaker closed and across each open pole. Measure contact pole resistance on each respective phase. Ensure readings fall within manufactures recommended tolerances.
Protective Relay Testing
Mechanical or electronic, Typically found in substations and larger plants, Time Overcurrent, Reverse Power, Over under voltage, Over under frequency, Ground directional, Sync check, Distance relays