Why Current Transformer (CT) Pre-Testing Is Critical for Reliable Power System Performance
Current transformers play a critical role in protection and metering systems. If a CT isn’t performing as expected, it can impact relay operation, measurement accuracy, and ultimately the reliability of the entire electrical system. Pre-testing helps verify: – Correct polarity and ratio – Proper wiring and connections – Insulation integrity – Overall CT condition before […]
Reduce Transformer Failure Risk with Pre-Installation Bushing Testing
Never assume a new bushing is an acceptable bushing… Pre-installation testing can identify: • Elevated power factor / dielectric losses • Capacitance abnormalities or mismatches between phases • Shipping or handling damage • Manufacturing defects before they become field failures A few minutes of testing prior to installing and vacuum filling can save a lot […]
What’s Happening Inside Your Transformer?
Mineral oil is the lifeblood of a transformer and is by far the dominant fluid used in transformers. There are many reasons why mineral oil is used as an insulating fluid in transformers. One, it is an excellent dielectric medium for insulating the components within the transformer, and two; it is a good heat transferring […]
Preventing Moisture Damage with a Transformer Heat Run
What is a heat run on a transformer, and why do we perform it? Recently we were asked this question, and it’s a great one, because heat runs are a critical step in ensuring transformer reliability and long term performance. When a transformer is under vacuum for an extended period, something interesting happens with moisture: […]
