Sometimes a few turns in the secondary winding of a transformer experience a partial short, which in turn causes a voltage drop across the secondary. The usual symptom of this cond... Read more
Dry-type transformers are a part of most electrical installations. They range in size from small doorbell transformers to three-phase 25-kVA units installed in electrical closets t... Read more
Lockout/tagout energy sources When electrical systems are de-energized to perform maintenance work safely, precautions must be taken to insure that circuits are not accidentally tu... Read more
Avoid working “live” Electrical testing must often be performed on energized circuits and equipment. But the safest technique for doing tasks such as repairing and replacing faulty... Read more