This case history involves the investigation of a utility transformer failure that occurred in a rural area surrounded mostly by farmland and open space. The failure occurred in a location where power quality problems are rare.
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One winter morning, the electrician received a call from a local school. The caller said a transformer supplying power to three portable classrooms was making a chattering noise, as if something were loose inside.- A small city gets its water from a mountain lake 30 miles away. A pumping system at the lake brings water up a short incline and into a long gravity pipeline that feeds the city's water distribution system.
- The engineer carries a Fluke 43B on all trouble calls, because it provides a graphical display that allows customers to see a picture of the problem.
- In most facilities, lighting is a major element of operating cost. Part of that cost is due to energy, and part is due to maintenance.
- This case history is a classic example of the importance of a systematic approach to solving a problem. It involves a contractor who works with several high-technology manufacturing plants.
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