Transcription of 8. TESTING POWER TRANSFORMERS
{{id}} {{{paragraph}}}
8. TESTING POWER TRANSFORMERS High-voltage TRANSFORMERS are some of the most important (and expensive) pieces of equipment required for operating a POWER system. The purchase, preparation, assembly, operation and maintenance of TRANSFORMERS represent a large expense to the POWER system. OVERVIEW When TRANSFORMERS are received from the factory or reallocated from another location it is necessary to verify that each transformer is dry, no damage has occurred during shipping, internal connections have not been loosened, the transformer s ratio, polarity, and impedance agree with its nameplate, its major insulation structure is intact, wiring insulation has not been bridged, and the transformer is ready for service.
transformers should be Meggered at 250 or 500 VDC. Meggering transformer wiring is emphasized because of the numerous small terminal boxes mounted on large power transformers. Conduit connecting them together can have moisture accumulation or water leaks. In addition, when wiring is pulled through the
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document:
{{id}} {{{paragraph}}}