Temperature monitor for electrical switchgear

Details Temperature monitor for electrical switchgear Temperature monitor for electrical switchgear

1998-03-09

2000-04-18

Wu, Daniel J.

Communications: electrical

Condition responsive indicating system

Specific condition

340584, 340646, 336 55, 336 57, 336 58, G08B 2100

Patent

active

060520604

ABSTRACT:
Insulating oil in electric power transmission switchgear such as a load tap changer for a transformer is filtered for removal of accumulated water and carbon particles. The filter and associated circulation pump is usually located in a separate cabinet external to the switchgear with circulation conduits connecting the filter, the pump and the switchgear reservoir. To prevent or minimize equipment damage that is presaged by excessive insulating oil temperature, oil flow within the oil circulation conduits is monitored for temperature excesses. Alarms are issued and electrical loads are disconnected upon detection of an excess temperature event. If desired, provision may be made for disconnected the jeopardized equipment from its respective service load.

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