46
carbon in suspension or in the bottom of the tanks. (Refer to FIST Volume 3-5,
Maintenance of Liquid Insulation - Mineral Oils and Askarel.)
Maintenance of Liquid Insulation - Mineral Oils and Askarel.)
Operation
* Some breakers, particularly those carrying high values of current, have a tendency
to develop contact heating if left closed for long periods. Opening and closing
breakers several times at intervals, as system operation permits, may reduce
heating by wiping the oxide from the contact surfaces. This method also
demonstrates that the breaker is in operating condition.
breakers several times at intervals, as system operation permits, may reduce
heating by wiping the oxide from the contact surfaces. This method also
demonstrates that the breaker is in operating condition.
References
How to Maintain Electric Equipment, GET-1125, General Electric Company
FIST Volume 3-1, Testing of Solid Insulation of Electrical Equipment
FIST Volume 3-2, Testing and Maintenance of High Voltage Bushings
FIST Volume 3-5, Maintenance of Liquid Insulation - Mineral Oils and Askarel
FIST Volume 3-7, Painting of Transformers and Oil Circuit Breakers
FIST Volume 3-16, Maintenance of Power Circuit Breakers
FIST Volume 3-17, Power Circuit Breaker Problems
FIST Volume 3-18, Replacing Glaze Burned Insulators
FIST Volume 3-1, Testing of Solid Insulation of Electrical Equipment
FIST Volume 3-2, Testing and Maintenance of High Voltage Bushings
FIST Volume 3-5, Maintenance of Liquid Insulation - Mineral Oils and Askarel
FIST Volume 3-7, Painting of Transformers and Oil Circuit Breakers
FIST Volume 3-16, Maintenance of Power Circuit Breakers
FIST Volume 3-17, Power Circuit Breaker Problems
FIST Volume 3-18, Replacing Glaze Burned Insulators