Rules for the operation of cooling devices for oil - cooled transformers
A, cooler should take their own independent dual power supply, and can automatically switch, when the work of power failure, automatically put into standby power, and issued a sound signal;
?B, the transformer upper oil temperature reaches 55 ℃ or the current reaches 70% of the rated value, the auxiliary cooler automatically input;
E, strong oil cycle air-cooled and strong oil circulating water-cooled transformers, when the cooling system failure to remove all the cooler, allowing the rated load to run for 20 minutes, such as 20 minutes after the top of the oil temperature has not reached 75 ℃, then allowed to rise to 75 ℃ , But in this state the maximum time to run no more than 1 hour.
?F, under normal circumstances, the transformer no-load operation, the cooling device two groups of work, a group of auxiliary, a group of spare, the remaining disabled; transformer low temperature, light load, the four groups of work: a group of auxiliary, a group of spare, the rest Deactivated; transformer high temperature, full load, a group of auxiliary, a group of spare, the rest all into work.
C, work or auxiliary cooler failure after removal, should be automatically put into the standby cooler;
?D, strong oil circulation cooling transformer operation, must be put into the cooler, no load and light load should not put too much cooler (no-load state to allow short-term cast). All the load into the corresponding number of coolers should be in accordance with the provisions of the manufacturer, according to the temperature and load switching cooler automatic device should be kept normal.
