Light transformer checking current relay circuit

Published:2012/11/29 0:24:00 Author:Ecco | Keyword: Light transformer , checking , current relay | From:SeekIC

Lamp transformer usually uses 220/12/24/36 V power supply, and its capacity is 0.5kVA, it is mainly used for temporary lighting (low-voltage lamps). The current relay checking circuit is shown in the figure. According to relevant regulations, quick-break protection in power systems and overcurrent protection in the current relay should be checked on a regular basis once each year. According to the connection shown in above circuit, closing the knife switch QS, slowly adjusting the regulator TA, then the ammeter readings will be gradually increased to the AP KA dial number of current relay.



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