Control Transformers
Description: Innovative power solutions are offered including a range of control transformers. This is a transformer that supplies power to control and/or auxiliary equipment not intended for direct connection to the main source. Control transformers are specifically used to provide control supply voltage for the control circuits of AC motor starters, that is, starter coils, timers and indicating lamps electronics protection relays. Control transformers for contractor applications have to energise the coil and maintain a contact for definite period of time. The initial energising of the coil takes 5 to 40 milli seconds and requires 3 to 10 times the normal current. While calculating the VA rating of the control transformer, this factor should be taken into account. They are available for single-phase and three-phase inputs and are in the range from 15 VA to 30 kVA. Construction: control transformers are two winding transformers with both windings made of copper. Power house transformers are made of using high quality materials. Electrolytic grade super enamelled wire with best insulations are used. Core materials are CRGO El or strip cores. Experienced hands with best machines for winding ensures best results with minimum size. Appropriate class of insulation materials are used. Transformers are impregnated in insulating varnish for longlasting performance. Input and out are terminated on Bakelite board with proper size of terminals.
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