Need of Control Transformer in Starter circuits

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Anonymous Poster	Need of Control Transformer in Starter circuits 03/30/2008 9:07 AM
	In one Low Voltage Motor Control Centre Electrical specification, it is written, "Where more than five triple pole contactors are used, a separate control transformer shall be provided".Why it is asking for a Control transformer in such a case? In many cases we are not considering control transformer for starters.
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chaterpilar Power-User Join Date: Aug 2007 Location: Bhopal India Posts: 234 Good Answers: 5	#1 Re: Need of Control Transformer in Starter circuits 03/30/2008 9:22 AM
	Hello Guest, A good question but recommend you to register to enjoy the full benefits of this forum. The Industrial control transformers are specifically designed for high inrush applications requiring reliable output voltage. These transformer are designed to meet industrial applications where electromagnetic devices such as relays, solenoids and other control components are used. Control transformers (also known as machine tool transformers) provide isolation to control components from power surges and lighting circuits, and provide good power regulation under inrush conditions. The inrush current requirement of control elements can be up to 15 times the transformer's nominal rating. While the inrush current is occurring the control transformer keeps the voltage powering the control element as steady as possible. Cheers. __________________ He must be very ignorant as he answers all the questions he is asked. Voltaire
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