Function:
 

 Control Transformers are specifically used to 
 provide control supply voltage for the control
 circuits of AC motor starters, i.e. Starter coils,
 timers, indicating lamps electronics protection
 relays etc.

 Control Transformers for contractor applications
 have to Energize the coil and Maintain a
 contact for definite period of time. The initial
 energizing of the coil takes 5 to 40 mil. seconds
 and requires 3 to 10 times the normal current.
 While calculating the VA rating of the Control
 transformer, this factor should be taken in to
 account.

 They are available for single phase and three
 phase inputs and are in the range from 15 VA to
 30 KVA.

 

Application:

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 enameled wire with best
insulations are used. Core material are CRGO
EI 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 long
lasting performance. Input and out are 
terminated on Bakelite board with proper size 
of terminals.

Information required while ordering:

A) Input supply- Voltage, Frequency and Number of Phases i.e. Single or
                       three Phases. In case of Three Phase system Type of
                       connection- Star / Delta / Vector group.

B) Out put-voltage and current in of each secondary winding( if multiple
                output windings are required).

C) Class of insulations

D) Service conditions if other than standard service conditions.