ACT (RS) ABB Loco (English) (10. MAIN TRANSFORMER )

January 10, 2021, 11:58 AM
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Main Transformer 
 
General: 25 KV, 1-phase, AC Supply is taken from OHE catenary/ contact wire through pantograph, roof equipment and VCB (DJ). The same supply is fed to charge the “ parallel induction transformer” where it is stepped down to different operating voltage. .
 
The tank is filled with transformer oil: 
 
• In order to increase the insulation strength and 
• So that the arising heat loss can be dissipated through the circulating oil 
 
The two parallel oil circuits with pumps and heat exchangers are provided 
 
A spy glass is provided in each machine room to check the oil level of transformer oil. 
 
There are 3 secondary winding: 
 
a.Convertor secondary winding/Traction winding(4 nos.) 
 
b.Aux. Convertor secondary windings.(1 no.) 
 
c.Harmonic filter secondary winding.(1 no.) 
 
 
 
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