OLTC Transformer

( capacity 250 KVA - 5000 KVA)

OLTC Distribution Transformer

On load tap changer (OLTC) is used with higher capacity transformers where HT side voltage variation is frequent and a nearly constant LT voltage is required. OLTC is coupled with the transformer itself. Multiple tapings from HV windings are brought to the OLTC chamber and connected to fixed contacts. Moving contacts rotates with the help of rotating mechanism usually a Geneva mechanism having a spindle. The spindle can be rotated manually as well as electrically with a motor. Motor is connected in such a way that it can rotate in both the directions such as to rotate the OLTC moving contacts clockwise and anti clockwise. Two push buttons are fitted on the LCP (low control panel) to rotate the motor and hence the OLTC contacts. This movement of contacts thus controls the output LV voltage of the transformer. So rotating of the OLTC contacts with spindle or push button in this way is manual process. In case this process of rotating the OLTC contacts and hence controlling the LV side voltage is to be done automatically then a RTCC (remote tap changer controller) is installed with the transformer ht panel. The RTCC panel which has sensors which sense the output voltage and accordingly sends signal to LCP and LCP in turns rotates the motor as per signal received from the RTCC.

Features :

  • The Distribution Transformer with OLTC is low on maintenance and is fitted with a Digital IC controlled circuit that makes the stabilizers automatic. 
  • These transformers can protect the equipment and electrical appliances against any voltage fluctuations and variations. It operates with delay relay mode and is a compact design unit. 
  • Highly recommended for continuity of electrical deviceā€˜s safety and maintenance and hence used in Air conditioners and Refrigerators. 
  • These units hold a range of features, they are in great demand for residential applications for securing Refrigerator, Deep freezer, Bottle and water coolers, BOD incubators, Air conditioning appliances from voltage fluctuation. We at Tate Electricals, we are a quality concerned brand and do not compromise with the value while production or manufacturing process is ongoing and even the final dispatch is done under the supervision of technical specialists.


  • Chemical plant, Bottling plant. 
  • Paper mills, Sugar mills, Rolling mills, Steel mills. 
  • Industries which rely heavily on automation, where electronic cards, PLC and VFDs are used in operations and actuation.

Providing Premium OLTC Transformer At Reasonable Price Ranges! Choose from the Leading OLTC Transformer Suppliers in India. :

    • The trust our clients put in us, and the honor of serving such prestigious businesses motivate us to consistently enhance our products and services. The unrivaled quality and reliability of our products show our expertise and command over the smallest elements of these machines. Furthermore, the experience and technology we have accumulated over the years have benefited our clients worldwide. We have made some client-oriented policies to ensure a safe supply of our products. Our professional team always checks the quality of the end product before supplying them to clients. We have emerged as the number one OLTC Transformer Supplier in India because we supply products with top quality and precision.