CAST RESIN TRANSFORMER

 

CRT

General Information :

 

 Cast Resin Transformers are dry type transformers, supplied in sheet steel enclosure suitable for either indoor or outdoor installation and are Air Natural (AN) cooled. Higher ratings for hot environment are supplied with Forced cooling as well. They are suitable for cable termination on HT side and LT side. Bus-Duct termination also offered on LT side.

 Applicable standards

Complies with IS 2026 / IS 11171.

Application
  • High-rise buildings, congested sub-station locations
  • Under ground excavations, tunnels, metro railway networks
  • Package Sub-stations
  • Fire hazard areas like mining, oil and gas fields, etc.
Product Features
  • It is compact and maintenance free
  • Resin casting provides much better dielectric strength and short circuit withstand capability
  • It has negligible partial discharge due to epoxy casting under specialized vacuum process with HV/LV winding separately cast
  • The foil winding in LV makes it withstand higher short circuit forces owing to negligible axial force components
  • Off circuit Tap changing links are a standard feature. Dry Type On-load Tap changing Gear can also be supplied
Advantage
  • Non-hygroscopic epoxy casting under HPG technology
  • Highly stable under short circuit conditions us Copper foil winding on LV side (above 500kVA)
  • Low noise as step lap joints used in core construction
  • High Impulse and High Short Circuit Strength
  • Finds excellent application in high rise buildings where USS is employed