GLOBAL ELECTRICALS TRADERS provides the complete information about mounting & operating of breakers, fuses and other key elements in CSP transformers.
The circuit breaker is typically mounted inside the transformer oil above the Active Part (core and coil assembly_CCA). The breaker is operated by handle mounted externally for Open -> Close -> Reset. See the below link(s) for OICB mounting and operating instructions. If need more information about our products, please contact our sales representative anytime. We are happy to serve you all the times.
A low-voltage breaker trips and protects the transformer.
Specification for Star-Rated Transformers published by Central Electricity Authority: