GK Expertise is one of the leading companies for manufacturing transformer relay protection in India. Our transformer relay protection comes with testing of IEC 60255-1, IEC 60255-26, and IEC 60255-27, approved by RDSO, working in hard environments with ingress protection of IP54 and more filters. 

Our own manufacturing Transformer Protection Relays are Numerical Auto Transformer Protection Relay (GK87) and Transformer Differential Protection Relay (GK87TR, GK87T1, and GK87T2).

Transformer Differential Protection Relay for overhead lines of 25 kV and 2X25 kV systems with TI/SPC/PSI/PROTCT/6072 and TI/SPC/PSI/PROTCT/7101 specification, Auto Transformer Protection Relay for overhead lines of 25 kV and 2X25 kV systems with TI/SPC/PSI/PROTCT/7101 specification.