Current transformers and voltage transformers are core components for metering and protection in high-voltage systems of substations and transformer factories. Transformer performance testing is a mandatory item in commissioning tests, periodic preventative maintenance, and routine factory tests. Tr

Relay protection serves as the primary safety barrier for modern substations. When faults including short‑circuits, overloads and ground faults occur on transmission lines, transformers and busbars, protective relays must quickly detect abnormal conditions and issue trip commands to isolate faulty s

Engineers who have worked in substations know that there is no room for negotiation regarding outage windows. For industrial users, every hour of extended outage time can easily result in tens of thousands of dollars in lost energy. Beyond the direct economic impact, the logistical pressure of resch