Current Transformers for 252kV Voltage Class

The 252kV current transformer (CT) is core primary equipment in 252kV high-voltage power transmission and transformation systems. Serving as a crucial component for grid current monitoring, metering and billing, and relay protection, it is widely deployed at busbars, main transformer sides, outgoing feeder bays, and transmission line terminals within 252kV substations. Based on the principle of electromagnetic induction, it transforms primary currents of thousands of amperes into standard secondary currents of 5A or 1A according to a standard transformation ratio. This provides highly accurate current signals for secondary measurement and control, metering, and protection devices. Furthermore, it achieves electrical isolation between the primary high-voltage circuit and the secondary low-voltage circuit, fundamentally ensuring the safety of secondary equipment and operation and maintenance (O&M) personnel. It is essential foundational equipment for achieving safe and stable operation, fair and accurate metering, and rapid fault clearing in the 252kV power grid. Additionally, it is a core supporting component for regional grid interconnections, step-up grid integration of renewable energy, and large-scale industrial power distribution.