High-precision Medium Voltage Instrument Transformers (12kV-40.5kV). Featuring epoxy resin cast CTs and VTs for metering and protection, fully compliant with IEC 61869 standards.
Bridging the gap between high-voltage grids and sensitive control instruments, our Instrument Transformer Series delivers uncompromised accuracy and safety. Designed for 12kV, 24kV, and 40.5kV power systems, our epoxy resin cast transformers transform high currents and voltages into measurable, safe levels. Whether for revenue-grade metering (Class 0.2S) or critical fault protection (Class 5P20), our products ensure your grid operates intelligently and safely under IEC 61869 standards.
Medium & high voltage CT & PT/VT for substations & switchgear applications
Covering current transformers and voltage transformers, engineered for high accuracy, excellent insulation performance, and long service life.
Ensure Your Grid’s Accuracy Need a specific transformation ratio or burden rating? Please fill out the inquiry form on the right for technical support and pricing.👉
Class 0.5 has an error limit of ±0.5% at rated current. Class 0.2S is a higher precision standard ("S" stands for Special), maintaining ±0.2% accuracy even at low loads (down to 1% of rated current), making it ideal for precise revenue metering where load fluctuates.
It means the CT will maintain a composite error of less than 5% when the primary current is 20 times the rated current. This ensures the protection relay receives an accurate signal even during massive short-circuit faults, preventing relay malfunction.
Never. An open secondary circuit on an energized Current Transformer will generate extremely high voltages (thousands of volts) across the terminals, posing a fatal risk to personnel and causing permanent insulation damage to the CT. It must always be connected to a load or short-circuited.
Yes. We offer multi-ratio CTs with secondary tapping. This allows you to change the transformation ratio by simply connecting to different secondary terminals, providing flexibility for future load growth without replacing the transformer.
Yes. Because gas tightness relies on the perfect bonding between the metal insert and the resin, we perform X-Ray flaw detection to ensure there are no gaps or cracks at the interface, which are common causes of slow gas leaks.
