Looking for reliable 11kV current transformers (CTs) for your high-voltage power systems? This guide covers everything you need to know—types, specifications, applications, and pricing—to help you make an informed purchase decision.

What is an 11kV Current Transformer?

An 11kV current transformer is a precision instrument used to step down high currents in power systems to measurable levels for protection, metering, and monitoring. These CTs are essential in substations, industrial plants, and renewable energy systems to ensure safe and efficient power distribution.

Key Features of 11kV Current Transformers

✔ Rated Voltage: 11,000V (11kV)
✔ Primary Current Range: 50A – 5000A
✔ Secondary Output: 1A or 5A standard
✔ Accuracy Class: 0.2, 0.5, 1.0 for metering; 5P, 10P for protection
✔ Insulation Type: Oil-immersed, resin-cast, or SF6 gas-insulated

Types of 11kV Current Transformers

1. Wound Primary CTs – Best for low-current applications (5A-100A).

2. Bar-Type CTs – Used for high currents (200A-5000A), common in switchgear.

3. Window-Type (Ring) CTs – Easy to install around existing conductors.

4. Optical CTs – Advanced, non-conductive sensors for smart grids.

Applications of 11kV Current Transformers

• Energy Metering & Billing (0.2 class accuracy)

• Overcurrent & Earth Fault Protection (5P/10P class)

• Power Quality Monitoring

• Renewable Energy Systems (Solar/Wind Farms)

11kV Current Transformer Price Range

Prices vary based on type, accuracy, and brand:

• Standard Protection CT (5P/10P): $100 – $500

• High-Accuracy Metering CT (0.2/0.5 class): $300 – $1,200

• Resin-Cast or Gas-Insulated CTs: $500 – $2,500+

Factors affecting cost:

• Burden capacity

• IP rating (indoor/outdoor use)

• Brand (ABB, Siemens, GE, local manufacturers)

Where to Buy 11kV Current Transformers?

• Global Suppliers: Alibaba, Schneider Electric, Toshiba

• Local Electrical Distributors (better support & warranties)

• Used/Refurbished CTs (budget option, but inspect carefully)

Conclusion

Choosing the right 11kV current transformer depends on application, accuracy needs, and budget. Compare specs and prices from trusted suppliers before purchasing.

Need the best 11kV CT deal? Contact top manufacturers today!