The СТ-0.66 measuring current transformer by NIK is engineered for precision current measurement in low-voltage electrical systems. With a nominal voltage of 0.66 kV, this CT is ideal for use in energy metering, monitoring, and protection systems. It supports a wide range of primary currents from 100 to 600 A, delivering a standardized secondary current of 5 A. Manufactured with high-quality insulation and robust construction, the CT provides high accuracy (class 0.5 S), long service life, and stable performance across various temperature conditions. This transformer is essential for accurate and safe current measurement in industrial and utility environments.
Specifications
Nominal Voltage: 0.66 kV
Maximum Operating Voltage: 0.72 kV
Insulation Level: 3 kV
Nominal Primary Current: 100 A to 600 A
Nominal Secondary Current: 5 A
Frequency: 50 Hz
Nominal Load (cos φ = 0.8): 5 VA
Accuracy Class: 0.5 S
Safety Factor (FS): 5
Thermal Insulation Class: E
Calibration Interval: 16 years
Operating Temperature Range: -45°C to +40°C
Mounting Options: Panel or rail mounting
Climatic Category: Suitable for indoor standard environmental conditions
Features
Wide range of primary current options from 100 A to 600 A
High accuracy class 0.5 S ensures reliable energy measurement
Built with durable E-class insulation materials for thermal endurance
Compact and easy-to-install design for switchboards and panels
Long calibration cycle of 16 years, reducing maintenance efforts
Robust build suitable for industrial and utility-grade applications
Multiple mounting formats for flexible integration into control systems
Applications
Precision current measurement in smart metering systems
Industrial switchgear and distribution panels
Utility substations and low-voltage control equipment
Integration with AMI and SCADA systems
Current sensing in load analysis and energy audits
About the Manufacturer
NIK is one of the largest energy technology enterprises in Eastern Europe, established in 1997. The company specializes in the design and production of advanced metering systems, industrial controllers, and integrated AMI solutions. With an in-house engineering and R&D department, NIK delivers innovative energy management tools for utilities, businesses, and infrastructure projects.
