The СТ(В)-0,66 is a high-precision measuring current transformer developed by NIK-ELEKTRONIKA for industrial and utility applications. Designed to operate at 0.66 kV nominal voltage, this CT supports a broad range of primary currents from 100 A to 2000 A, with a consistent secondary output of 5 A. It is available in three designs with customizable bus-bar configurations using either aluminum or copper conductors. The unit ensures accuracy class 0.5 S, robust insulation, and excellent performance in both standard and demanding environments. With a long service life and flexible mechanical design, this transformer is ideal for reliable current measurement in power distribution systems.
Specifications
Nominal Voltage: 0.66 kV
Maximum Operating Voltage: 0.72 kV
Insulation Level: 3 kV
Nominal Primary Current: 100 A to 2000 A
Nominal Secondary Current: 5 A
Frequency: 50 Hz
Accuracy Class: 0.5 S
Nominal Load (cos φ = 0.8): 5 VA
Safety Factor (FS): 5
Thermal Insulation Class: E
Calibration Interval: 16 years
Operating Temperature Range: -45°C to +40°C
Withstand Current (1 sec): Up to 115 kA depending on rating
Available Designs:
Design 1: Bus-bar port 26×11 mm
Design 2: Bus-bar port 61×11 mm
Design 3: Bus-bar port 101×16 mm
Features
Supports high-current applications from 100 A to 2000 A
Available with pre-installed aluminum or copper bus-bars
Multiple design variants to suit different panel and breaker layouts
High insulation and safety ratings for demanding conditions
Accuracy class 0.5 S ensures precise current monitoring
Long operational life and extended calibration interval
Compact construction ideal for space-restricted installations
Compliant with industry electrical standards and certifications
Applications
Current measurement in industrial switchgear and MCC panels
Utility substations and power distribution boards
Load profiling and energy usage analysis
Integration into SCADA and AMI systems
Monitoring for overload protection 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.
