Current transformers (CTs) manufactured by SVEL Group are designed to convert high current values to standard levels, ensuring safe and accurate measurement of electrical network parameters. They are widely used in power systems, power plants, industrial and residential installations for energy metering and equipment protection.

Main Functions of CTs:

• Current Transformation: Reducing high primary current to safe levels for subsequent measurement.
• Circuit Isolation: Providing galvanic isolation between high-voltage and low-voltage circuits, enhancing operational safety.
• Signal Transmission: Delivering accurate data to measuring instruments, protection devices, automation, and control systems.

Classification of CTs by Design:

• Support-type Current Transformers: Installed in the break of the busbar and have cast insulation. Example: TOL-SVEL-10.
• Built-in Current Transformers: Mounted directly on the input of a circuit breaker or power transformer. Example: TV-SVEL-110.
• Support-Pass-Through Current Transformers: Combine the functions of support and pass-through devices, providing compactness and versatility.

Technical Specifications:

• Voltage Class: From 0.66 kV to 750 kV.
• Rated Primary Current: From 5 A to 12,000 A.
• Rated Secondary Current: 1 A or 5 A.
• Accuracy Class: For metering and measurements — 0.2S; 0.2; 0.5S; 0.5; 1; 3; for protection — 5P; 10P.