CT120-Series Current Transformer

About CT120-Series Current Transformer

The CT120-Series Current Transformer is a precision electrical measuring device used to measure AC current safely and accurately. It works by converting a high primary current into a smaller, proportional secondary current that can be connected to an ammeter, energy meter, protection relay, or other monitoring equipment.

This window-type CT has a large central opening through which a cable or conductor can pass, allowing current measurement without directly connecting the measuring instrument to the high-current circuit. The product shown is specified for 5A to 120A primary current, with 5A standard secondary output, 0.5S accuracy class, 3 kV/1 min insulation level, and 50/60 Hz frequency as shown in your supplied specification image.

Current transformers are commonly used with metering and protection equipment in commercial and industrial electrical systems. CTs with 5A or 1A secondary outputs are designed to interface with standard meters and relays.

Uses

• Current Measurement: Measures AC current flowing through electrical cables and conductors.
• Control Panels: Used for monitoring current in industrial control panels.
• Energy Meters: Provides a reduced current signal to energy/power meters.
• Protection Systems: Can be connected to protection relays for electrical-system monitoring.
• Power Distribution: Used in distribution boards and electrical distribution systems.
• Industrial Machinery: Helps monitor the current drawn by machines and equipment.
• Generator & Electrical Panels: Used for monitoring generator and electrical-system current.