SACT251

An open current transformer (CT) is a specialized device designed to measure current in electrical circuits. Commonly used in power distribution systems, it helps monitor current flow and ensures operation within safe limits. The transformer consists of a primary winding, connected in series with the circuit, and a secondary winding, which provides a measurable output proportional to the current flowing through the primary.

Structure of Open Current Transformer

The open current transformer features a high-strength PVC casing and a fully cast busbar design. It can be directly mounted onto the cable, with three integrated rubber rings providing secure support and insulation. The transformer core is constructed from high-quality silicon steel sheets, while the secondary windings are evenly distributed around the core. Its retractable design allows installation without disconnecting or cutting the cable, making it ideal for retrofit applications.

Applicable Scope of Open Type Current Transformer

Installation Altitude: ≤ 3000 m

Ambient Temperature: -25 °C to +40 °C

Compatible Cable Outer Diameter: φ8 – φ240 mm

Input Current Range: 0 – 60 kA

Output Options: 0 – 500 mA, 1 A, 5 A, 5 VDC, or 4–20 mA (customizable)

Atmospheric Conditions: Free from pollutants, corrosive substances, and explosive gases that could compromise insulation performance

Importance of Open Current Transformers in Industrial Automation

In industrial automation, precise monitoring and control of electrical systems are critical for safety and operational efficiency. Open current transformers (CTs) play a vital role by providing real-time current data, which helps detect faults or anomalies in the system, enabling rapid intervention and minimizing downtime.

These transformers are also essential for tracking power consumption and managing energy usage. By accurately measuring current in electrical circuits, they allow industrial facilities to identify inefficiencies and implement energy-saving strategies, reducing operational costs.

Additionally, open CTs support predictive maintenance by continuously monitoring electrical equipment. Early detection of abnormal currents can indicate wear or potential malfunctions, allowing timely maintenance and preventing costly breakdowns.

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