China LXK-Φ Series Zero Sequence Current Transformer - Reliable Earth Fault Detection by Trusted Suppliers and Factory

This specialized transformer is designed to monitor and protect electrical systems from ground faults. Its core function is to detect the current vector flowing through its window in a multi-core cable. When an imbalance occurs due to a ground fault, it precisely converts the fault current into a measurable, isolated secondary signal. This output signal is then used to trigger protective relays, circuit breakers, or alarm systems, thereby quickly isolating the faulty circuit, preventing equipment damage, fire hazards, and ensuring personnel safety.

The LXK-Φ Series is suitable for a wide range of indoor and outdoor applications where reliable earth fault protection is required. It is commonly installed in power distribution cabinets, switchgear panels, generator protection systems, and motor control centers across industries such as manufacturing, data centers, renewable energy plants (solar/wind), and commercial building electrical rooms. Its wide operating temperature range makes it adaptable for use in both controlled indoor environments and more demanding outdoor or industrial settings subject to temperature variations.

• Flexible Sizing & Compatibility Available in six standard window diameters (Φ80, 120, 140, 160, 200, 240mm) to accommodate a wide range of cable sizes and bundles, ensuring versatile application across different system designs and simplifying installation.
• High-Range Fault Detection Features an exceptionally high rated expanded current of 120 times the primary current (120In), allowing it to accurately measure and withstand severe fault currents without saturation, ensuring reliable relay operation during major earth faults.
• Robust & Durable Design Engineered for harsh conditions with a wide ambient temperature operating range of -35℃ to +55℃ and a power frequency withstand voltage of 3kV for 1 minute, ensuring long-term stability and performance in demanding environments.
• Dual Frequency & Output Compatibility Supports both 50Hz and 60Hz power systems, offering global application versatility. Options for 1A or 5A secondary current outputs, making it compatible with a broad array of international protective relays and measurement devices.
• Standardized Safety Manufactured in full compliance with GB/T20840.1 and GB/T20840.2, guaranteeing adherence to recognized national standards for accuracy, insulation, and safety performance.