Import Current Transformer Iron Core — Buy in wholesale FOB from Supplier in China

The current transformer iron core supplied by Anhui Lizhi Magnetic Material Co., Ltd. is manufactured using nano-crystalline alloy strips, selected for their balance of high permeability and moderate saturation flux density. Core dimensions range from 55x97mm to 135x135mm for rectangular types and 85x115mm to 1105x1165mm for ring cores, with typical thicknesses between 15mm and 45mm. The material achieves an initial permeability of 80,000 to 120,000 and a saturation flux density of 1.25T, making it suitable for precision measurement applications such as class 0.2S and 0.5S watt-hour meters. Excitation current values vary by design, from 20mA to 500mA under 50Hz conditions, with corresponding output voltages between 0.45mV and 120mV.

Nano-crystalline alloy is preferred over silicon steel and Permalloy in high-accuracy transformers due to its superior permeability and lower core loss. While silicon steel offers higher saturation flux density (2.03T), its permeability is an order of magnitude lower, leading to greater measurement error. Permalloy matches nano-crystalline in permeability but is heavier and more expensive. The nano-crystalline core’s density of 7.25g/cm³ and lamination factor of 0.7 allow for a 25% reduction in weight and a 30% reduction in manufacturing cost compared to Permalloy under equivalent performance. Operating temperature stability ranges from -55°C to 130°C, with a Curie temperature of 570°C, ensuring reliability in industrial environments.

These cores are primarily used in power system metering transformers, precision instrument transformers, and energy monitoring equipment where low ratio error and phase angle error are critical. Buyers include manufacturers of smart meters, industrial current sensors, and calibration laboratories. Packaging is in wooden cases with outer cartons, and cores are available in standard sizes or custom geometries upon request. Turn ratios are typically 1:1, though other ratios can be produced. Lead time and minimum order quantities are not specified and must be confirmed directly with the supplier.

Anhui Lizhi Magnetic Material Co., Ltd. is based in Hefei, Anhui Province, China, and specializes in the production of soft magnetic components for precision current transformers. The company’s listing shows a harbor trust tier, indicating basic verification of business registration and physical address, but no response rate or average response time is provided, suggesting limited buyer engagement on the platform. There is no public information on company history, workforce size, revenue, or export volume. The listing confirms capability in nano-crystalline core manufacturing and offers custom geometries, but does not claim ISO certification, ISO 9001, or any other quality system.

The supplier does not list client names, production capacity, or third-party test reports. It provides technical data on core performance parameters but does not include material certificates or traceability documentation. Buyers should request material composition reports and excitation curve data for each batch. The company’s focus appears limited to core fabrication without downstream transformer assembly. No information is provided regarding export experience, packaging compliance, or logistics partners.