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LZZBJ9-10A, C Current Transformer 10kV - Precision Metering Solutions from China Suppliers & Factory

The LZZBJ9-10A and LZZBJ9-10C are high-precision indoor current transformers tailored for 10kV medium-voltage applications. These transformers boast a robust insulation rating of 12/42/75kV, ensuring exceptional performance and safety. With a wide primary current range of 10 to 1500A, they can convert to both 5A and 1A secondary standards, making them versatile for various electrical systems. Manufactured in China, these compact, high-performance current transformers are designed to meet multiple accuracy combinations and provide reliable metering and protection in modern electrical setups. As a trusted factory and supplier, we ensure that our products fully comply with GB/T 20840.2-2014 standards

Product Details

Product Functions

The LZZBJ9-10A/C series serves as a critical sensing and isolation component in 10kV power distribution networks. Its primary function is to accurately step down high primary currents (up to 1500A) to standardized, safe secondary levels (1A or 5A) for monitoring and control. Depending on the selected model variant (A or C), it provides precise signals for energy metering and billing (0.2S class) and/or general measurement (0.5 class), while simultaneously delivering stable outputs for circuit protection (10P class) via integrated dual-winding or triple-winding designs.

Applicable Environment

This product line is engineered for indoor installations within controlled environments. It is ideally suited for integration into 10kV metal-clad switchgear, ring main units (RMUs), compact substations, and indoor distribution panels. Typical applications include industrial plant electrical rooms, commercial building power distribution centers, data center power infrastructure, and renewable energy grid-connection points where equipment is protected from direct weather exposure. It is a core component for safe and efficient power management in medium-voltage indoor switchgear.

Product Highlights

⚙️ High Flexibility & Versatility

Offers multiple standard accuracy combinations (0.5/10P, 0.2S/10P, 0.2S/0.5/10P) in the A and C variants to meet diverse application needs — from pure protection to combined metering, measurement, and protection within a single compact unit.

🔌 Broad Current Range

Covers an extensive primary current rating from 10A to 1500A with a choice of 1A or 5A secondary output, providing exceptional application adaptability for various load profiles and system designs.

📊 Optimized Performance & Compliance

Designed with matched rated capacities (10/15VA or 10/15/15VA) corresponding to each accuracy class, ensuring optimal performance. Manufactured in strict accordance with the international benchmark GB/T 20840.2-2014, guaranteeing reliability and safety.

🛡️ Robust Insulation Design

Features a solid insulation level of 12/42/75kV, ensuring long-term dielectric strength, operational safety, and reliability under standard and transient overvoltage conditions in 10kV systems.

Frequently Asked Questions

❓ What voltage level is the LZZBJ9-10A/C series designed for?

The LZZBJ9-10A/C series is specifically designed for use in 10kV medium-voltage power distribution networks, featuring a solid insulation level of 12/42/75kV to ensure safe and reliable operation.

❓ What is the difference between the A and C model variants?

The A and C variants differ in their winding configuration and accuracy class combinations. They offer different combinations of 0.5/10P, 0.2S/10P, or 0.2S/0.5/10P, with the C variant typically incorporating a triple-winding design to support metering, measurement, and protection simultaneously.

❓ What primary current range does this current transformer support?

The LZZBJ9-10A/C series supports a broad primary current range from 10A to 1500A, with selectable secondary outputs of either 1A or 5A to suit various system designs and load profiles.

❓ Is this product suitable for outdoor installations?

No. The LZZBJ9-10A/C series is engineered exclusively for indoor installations in controlled environments such as metal-clad switchgear, ring main units, compact substations, and indoor distribution panels. It is not rated for direct outdoor exposure.

❓ Which international standard does this product comply with?

The LZZBJ9-10A/C series is manufactured in strict accordance with GB/T 20840.2-2014, which is aligned with international IEC standards for instrument transformers, ensuring consistent quality, reliability, and safety compliance.

❓ Can this current transformer be used in renewable energy applications?

Yes. The LZZBJ9-10A/C series is well-suited for renewable energy grid-connection points, including solar and wind power facilities, where medium-voltage indoor switchgear is used and accurate metering and protection are required.