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High-Precision LZZBJ9-10A Current Transformer 10kV - Trusted China Suppliers & Factory for Medium-Voltage Solutions

The LZZBJ9-10A and LZZBJ9-10C are high-quality indoor current transformers manufactured in China, ideal for 10kV medium-voltage applications. These precision current transformers boast a strong insulation level of 12/42/75kV, ensuring durability and reliability. With a versatile primary range of 10~1500A, they are designed to provide both 5A and 1A secondary standards, making them suitable for various applications. Our current transformers are available in multiple accuracy combinations, ensuring optimal performance for metering and protection in modern electrical systems. As a trusted factory and supplier, we guarantee that our products meet the rigorous standards of GB/T 20840.2-2014, delivering the performance and reliability that you expect from top-tier electrical components

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

Q 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, with a rated insulation level of 12/42/75kV to ensure safe and reliable operation under standard and transient overvoltage conditions.

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

The A and C variants differ in their accuracy class combinations and winding configurations. The A variant typically features a dual-winding design, while the C variant offers a triple-winding design — providing additional accuracy class options such as 0.2S/0.5/10P to simultaneously support metering, measurement, and protection functions within a single unit.

Q What primary current ratings are available for this series?

The LZZBJ9-10A/C series covers an extensive primary current range from 10A to 1500A. Secondary output options are available in either 1A or 5A, offering flexibility to match various load profiles and system design requirements.

Q What types of installations and environments is this product suitable for?

This product is designed for indoor installations only. It is well-suited for 10kV metal-clad switchgear, ring main units (RMUs), compact substations, and indoor distribution panels. Typical deployment environments include industrial plant electrical rooms, commercial building power centers, data center infrastructure, and renewable energy grid-connection facilities.

Q Which international standard does the LZZBJ9-10A/C series comply with?

The LZZBJ9-10A/C series is manufactured in strict accordance with GB/T 20840.2-2014, which is the Chinese national standard aligned with the international IEC 61869-2 benchmark for current transformers, ensuring product reliability, measurement accuracy, and operational safety.

Q What rated burden (VA) is supported for each accuracy class?

The rated burden capacity is matched to each accuracy class to ensure optimal performance. Dual-winding models (A variant) support 10/15VA configurations, while triple-winding models (C variant) support 10/15/15VA configurations, corresponding respectively to the metering, measurement, and protection windings.