Through Core Current Transformer

Anqiang Power develops the core type Through Core Current Transformer LMZC-10 based on field application requirements of modern power distribution systems. Designed for medium-voltage switchgear environments such as GIS, RMU, and compact substations, the product provides stable measurement performance under complex operating conditions. It adopts a fully insulated structure with flame-retardant ABS housing and a sealed transparent terminal cover to improve safety and visibility during wiring and maintenance.

In practical metering and protection circuits, it is widely used for real-time current sampling and relay protection in power systems. Its split-core or ring-type structure allows direct installation on primary cables or busbars without dismantling the main conductor, improving efficiency during retrofit or maintenance projects.

Structural Design & Working Principle

It is built with a toroidal silicon steel core and epoxy resin casting insulation. The primary conductor acts as a single-turn winding, which significantly improves magnetic coupling efficiency and reduces energy loss during operation.

The secondary winding is made of high-conductivity copper wire to ensure stable current output and measurement accuracy. The fully sealed epoxy resin structure enhances moisture resistance, dust protection, and long-term mechanical stability.

In electrical engineering applications, the Through Core Current Transformer is preferred for its compact structure and reliable performance in continuous operation environments.

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Product dimensions diagram

Technical Parameters

Application scope and installation notes

This series is widely applied in low-voltage distribution cabinets, metering panels, and industrial automation systems. The Through Core Current Transformer is especially suitable for retrofit projects where existing busbars or cables cannot be disconnected during installation. It supports continuous operation in indoor environments with stable humidity and temperature control.

Application Scope

Widely applied in electrical power systems requiring accurate current monitoring and protection coordination. It is suitable for both industrial and utility-scale installations.

• Low and medium voltage switchgear systems
• Power distribution cabinets and metering panels
• Substation protection and monitoring systems
• Industrial automation power control systems
• Renewable energy power generation systems

Installation Requirements

Proper installation is essential to ensure measurement accuracy and safe operation. The primary conductor must pass through the center of the core to maintain balanced magnetic flux distribution.

• Keep the conductor centered inside the core window
• Do not leave the secondary circuit open during operation
• Ensure reliable grounding of the secondary terminal
• Use insulated mounting hardware for mechanical stability

Performance Advantages

Compared with conventional current transformers, the Through Core Current Transformer provides improved operational efficiency and long-term stability in electrical measurement systems.

• High measurement accuracy with stable linear response
• Low core loss and improved electromagnetic performance
• Epoxy resin insulation for enhanced environmental resistance
• Compact design suitable for limited installation space
• Long service life with minimal maintenance requirements

FAQ

Q1: What is the main function of this product?
A: It is used for current measurement and protection in electrical systems, especially in distribution and metering applications.

Q2: Can it be installed without shutting down the system?
A: Yes, its split-core design allows installation without disconnecting the primary conductor.

Q3: What systems is it compatible with?
A: It is suitable for low and medium voltage switchgear, including RMU and control panels.

Q4: What is the insulation level?
A: The insulation level is designed for industrial distribution environments and ensures safe operation under rated voltage conditions.

Q5: Can it be used outdoors?
A: It is mainly designed for indoor use; outdoor installation requires additional protective enclosure.

Q6: How often does it require maintenance?
A: Under normal operating conditions, periodic inspection is sufficient, with no frequent maintenance required.

Final note: This Through Core Current Transformer is designed for long-term stable operation in modern power distribution systems, ensuring reliable measurement and protection performance.