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Product Specification

Comen CMLI2X4I001B Current Transformer The Ultimate Used Patient Monitor for Power System Management

In the measurement, monitoring, and protection of power systems, the Current Transformer (CT) plays a vital role, safely and accurately converting high primary current into low secondary current usable by instruments and relays. The Comen CMLI2X4I001B is a well-designed, reliable epoxy resin cast busbar-type current transformer from Comen Electric, specifically engineered to meet the stringent demands of modern power systems for precision, safety, and stability.

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Core Design Philosophy and Structural Features

Busbar-Type Mounting Design: The CMLI2X4I001B features a busbar-type structure with a standard-sized rectangular center hole. Installation involves simply passing the primary busbar (or cable) through this hole without disconnecting the primary circuit. This greatly simplifies installation, making it particularly suitable for compact switchgear (like KYN28, KYN61 withdrawable cabinets), ring main units (RMUs), compact substations, and retrofit projects requiring easy installation.

Epoxy Resin Vacuum Casting: The transformer body is cast from high-quality epoxy resin under vacuum conditions. This process ensures the product possesses:

Excellent Insulation Performance: Effectively resists harsh environments like moisture, pollution, and chemical corrosion, guaranteeing long-term electrical safety.

Superior Mechanical Strength: Robust structure with strong resistance to vibration and impact, minimizing cracking or deformation.

Reliable Sealing: Prevents internal components from moisture ingress and oxidation, extending service life.

Excellent Flame Retardancy (UL94 V-0): Significantly enhances fire safety levels.

Compact and Lightweight: Benefiting from rational structural design and advanced material processes, this transformer is small in size and light in weight, effectively saving valuable space within switchgear cabinets and facilitating dense arrangements.

Key Performance Parameters and Technical Advantages

High Precision Measurement (Class 0.5): The CMLI2X4I001B typically achieves high measurement accuracy of Class 0.5. This means that under rated burden and within the specified current range, both its ratio error and phase displacement are strictly controlled within the 0.5% error limit. It provides highly accurate current signals for energy metering and operational monitoring, ensuring billing fairness and reliable system status monitoring.

Wide Range of Rated Primary Current (Ipn): The "001B" in the model number typically represents a specific rated primary current value (consult the product manual for exact values like 100A, 150A, etc.). Comen offers a rich selection of specifications to cover diverse application needs.

Standard Rated Secondary Current (Isn): The secondary output provides standardized 5A or 1A current signals, facilitating easy connection to various standard secondary devices like analog/digital ammeters, energy meters, relay protection devices, and measurement/control units.

High Measurement Range: Capable of stable long-term operation at 120% or even higher multiples of the rated current, meeting system short-term overload requirements

Good Load Adaptability: Designed considering the actual burden (impedance) of the secondary circuit, ensuring it maintains its nominal accuracy class within the specified burden range (e.g., ≤5VA).

High Insulation Withstand Level: Complies with stringent national standards (GB) and International Electrotechnical Commission (IEC) standards. It withstands high-intensity power frequency withstand voltage and impulse withstand voltage tests between primary and secondary windings, primary to earth, and between secondary windings, safeguarding personnel and equipment.

Wide Operating Temperature Range: Operates reliably in ambient temperatures from -25°C to +70°C (or wider), ensuring stable performance under various climatic conditions.

Typical Application Scenarios

The Comen CMLI2X4I001B current transformer is widely used in:

Energy Metering: Provides accurate current sampling for grid connection metering, user-side metering, and internal energy accounting.

Operational Monitoring & Data Acquisition (SCADA): Supplies real-time current data to power monitoring systems for load analysis and status monitoring.

Relay Protection: Delivers reliable current input signals for protection devices (overcurrent, instantaneous, differential, etc.), acting as the "sensory nerve" safeguarding the secure and stable operation of the power grid.

Distribution Automation Systems: Used for current monitoring and control within distribution automation terminals (DTU/FTU).

Industrial, Mining & Building Power Distribution: Current measurement and protection in various distribution panels, motor control centers (MCCs), and capacitor compensation cabinets.

The Comen CMLI2X4I001B epoxy resin cast busbar-type current transformer, with its convenient busbar mounting, robust and reliable epoxy resin insulation structure, Class 0.5 high-precision measurement performance, and outstanding environmental adaptability, stands as an ideal choice for current sensing in medium and low-voltage distribution systems. It not only simplifies engineering installation and reduces maintenance costs but, more importantly, provides a solid foundation for the safe, stable, efficient, and precise operation of the power system. Whether for new projects or equipment upgrades, the CMLI2X4I001B can reliably perform the critical task of current conversion and measurement with its excellent overall performance, proving itself as a trustworthy "Guardian of Electrical Systems". When selecting, be sure to refer to the official Comen product manual for precise specification based on actual application parameters such as primary current, installation space, accuracy requirements, and burden size.