BH0.66-I Newest Current Transformer Designed for Accurate Electrical Current Detection

The newest current transformer BH0.66-I from Jiangyin Yucheng Electric Co., Ltd. is designed for current measurement applications involving cables and copper bars in electrical main circuits. With a practical structure, stable performance, and flexible configuration options, this series provides reliable current signal collection for power monitoring, energy management, and electrical protection systems.

The BH0.66-I series is developed according to the requirements of GB/T20840.1.2 and can meet different accuracy requirements, including Class 0.2, Class 0.5, and Class 1. The product series includes seven specifications, with a primary current range of 5A to 6000A and rated secondary output options of 1A to 5A. A 0–1V output option is also available according to product requirements.

Electrical Performance and Technical Specifications

The BH0.66-I current transformer provides electrical and structural characteristics suitable for various current monitoring applications.

Main specifications include:

• Primary current: 5–6000Arms 
• Rated secondary output: 1–5Arms 
• Output option: 0–1V 
• Accuracy: Class 0.2, Class 0.5, Class 1 and other applicable precision requirements 
• Ratio difference: ≤±0.1% 
• Phase difference: ≤±10 points 
• Working frequency: 50–400Hz 
• Highest equipment voltage: 0.66/0.72KVrms 
• Dielectric strength: 2.5KV/1mA/1min 
• Insulation resistance: DC500V/1000MΩ/min 
• Working temperature: -12℃ to +45℃ 
• Ambient humidity: ≤85% 

The product adopts an ABS shell with flame retardant grade 94-V0, a PBT skeleton, and an environment-friendly epoxy resin casting internal structure. The iron core is available in nickel or nanocrystalline material, supporting stable current measurement performance.

Key Applications

The BH0.66-I current transformer is mainly used in electrical systems that require current measurement, monitoring, and protection. Its application areas include:

• Power monitoring 
• Energy consumption management 
• Intelligent power systems 
• Electromagnetic relay protection 
• Microcomputer protection 
• Motor protection 
• Rural power grid transformation 

The product is designed for cables and copper bars in main circuits, providing a suitable solution for current signal collection in different electrical equipment environments.

In power monitoring systems, the current transformer can provide measurement signals for connected monitoring devices. In energy management applications, it can be integrated into systems that require electrical data collection and analysis.

For protection applications, the selected current transformer specification can be matched with the requirements of relay protection systems, microcomputer protection equipment, and motor protection devices.

Structural Features

Solid-Core Structure

The BH0.66-I series adopts a solid-core structure designed for high-precision and stable current measurement in cable and copper-bar applications. The integrated core design provides reliable magnetic performance and consistent signal conversion for electrical monitoring and protection systems.

The fixed closed-core structure improves measurement stability and accuracy, making it suitable for applications where precise current detection is required. Users can select the appropriate specification according to the primary current requirements and main circuit conditions.

This solid-core design provides a reliable solution for power monitoring, energy consumption management, intelligent power systems, and electrical protection applications.

Multiple Specifications and Flexible Selection

The series includes seven specifications, with a primary current range within 6000A. Different models can be selected according to the current requirements of the electrical system.

The available specifications help users match the current transformer with different power monitoring and protection applications while maintaining stable measurement performance.

Material and Internal Design

The BH0.66-I uses specified materials including an ABS flame-retardant shell, PBT skeleton, nickel or nanocrystalline iron core, and environment-friendly epoxy resin casting structure.

These structural components provide the basic mechanical and electrical characteristics required for current transformer operation.

Screw Fixation Method

The product uses screw fixation as the specified construction method. This design provides a stable installation approach for securing the current transformer in the electrical system.

Installation & Connection

The BH0.66-I series should be installed according to the selected specification and the requirements of the connected electrical equipment.

Installation steps include:

• Select the suitable current transformer specification according to the application requirements. 
• Install the transformer using the Solid-Core structure. 
• Secure the product through the screw fixation method. 
• Connect the secondary output according to the requirements of the monitoring or protection equipment. 

Accuracy and Operating Conditions

The BH0.66-I series supports different accuracy requirements, including Class 0.2, Class 0.5, and Class 1. The specified ratio difference is ≤±0.1%, and the phase difference is ≤±10 points.

The working frequency range is 50–400Hz. The product is designed for a working temperature range of -12℃ to +45℃, with an ambient humidity requirement of ≤85%.

The highest equipment voltage is specified as 0.66/0.72KVrms. The dielectric strength and insulation resistance specifications provide important reference information for electrical system selection.

When selecting a current transformer, users should evaluate the electrical conditions, monitoring requirements, and connected equipment specifications to choose a suitable model.

Conclusion

The BH0.66-I newest current transformer is designed for cable and copper-bar electrical applications, providing current measurement support for power monitoring, energy management, and protection systems.

The series features an Solid-Core structure, seven available specifications, different accuracy options, and a primary current range of 5A to 6000A. With ABS flame-retardant housing, PBT skeleton, nickel or nanocrystalline iron core, and epoxy resin casting structure, the product offers a reliable configuration for various electrical applications.

For applications involving power monitoring, intelligent power systems, relay protection, motor protection, and electrical current detection, the BH0.66-I series provides a practical current transformer solution.

Contact us for detailed product specifications, installation information, or customization support.