Chint BH0.66 series current transformers are highprecision measuring devices specially designed for indoor AC circuits. They are suitable for power systems with a rated voltage of 0.66kV and below and a frequency of 50Hz, and are mainly used in scenarios such as current monitoring, electric energy metering, and relay protection. The following is a summary of its core information:
- Technical Parameters and Performance Characteristics
- Electrical SpecificationsThe Role of Current Transformers
Rated Voltage: 0.66kV (maximum voltage of the equipment is 0.72kV), in line with GB/T 20840.1/2 standards.
Accuracy Class: 0.2, 0.2S, 0.5, 0.5S, and 1 classes are available to meet different precision requirements (for example, class 0.2 is suitable for precision metering, and class 1 is suitable for general measurement).
Rated Primary Current: Covers 55000A, supports single busbar or cable throughcore installation, and the window width ranges from 30mm to 200mm.
Insulation Level: Power frequency withstand voltage of 3kV, ensuring safe and reliable operation.
Rated Load: Depending on the model, the range is 2.530VA, which is compatible with various secondary equipment.
- Structural Design
Plastic Enclosure Closed Type: Excellent protection performance, supports two installation methods: busbar fixing or base plate fixing, and can be installed horizontally or vertically.
ThroughCore Structure: Installation can be done without disconnecting the circuit, supports multiturn or singleturn threading, and flexibly adapts to different current scenarios.
Independent Patent Terminal: Firm wiring, strong antivibration ability, reducing the risk of poor contact.
- Environmental Adaptability
Operating temperature: 5℃~40℃, humidity ≤90% (monthly average), altitude ≤1000 meters, suitable for most industrial environments.
Certified by CE, Russian PCT, etc., some models comply with IEC standards, which can meet the needs of the international market.
- Application Scenarios and Installation Guidelines
- Typical Applications
Power Systems: Current measurement and electric energy metering in distribution cabinets and substations.
Industrial Automation: Realtime current monitoring of production line equipment, supporting PLC or DCS system access.
New Energy Field: Current data collection of photovoltaic inverters and energy storage systems.
- Installation Points
Wiring Specifications: The secondary circuit must be reliably grounded to avoid highvoltage hazards caused by open circuits.
Threading Requirements: The wire must pass through the window centrally, and the number of turns must strictly match the rated current ratio when multiturn threading is used.
Environmental Conditions: Avoid strong electromagnetic interference, and stay away from hightemperature, humid or corrosive environments.
III. Purchase and Service Support
- Model Selection
Select the corresponding model according to the current range, precision requirements and installation space. For example:
BH0.66 30Ⅱ: 30mm window, suitable for small currents (such as 30/5A).
BH0.66 80Ⅱ: 80mm window, suitable for large currents (such as 750/5A).
When placing an order, parameters such as current ratio, accuracy class, and window width must be specified. For example: BH(SDH)0.66 40Ⅱ 200/5A 5VA class 0.5.
- Purchase Channels
International Market: Purchase through Chint’s global service providers via Whatsapp: 008613811255435.
American Users: Can contact via Whatsapp: 008613811255435 for customized needs.
- AfterSales Guarantee
Provide technical support and product quality assurance, and onsite guidance can be arranged for engineering supporting projects.
Regular verification recommendation: According to the GB/T 20840 standard, it is recommended to conduct an error test every 2 years.
- Precautions and Safety Tips
- Compliance Requirements
The U.S. market needs to confirm compliance with UL or NEC standards (some models have passed UL certification, please consult the manufacturer for details).
The load of the secondary circuit must not exceed the rated value, otherwise the accuracy will be affected.
- Operation Taboos
It is strictly forbidden to open the secondary side, otherwise high voltage may be generated, endangering equipment and personal safety.
When replacing the transformer, the primary circuit must be disconnected first to avoid live work.
- Selection Suggestions
For metering purposes, 0.2S/0.5S classes are preferred, and for protection purposes, 5P class can be selected.
For large current scenarios, it is recommended to use multiturn threading or split design to reduce costs.
- User Feedback and Industry Evaluation
High Precision Performance: The error of class 0.5 models is ≤0.5%, meeting the needs of most industrial scenarios.
Reliable Stability: It can maintain stable performance in a wide temperature environment of 30℃~70℃.
Convenient Installation: The plastic enclosure design and modular terminals have been well received by electricians, especially suitable for dense distribution cabinets.
