Products Description

Closing and Opening Coils are key control components of VTZ modular high-voltage vacuum circuit breakers, combined electrical appliances, and other related electrical equipment. They use electromagnetic drive to control the closing and opening operations of the circuit breaker, enabling rapid and reliable switching of the main circuit and supporting the safe and flexible operation of power systems.

The coils are designed with a focus on high reliability, fast response, stable operation, and long service life, making them suitable for frequent switching applications. They work together with the circuit breaker's operating mechanism and control system to ensure accurate and dependable operation under different working conditions. They are widely used in substations, medium-voltage distribution networks, industrial power systems, and other electrical equipment, providing reliable control and protection for power distribution and switching applications.

Product Technical parameter

1. The insulation of the coil to the shell can withstand the power frequency voltage ≥ 2500V;

2. The insulation between the coil turns can withstand 2.5 times the rated power frequency voltage (see the table below);

3. The outer diameter of the wrapping tape is less than Ф29;

4. Repeated short-time working system, power-on time is less than 100ms;

5. The stroke of the electromagnet is 18±0.5mm;

6. Working power supply: DC, voltage value is shown in the table below;

7. Other parameters are shown in the table below.

Internal resistance	60%~120% rated voltage	30% rated voltage	Operating power
45±5Ω	60V~120V(DC)	33V(DC)	110V
185±10Ω	132V~264V(DC)	66V(DC)	220V
6±0.3Ω	29V~58V(DC)	14V(DC)	48V
150±8Ω	132V~264V(DC)	66V(DC)	220V
160±8Ω	132V~264V(DC)	66V(DC)	220V

Note: Can be customized according to user requirements.

Scope of application

1. VTZ series indoor integrated vacuum circuit breaker mechanism module;

2. VTZ series indoor split vacuum circuit breaker operating mechanism;

3. VTZ series outdoor split vacuum circuit breaker operating mechanism;

4. VTZ series inflatable cabinet circuit breaker unit operating mechanism;

5. VTZ series combined electrical operating mechanism;

6. Other occasions where modular operating mechanisms are used.

Closing and Opening Coil supplier

High reliability

Fully sealed design is available as an option and has passed EMC anti-interference testing, providing strong resistance to power grid fluctuations and electromagnetic noise. This design enhances the stability and reliability of the circuit breaker under complex electrical environments, helping ensure consistent performance during long-term operation.

Strong compatibility

It is compatible with power switchgear equipped with mainstream modular operating mechanisms in China, providing flexible installation and reliable integration with different equipment configurations. This compatibility makes it easier to replace, upgrade, and maintain existing switchgear while reducing modification requirements.

Customized service

It supports non-standard customization such as voltage, installation size, protection level, etc.It supports non-standard customization of key specifications, including rated voltage, installation dimensions, protection level, and other requirements. Customized solutions can be developed according to different equipment configurations and application conditions, ensuring better compatibility and convenient installation.

Customized service

It supports non-standard customization of key specifications, including rated voltage, installation dimensions, protection level, and other requirements. Customized solutions can be provided according to different application environments and equipment configurations to ensure excellent compatibility and convenient installation.

Product Applications

Closing and Opening Coils are widely used in indoor and outdoor vacuum circuit breakers within the 7.2kV–40.5kV voltage range. They provide reliable electromagnetic control for fast and stable closing and opening operations, ensuring dependable performance in various power distribution applications.