Dongfa Intelligent has specialized in high-voltage electrical equipment since 2012, with a factory covering more than 2,000m², 4 technical and R&D personnel, and 2 production lines. The company operates under ISO 9001, ISO 14001, and ISO 45001 management systems and provides product development, manufacturing, testing, and technical support. As part of its indoor medium-voltage switchgear range, the 12kV Indoor Disconnect Switch with Earthing Switch is designed for applications requiring coordinated isolation and earthing functions.
The 12kV Indoor Disconnect Switch with Earthing Switch combines a disconnect switch and an earthing switch on one assembly. The disconnect switch is used to isolate the circuit, while the earthing switch provides a grounding path for the isolated circuit during maintenance.
The disconnect and earthing functions require an interlocking relationship to control the switching sequence. The specific mechanical or electrical interlocking arrangement should be coordinated with the complete switchgear design before production.
Combining isolation and earthing functions on one assembly can simplify the installation arrangement inside indoor switchgear. It is suitable for cabinets where the switching components, operating mechanism, and interlocking system need to be arranged within a defined installation space.
| Model | L | L1 | L2 | A | B | C | D | E | Mounting Thread |
| GN30-12(D)/2000 | 250/277 | 60/81 | 810/869 | 900/951 | 0 | 15 | 62 | M16 | 500000705 |
2500 5 0 0 0 0 7 0 5 M16 GN30-12(D)/ 250/27 760/81 810/86 900/95 10 1 5 62 M16 3150 5 0 0 0 0 7 0 5 L, L1, L2, and A have two available dimensions. The final dimension should be confirmed according to the switchgear layout and installation requirements.
The 12kV Indoor Disconnect Switch with Earthing Switch should be coordinated with the circuit breaker and other switchgear components. Before production, the required operation sequence, interlocking method, switch positions, and mechanical interface should be confirmed based on the complete cabinet design.
For replacement or retrofit applications, provide the original switch model, rated current, short-time withstand current, installation drawings or dimensions, earthing interlocking requirements, switchgear model, and required quantity. These details can be used to confirm dimensional and functional compatibility.
The 12kV Indoor Disconnect Switch with Earthing Switch can be configured for incoming and bus-tie sections where circuit isolation and earthing functions are required within the same switchgear arrangement.
It can be used in feeder switchgear requiring a coordinated isolation and earthing arrangement for circuit maintenance and switching operations.
The integrated configuration can be applied to transformer incoming sections where the disconnect and earthing functions need to be arranged together.
The switch is suitable for indoor medium-voltage distribution equipment used in industrial power distribution systems, subject to the required electrical ratings and cabinet dimensions.
The GN30-12(D) series can also be considered for replacement projects. Existing installation dimensions, electrical parameters, operating mechanism, and interlocking requirements should be checked before selection.
The main-circuit resistance varies by rated current configuration. The 2000A model has a resistance of 25μΩ, the 2500A model has 20μΩ, and the 3150A model has 12μΩ.
| Rated Working Current | Main-Circuit Resistance |
| 2000A | 25μΩ |
| 2500A | 20μΩ |
| 3150A | 12μΩ |
Selection should be based on the required rated current, short-time withstand current, switchgear configuration, and operating requirements.
Zhejiang Dongfa Intelligent Electrical Technology Co., Ltd. has focused on high-voltage electrical equipment since 2012, covering product development, manufacturing, testing, and technical support.
The factory covers more than 2,000m² and has 17 employees, including 4 technical and R&D personnel. It operates 2 production lines and 1 set of testing equipment, with a monthly production capacity of approximately 600-700 units and an annual capacity of approximately 7,000-8,000 units.
The company operates under ISO 9001, ISO 14001, and ISO 45001 management systems. Products are manufactured according to applicable GB standards and IEC 62271 requirements. Relevant products are supported by type test reports from qualified high-voltage electrical testing institutions.
| Service Item | Details |
| Standard Lead Time | 7-15 working days |
| Custom Lead Time | 15-30 working days |
| MOQ | 1 unit |
| Technical Response | Within 1 working day |
| After-Sales Support | Within 24 hours |
The 12kV Indoor Disconnect Switch with Earthing Switch provides a grounding path for an isolated circuit during maintenance. Its operation needs to follow the specified switchgear interlocking sequence.
GN30-12(D) identifies the product series and configuration of the indoor disconnect and earthing switch. The specific model suffix corresponds to the rated current and short-time withstand requirements.
Yes. The GN30-12(D) series integrates the earthing switch with the disconnect switch on the same assembly.
Selection should be based on the required rated working current, short-time withstand current, peak withstand current, and the electrical and mechanical requirements of the switchgear.
The 3150A configuration has a specified main-circuit resistance of 12μΩ.
Yes. For replacement applications, the original switch model, installation dimensions, rated current, short-time withstand current, and interlocking requirements should be provided for compatibility checking.
Provide the switchgear layout, required installation dimensions, rated current, short-time withstand current, operating arrangement, earthing interlocking requirements, and quantity.
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No. 281, Wei 18th Road, Yueqing Economic Development Zone, Yueqing, Wenzhou, Zhejiang, China
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