Dongfa Intelligent provides professional procurement and technical selection solutions for 12kV Indoor Embedded Pole Vacuum Circuit Breaker. The ZN63(VS1)-12 is built for indoor 12kV medium-voltage power distribution systems and uses a solid-enclosed pole structure that integrates vacuum interruptor, conductive and insulating components for a compact layout; its pole design limits exposed core parts to support stable insulation and mechanical performance, matching the compact integration needs of modern medium-voltage switchgear.
Integrated Embedded Pole Structure: Solid-enclosed pole assembly incorporates key internal components to minimise exposed parts. The compact form factor supports the integration requirements of modern indoor medium-voltage switchgear with limited cabinet space.
Comprehensive Electrical Performance: Covers a broad spectrum of distribution capacity and fault breaking requirements for medium-voltage systems to handle diverse operating and fault conditions.
Stable Insulation Performance: Integrated solid insulation delivers dependable dielectric performance to sustain continuous equipment operation over extended service periods.
High Operational Reliability: Designed with standard operating duty cycles and stable mechanical properties, suited for long-term continuous operation within power, industrial and mining environments.
The encapsulated pole is the core structural feature of this product.
Key components such as the vacuum interruptor are integrated within the encapsulated pole, forming a relatively complete insulation structure for the circuit breaker pole. Compared to traditional distributed structures, this design helps improve product integration and reduces the complexity of some external connections and insulation structures.
The encapsulated pole design of the ZN63(VS1)-12 is based on this practical application requirement.
The rated short-circuit breaking current of the 12kV Indoor Embedded Pole Vacuum Circuit Breaker includes: 20kA / 25kA / 31.5kA / 40kA, up to 40kA.
For medium-voltage systems such as power companies, industrial enterprises, power plants, and mines, short-circuit fault currents can have serious impacts on equipment. The short-circuit breaking capacity of the circuit breaker is an important basis for project selection.
Selection should be based on the actual short-circuit calculation results of the project, rather than simply matching the product based on the 12kV rated voltage.
This product series offers a wide range of rated currents: 630A / 1250A / 1600A / 2000A / 2500A / 3150A / 4000A.
The variety of rated current options covers different medium-voltage distribution capacity requirements, providing more flexible specifications for power engineering and switchgear projects.
The specific correspondence between rated current and short-circuit breaking capacity should be based on the final product configuration and technical confirmation documents.
42kV Power-Frequency Withstand and 75kV Lightning Impulse Withstand.
According to currently available technical data, the main insulation parameters of ZN63(VS1)-12 are:
Clearly defined insulation performance parameters help engineers verify that products meet project requirements during the design phase.
| Parameter Items | Technical Specifications |
| Product Type | Indoor Embedded Pole Vacuum Circuit Breaker |
| Model | ZN63(VS1)-12 |
| Rated Voltage | 12kV |
| Rated Frequency | 50Hz |
| Power-Frequency Withstand Voltage, 1 min | 42kV |
| Lightning Impulse Withstand Voltage | 75kV |
| Rated Current | 630 / 1250 / 1600 / 2000 / 2500 / 3150 / 4000A |
| Rated Short-Circuit Breaking Current | 20 / 25 / 31.5 / 40kA |
| Rated Short-Time Withstand Current, 4s | 20 / 25 / 31.5 / 40kA |
| Rated Short-Circuit Making Current | 50 / 63 / 80 / 100kA |
| Rated Peak Withstand Current | 50 / 63 / 80 / 100kA |
| Rated Operating Sequence (40kA) | O-0.3s-CO-180s-CO; O-180s-CO-180s-CO |
| Short-Circuit Breaking Operations | 30 / 20 at 40kA |
| Rated Cable-Charging Breaking Current | 25A |
| Mechanical Life | 1,000 operations |
| Structure | Embedded Pole / Solid Insulated Pole |
| Application | Indoor Medium-Voltage Distribution |
| Applicable Standard | GB/T 1984 |
The 12kV Indoor Embedded Pole Vacuum Circuit Breaker is primarily used in indoor 12kV medium-voltage power distribution systems.
Used for medium-voltage breaking and protection in power distribution systems, selecting the appropriate rated current and short-circuit breaking capacity based on line parameters.
Can be used in power plant medium-voltage power distribution equipment, providing breaking and fault protection for relevant power circuits.
Mining environments demand high equipment stability and space utilization. Solid-enclosed pole structures can be used as part of compact medium-voltage switchgear solutions.
Suitable for industrial plants, production facilities, and internal medium-voltage power distribution systems.
For switchgear manufacturers, the solid-enclosed pole structure is suitable for medium-voltage switchgear designs requiring high integration.
When purchasing a 12kV Indoor Embedded Pole Vacuum Circuit Breaker, confirm the following technical parameters:
For switchgear retrofit projects, provide existing cabinet drawings or the original circuit breaker model before requesting a quotation to confirm installation compatibility.
The actual installation photos are valuable to switchgear manufacturers and contractors, as they often need to determine whether the product's structure is compatible with existing cabinet solutions.
Established in 2012, Dongfa specializes in the R&D, manufacturing, and sales of high-voltage electrical equipment, covering 12kV, 24kV, and 40.5kV applications.
The company operates a production facility of more than 2,000 square meters with 2 professional production lines and 1 set of testing equipment, supported by 17 employees, including 4 R&D and technical personnel.
Dongfa is certified to ISO 9001, ISO 14001, and ISO 45001. Core products have undergone type testing by the National High-Voltage Electrical Apparatus Quality Supervision and Inspection Center and are manufactured according to relevant GB and IEC standards.
For the 12kV Indoor Embedded Pole Vacuum Circuit Breaker, Dongfa can confirm specifications according to rated voltage, rated current, short-circuit breaking capacity, switchgear dimensions, installation interfaces, and other project requirements.
Customized production is available based on customer drawings, technical specifications, and application requirements. Products are used in power systems, industrial and mining applications, rail transportation, new energy, and other fields.
An embedded pole vacuum circuit breaker is a vacuum circuit breaker structure that integrates the vacuum interruptor and related core conductive and insulating components into a solid-sealed pole. This improves product integration and is suitable for compact medium-voltage switchgear.
The rated voltage is 12kV, and the rated frequency is 50Hz.
Product technical data covers multiple rated current levels from 630A to 4000A, including 630A, 1250A, 1600A, 2000A, 2500A, 3150A, and 4000A.
The rated short-circuit breaking current reaches a maximum of 40kA.
According to the currently provided manufacturer data, the rated mechanical life is 1000 operations.
The rated 1-minute power frequency withstand voltage is 42kV, and the lightning impulse withstand voltage is 75kV.
Primarily used in indoor 12kV medium-voltage power distribution systems, applicable to power distribution, power plants, mines, industrial enterprises, and related medium-voltage switchgear systems.
It is recommended to provide the switchgear model, installation drawings, original circuit breaker model, and main electrical parameters before procurement. Technical personnel can then further confirm the dimensions, interfaces, and electrical performance compatibility.
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