In 12kV indoor power distribution projects, many system integrators and power engineering companies often encounter the challenges of limited installation space within the cabinets, insufficient space for retrofitting existing switchgear, and the need for equipment to withstand high-frequency opening and closing as well as repeated short-circuit fault interruptions. Juchen's indoor high-voltage side-mounted vacuum circuit breaker is a medium-voltage switchgear developed specifically to address these engineering pain points. This equipment serves three-phase AC 50Hz, 12kV rated voltage power systems, undertaking the control and protection responsibilities for the power grid side and industrial and mining enterprise power loads within the entire power distribution circuit. It can operate continuously under complex conditions of frequent operation at rated current and repeated short-circuit current interruptions.
Our product has undergone multiple rounds of endurance testing within the factory. It can be directly installed as a fixed unit inside a fixed switchgear, or it can be connected to a dedicated propulsion mechanism to assemble into a pull-out trolley unit for direct operation in armored switchgear systems. This flexible assembly capability allows the same hardware to cover the needs of both new projects and upgrades of existing power distribution systems, reducing the workload of comparing multiple models in the early stages of a project and facilitating unified management of spare parts later on.
The integrated body and operating mechanism reduce intermediate transmission connection points, lowering the probability of failures caused by mechanism jamming and transmission backlash. In fixed mode, it can be directly bolted on without additional modifications to the mechanism itself. When a project requires a pull-out trolley for maintenance and isolation, only the corresponding dedicated propulsion mechanism needs to be matched; there is no need to disassemble or modify the internal structure of the circuit breaker body. This preserves the factory-installed, commissioning-ready state to the greatest extent possible, avoiding human assembly errors introduced by on-site disassembly and commissioning. This provides significant practical benefits for overseas projects or upgrade projects with limited on-site installation technical capabilities.
As a medium-voltage protection switchgear, this product has completed a full set of type tests. Its design conforms to relevant domestic standards for high-voltage AC circuit breakers. The company holds full certifications for ISO9001 Quality Management System, ISO14001 Environmental Management System, and OHSMS18001 Occupational Health and Safety Management System. All test certificates, type test reports, 3D drawings, and 2D installation drawings can be provided to the purchaser, facilitating project approval, cabinet simulation verification, and on-site installation guidance for design institutes and complete equipment manufacturers.
Based on extensive engineering experience accumulated from numerous power distribution projects, the VZN63A-12C can operate at a maximum altitude of 2000 meters under normal conditions. The equipment is suitable for ambient temperatures ranging from -15℃ to +40℃. The seismic intensity at the operating site must not exceed magnitude 8. Direct deployment of the equipment in locations with fire or explosion risks, persistent chemical corrosion, or frequent and severe mechanical vibrations is not recommended. If the actual project conditions exceed these limits, such as higher altitudes, continuous condensation, or corrosive gases, please contact our technical engineers for customized adjustments to the insulation and component selection to ensure long-term operational stability.
This circuit breaker is widely used in practical projects, particularly in internal power distribution rooms of industrial and mining enterprises, factory power distribution systems, and 10kV distribution bays of small and medium-sized substations. It can also be integrated into indoor step-up distribution rooms for new energy projects. It is especially suitable for distribution circuits where equipment requires frequent switching operations and where short-circuit faults occur relatively frequently. Its side-mounted structure better adapts to non-standard or outdated cabinets with limited cabinet depth, avoiding forced modifications to the overall cabinet design due to equipment shape limitations, and helping project owners control the cost and timeline of cabinet upgrades.
We connect with various types of clients, including complete equipment manufacturers, power engineering general contractors, and overseas power distribution contractors, to understand their actual workflows. Whether it's bulk procurement of complete cabinet sets or piecemeal replacement procurement for project upgrades, we can provide preliminary selection and technical communication, confirming details such as cabinet dimensions, operating power supply, and the number of auxiliary contacts to avoid on-site rework due to selection errors. Product delivery includes factory inspection records and a technical documentation package containing installation guidelines and maintenance points. For key projects, we can also provide online technical briefings to assist installation personnel in completing the initial commissioning work.
A: For altitudes above 2000 meters, customized insulation derating is required. Please provide the project's altitude, temperature, and humidity parameters for technical evaluation.
A: No, they cannot be directly interchanged. The side-mounted structure installation interface differs from that of a standard front-mounted handcart. It is necessary to confirm the switchgear cabinet installation space and the matching propulsion mechanism. We can provide installation dimension drawings for preliminary verification.
A: Yes, after signing a technical cooperation agreement, a non-confidential version of the type test report and system certificate can be provided.
For detailed technical parameter tables, installation drawings, or project selection evaluations of indoor high-voltage side-mounted vacuum circuit breakers, please submit an inquiry form. Our power equipment engineers will provide targeted advice based on your project conditions within 24 hours.
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