This Medium Voltage Vcb Panel finds application in power stations, substations, industrial plants, mining sites, commercial complexes, and comparable indoor MV distribution undertakings. Production adheres to relevant IEC and GB specifications, while Usune sustains ISO 9001, ISO 14001, and ISO 45001 certified management frameworks; CE compliance is available to satisfy overseas market prerequisites.
A hallmark of this switchgear lies in its extractable vacuum breaker setup. Rather than securing the interrupting unit statically within the housing, it is fitted to a rolling carriage capable of shifting among connected, test, and disconnected states in line with prescribed protocols. Such an arrangement yields real-world benefits during examinations, part substitutions, and fault tracing. Breaker carriages, PT carriages, and disconnector carriages can be specified to match the circuit layout, and the draw-out format grants service crews targeted access without stripping down the full enclosure. Where substations and process-industry grids demand expedited scheduled servicing and component swaps, this mobile-breaker concept streamlines workflows and shrinks downtime.
For medium-voltage assemblies, operational safety ranks among the foremost procurement priorities—wrong switching steps can trigger grave electrical peril. The KYN28 lineup integrates a mechanical five-proof interlock engineered to thwart improper operating routines. This hardware barrier averts:
Breaker handling errors – stops unintended trip or close actions.
Loaded racking – inhibits trolley movement while the circuit carries current.
Earthing under voltage – blocks earthing switch closure on a live network.
Energizing with earth applied – prevents circuit energization when earthed.
Unauthorized compartment entry – denies personnel access to energized bays.
By enforcing the mandated sequence physically, this interlocking scheme furnishes an extra layer of protection during both switching and upkeep tasks.
The Medium Voltage Vcb Panel employs a metal-divided interior that isolates principal current-carrying sections. The interrupting device bay, bus duct, cable termination bay, instrumentation and low-voltage bay, plus the pressure relief channel are each positioned separately. This zoning approach restricts the spread of an internal defect and keeps distinct assemblies apart during servicing, while rendering the internal architecture more comprehensible to operators. Overhead relief flaps chart a managed escape route for arc-fault pressures, damping the potential consequences for staff and neighboring apparatus.
Configured for frontal operation and care, the cabinet proves especially useful in electrical rooms where rear clearance is scarce. All standard switching and preservation steps follow the sanctioned routine from the front face alone. This forward-access model also simplifies room design and trims the rear-aisle space needed for periodic attention. For moisture-prone locations, an internal anti-condensation heater may be fitted to curb humidity-driven deterioration inside the housing.
Diverse MV distribution schemes call for distinct cabinet roles. The equipment may be appointed as an incomer receiving utility supply, an outgoer feeding motors or feeders, a PT and sensing unit, a metering section, a bus coupler, or an isolating bay. Such adaptability empowers EPC firms, electrical integrators, and plant operators to tailor switchgear arrays to the project single-line diagram rather than forcing a uniform cabinet type across every opening.
Power Plants – Auxiliary and distribution circuits within generating facilities depend on trustworthy MV gear for power intake, routing, and circuit safeguarding. The removable VCB layout delivers a workable answer for protection and switching, letting maintenance squads withdraw or exchange the breaker carriage as needed.
Substations – Within substations, the Medium Voltage Vcb Panel can be arranged for incoming lines, outgoing feeders, bus sectioning, voltage monitoring, and allied distribution purposes. The partitioned shell and five-proof interlock architecture underpin secure switching and servicing practices.
Industrial Facilities – Manufacturing plants typically run numerous motors, transformers, production lines, and support electrical networks. The Medium Voltage Vcb Panel accommodates varied feeder and motor protection profiles, centralizing MV switching and power distribution across the site.
Mining Operations – Extractive operations need resilient power distribution for motors, pumps, ventilation, processing plant, and ancillary demands. The metal-clad build and extractable breaker format supply a sound indoor MV distribution arrangement suited to harsh mining conditions.
Commercial & High-Rise Buildings – Sizeable office blocks and tall structures often house MV intake and distribution units in tight dedicated switchrooms. Frontal operation and servicing ease spatial planning where installation room is constrained.
The Medium Voltage Vcb Panel is available for different medium-voltage distribution requirements. Main technical parameters include:
| Item | Specification |
| Rated Voltage | 3.6kV, 7.2kV, 12kV |
| Rated Frequency | 50Hz / 60Hz |
| Rated Current | 630A, 1250A, 1600A, 2000A, 2500A, 3150A |
| Rated Short-Circuit Breaking Current | 25kA, 31.5kA, 40kA, 50kA |
| Rated Short-Time Withstand Current | 25kA/3s, 31.5kA/3s, 40kA/3s, 50kA/3s |
| Protection Degree | IP4X external enclosure, IP2X internal compartments |
| Ambient Temperature | -15°C to +40°C |
| Altitude | ≤1000m, derated for higher altitudes |
| Installation | Indoor |
The actual rated voltage, current, short-circuit capacity, cabinet arrangement, and other technical parameters should be confirmed according to the project single-line diagram and customer specification.
The equipment is designed for indoor installation with an ambient temperature range of -15°C to +40°C. The daily average relative humidity should not exceed 95%, while the monthly average should not exceed 90%.
The installation environment should be free from explosive or corrosive gases, conductive dust, and severe vibration. For installations outside the standard service conditions, technical requirements should be confirmed with Usune before production so that the appropriate configuration can be evaluated.
Usune has more than 14 years of experience in the electrical equipment field and maintains an experienced R&D team capable of developing equipment configurations according to project-specific requirements.
Quality control covers components, assembly, electrical performance, and finished products. Routine tests are conducted before equipment leaves the factory to verify product performance and ensure that the delivered switchgear meets the agreed technical requirements.
Different projects can require different current ratings, cabinet combinations, protection arrangements, and control functions. Usune provides engineering communication and configuration support based on customer single-line diagrams and technical specifications.
For standard configurations, Usune can provide a production period of approximately 15–20 days after confirmation and payment, with the actual lead time depending on configuration and order quantity.
Usune maintains product test reports and relevant technical documentation to support customer inspection, project approval, and supplier qualification procedures.
The equipment has been referenced for the Cas-space Rocket Launch Project, where medium-voltage electrical distribution equipment was required for specialized aerospace infrastructure.
Rocket launch facilities contain critical electrical loads and supporting systems that require dependable power distribution and controlled switching procedures. In this type of project, the switchgear configuration needs to consider not only electrical capacity but also operational safety, fault isolation, maintenance access, and equipment integration within the overall power distribution system.
The withdrawable vacuum circuit breaker structure and five-proof mechanical interlocking system provide a suitable configuration for controlled switching and maintenance operations. The compartmentalized cabinet structure further supports separation between the breaker, busbar, cable, and control sections.
The project reference demonstrates the applicability of Usune's medium-voltage switchgear technology to specialized infrastructure where electrical distribution reliability and operational safety are important engineering considerations.
The product is manufactured with reference to applicable IEC and GB requirements for medium-voltage switchgear and electrical equipment. Usune operates according to an ISO 9001 Quality Management System, ISO 14001 Environmental Management System, and ISO 45001 Occupational Health and Safety Management System.
The product is also available with CE certification for applicable international markets. Test reports and technical documentation can be provided according to project and customer requirements.
The standard configuration covers 3.6kV, 7.2kV, and 12kV applications. For a specific project, the rated voltage and insulation parameters should be confirmed according to the electrical system requirements.
The withdrawable trolley allows the vacuum circuit breaker to be moved between operating and isolated positions. This makes inspection, testing, replacement, and maintenance more convenient than a permanently fixed breaker arrangement.
The five-proof system is a mechanical safety interlock designed to prevent incorrect operating sequences. It helps prevent improper breaker operation, trolley movement under load, incorrect earthing switch operation, energizing an earthed circuit, and accidental access to energized compartments.
Yes. The switchgear can be arranged as incoming, outgoing, PT, metering, bus sectionalizer, or isolation cabinets according to the project's electrical configuration.
Yes. Usune supports OEM requirements such as customer logos, company names, and project-specific configurations, subject to technical and production confirmation.
For standard configurations, the typical production period is around 15–20 days after payment and technical confirmation. The actual lead time depends on the product configuration, quantity, and project requirements.
Usune conducts quality inspection from components through final assembly and performs routine tests before shipment. Relevant test reports can be provided according to customer and project requirements.
The standard warranty period is 12 months from the shipping date, subject to the agreed sales and technical conditions.
If you are sourcing Medium Voltage Vcb Panel for a power plant, substation, industrial facility, mining project, commercial building, or specialized infrastructure project, Usune can provide configuration support based on your electrical requirements.
Send your single-line diagram, rated voltage, rated current, short-circuit level, cabinet quantity, and required functions to Usune for technical evaluation and quotation.
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