The KYN61-40.5 33kV Indoor VCB Switchgear Panel employs a metal-clad structure to separate primary and secondary circuits, with the main path encompassing the VCB, bus links, cable termination zone, and grounding elements, while secondary devices handle protection, metering, control, signaling, and communication as dictated by project needs. This approach permits the lineup to reflect the actual power network rather than a generic cabinet template. Functional compartments are clearly delineated—breaker chamber, busbar bay, cable vault, and instrumentation section—allowing engineers to map installation, wiring, commissioning, and upkeep with precision. Circuit arrangements span incoming feeds (receiving upstream power to the bus), outgoing feeders (supplying transformers, motors, or process loads), PT-based voltage surveillance, bus sectionalizing for operational flexibility, and dedicated metering for energy monitoring.
The KYN61-40.5 33kV Indoor VCB Switchgear Panel employs a metal-clad structure to separate primary and secondary circuits, with the main path encompassing the VCB, bus links, cable termination zone, and grounding elements, while secondary devices handle protection, metering, control, signaling, and communication as dictated by project needs. This approach permits the lineup to reflect the actual power network rather than a generic cabinet template. Functional compartments are clearly delineated—breaker chamber, busbar bay, cable vault, and instrumentation section—allowing engineers to map installation, wiring, commissioning, and upkeep with precision. Circuit arrangements span incoming feeds (receiving upstream power to the bus), outgoing feeders (supplying transformers, motors, or process loads), PT-based voltage surveillance, bus sectionalizing for operational flexibility, and dedicated metering for energy monitoring.
Safety is embedded through a mechanical interlock system enforcing correct operating sequences, incorporating a five-proof protocol that bars erroneous breaker operation, on-load movement of the withdrawable element, earthing with live conductors, energizing with the earth switch closed, and inadvertent entry into live zones. Additionally, metal barriers between sections organize the internal layout, and a top-mounted pressure relief channel safely vents internal fault energy. The vacuum breaker delivers primary switching and arc-quenching, while the associated relay and control suite can be customized to the customer's protection philosophy, ensuring all components—from upstream sources to cables and transformers—operate in concert under calculated fault scenarios.
This versatile platform, built around the KYN61-40.5 33kV Indoor VCB Switchgear Panel, finds application across diverse sectors: indoor substations utilizing it for power intake, transformer tie-ins, feeder dispatch, and measurement; power plants leveraging it for medium-voltage auxiliary networks and generator-linked systems; large industrial sites powering motors, compressors, and production lines; mining operations managing heavy distributed loads like ventilation and pumping; and specialized infrastructure requiring synchronized distribution across multiple buildings and equipment clusters. By aligning the physical array with the approved single-line diagram and site-specific demands, Usune delivers a robust, safety-compliant solution for complex higher-voltage distribution challenges.
Serving as a project reference for Usune medium-voltage switchgear applications is the Cas-space Rocket Launch Project.
Specialized infrastructure is central to a rocket launch facility, where numerous electrical loads are dispersed across separate functional areas. The power distribution system must consequently provide coordinated incoming circuits, feeder protection, electrical isolation, measurement, and control.
Within this project, the switchgear formed part of the site's medium-voltage electrical distribution arrangement. Integration with the broader infrastructure was a project requirement for the electrical equipment, which was not to be handled as an independent cabinet installation.
Usune's experience in supplying medium-voltage distribution equipment — including the KYN61-40.5 33kV Indoor VCB Switchgear Panel — for specialized engineering projects with specific electrical system requirements is reflected in this application.
| Item | Specification |
| Series | KYN61 |
| Rated Voltage | 3.6kV, 7.2kV, 12kV, 24kV, 36kV |
| 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 |
| Relative Humidity | Daily average ≤95%; monthly average ≤90% |
| Altitude | ≤1000m, with derating for higher altitude |
| Installation | Indoor |
| System | Three-phase AC |
The final electrical configuration should be confirmed according to the actual project voltage, current, fault level, insulation requirements, protection scheme, and installation conditions.
For 33kV-class switchgear, procurement should cover the complete electrical system, not cabinet count alone—confirm voltage rating, load current, short-circuit level, feeder quantity, transformer capacity, cable arrangement, protection, and metering needs. Cabinet functions (incoming, outgoing, PT, metering, bus sectionalizer, isolation) are combined per the single-line diagram, avoiding mismatches with transformers, cables, protection devices, and downstream loads. A typical lineup includes an incoming cabinet, outgoing cabinets for transformers or major loads, and PT/metering cabinets; bus sectionalizing can be added for dual sources or divided bus sections, suiting both single substations and larger multi-cabinet systems.
Before delivery, switchgear is inspected for assembly, primary connections, secondary wiring, mechanical operation, and electrical functions, including the withdrawable mechanism, breaker operation, interlocking, grounding, and cabinet construction. Usune provides inspection records and test documentation for verification before shipment. Beyond its initial rating, medium-voltage switchgear must support organized operation, planned maintenance, future circuit management, and stable network integration. The KYN61-40.5 33kV Indoor VCB Switchgear Panel's compartmentalized construction defines primary and secondary equipment layout, while its withdrawable breaker design allows the switching unit to be moved for servicing—simplifying long-term maintenance.
The provided specification includes 3.6kV, 7.2kV, 12kV, 24kV, and 36kV configurations. The actual rated voltage should be confirmed according to the customer's power system.
The supplied specification lists a 36kV rated configuration, which can be considered for 33kV-class systems subject to confirmation of the actual system requirements, insulation level, and applicable standards.
It is used for medium-voltage power receiving, distribution, switching, protection, measurement, and control in indoor three-phase AC power systems.
The provided configurations range from 630A to 3150A. The correct rating should be selected according to the maximum continuous load and project design.
Available ratings include 25kA, 31.5kA, 40kA, and 50kA, with the applicable value determined by the calculated fault level of the electrical system.
Yes. Usune can configure incoming, outgoing, PT, metering, bus sectionalizer, and isolation functions according to the customer's single-line diagram and technical requirements.
Usune operates under ISO 9001, ISO 14001, and ISO 45001 management systems. The products are designed according to applicable IEC and GB standards, with CE certification available for applicable configurations.
Yes. Usune can provide technical specifications, test reports, drawings, and other project documentation according to customer and engineering requirements.
The standard configuration is designed for indoor installation. Special conditions such as high altitude, high humidity, or unusual environmental conditions should be confirmed before ordering.
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