Kyn28 Switchgear 12kv

The Usune Kyn28 Switchgear 12kV is an indoor high-voltage power distribution device with rated voltages covering 3.6kV, 7.2kV, and 12kV, suitable for 50/60Hz three-phase AC power systems. It is a core electrical equipment in modern power transmission and distribution, industrial power distribution, and commercial building power supply fields. The product adopts an armored, metal-enclosed structure, completely separating functional units such as circuit breakers, busbars, cables, and instrumentation control. This design eliminates the spread of arcing faults from the outset. It is also equipped with a withdrawable vacuum circuit breaker trolley, enabling rapid maintenance and replacement without shutting down the busbar, fully meeting the core requirements of power systems for safe, stable, and efficient operation and maintenance.

Low voltage switchgear

Medium voltage switchgear

Core Technical Parameters

Independent Compartment Structure

The Kyn28 Switchgear 12kV adopts a modular compartment design with all-metal isolation. The four functional areas are completely independent, effectively preventing fault propagation:

1. Circuit Breaker Compartment: Installs a vacuum circuit breaker trolley, equipped with precise guidance and interlocking mechanisms to ensure safe trolley movement.
2. Busbar Compartment: Enclosed layout of main and branch busbars with excellent insulation performance, avoiding the risk of phase-to-phase/phase-to-ground short circuits.
3. Cable Compartment: Ample space, suitable for multi-circuit cable connections, facilitating cable laying, wiring, and testing.
4. Instrument and Control Compartment: Integrates protection devices, metering instruments, and control circuit components for centralized monitoring and operation.
5. Pressure Relief Device: Equipped with a dedicated pressure relief flap on the top, it can quickly release arc pressure in case of internal faults, ensuring the safety of the cabinet and personnel.

Core Product Advantages

1. Removable Handcart Design

The circuit breaker, PT, and isolating handcart series are fully interchangeable. During maintenance, simply remove the faulty handcart and push in the spare handcart to quickly restore power without disconnecting the entire busbar, significantly reducing power outage maintenance time.

2. Comprehensive "Five-Prevention" Mechanical Interlocking:

- Prevents accidental opening and closing of circuit breakers;
- Prevents removing/pushing in the circuit breaker handcart under load;
- Prevents accidental closing of the grounding switch while energized;
- Prevents accidental energization when the grounding switch is closed;
- Prevents accidental entry into energized compartments.

3. Optimized Safety and Maintenance

The all-front operation and maintenance design eliminates the need for rear maintenance space, effectively saving floor space in the distribution room; the cabinet has a built-in condensation heater, adaptable to high humidity environments, preventing insulation faults caused by condensation.

4. High Insulation and Fault Resistance

The Kyn28 Switchgear 12kV utilizes high-quality insulation materials and scientifically spaced insulation, achieving a high insulation level. It effectively resists short circuits, overvoltages, and other electrical faults. Combined with its metal armor structure, it boasts strong arc control capabilities.

Main Application Types

1. Incoming Line Cabinet: Receives power from upstream sources, providing power reception and overall protection.
2. Outgoing Line Cabinet: Distributes power to loads, motors, and other terminal circuits, providing protection.
3. PT and Voltage Measurement Cabinet: Monitors system voltage and provides overvoltage protection.
4. Metering Cabinet: Integrates energy metering instruments for accurate energy consumption statistics.
5. Busbar Section Cabinet: Enables segmented operation, isolation, and protection of busbar sections.
6. Isolation Cabinet: Provides electrical isolation, ensuring safe maintenance.

Real-World Application Case

Case 1: 10kV Power Distribution Project for a Large Data Center in East China

Project Requirements: The data center requires 99.99% power availability and a zero-fault, highly stable medium-voltage power distribution system to ensure uninterrupted power supply to core loads such as servers and cooling equipment.

Solution: A complete power distribution system was constructed using Usune Kyn28 Switchgear 12kV units, including incoming cabinets, metering cabinets, PT cabinets, and 12 outgoing cabinets. It is equipped with 40kA short-circuit breaking capacity vacuum circuit breakers and intelligent integrated protection devices to achieve rapid fault isolation and precise fault location.

Operational Results: Since its commissioning in 2023, the system has operated without any faults, with a 100% accuracy rate in protection actions. Annual power outage time is less than 5 minutes, fully meeting the high reliability power supply requirements of the data center and effectively avoiding economic losses of tens of millions of dollars due to power failures.

Product External Dimension

Project Reference

Cas-space Rocket Launch Project

Test Report

FAQs

Q1: Is the "five-proof" interlocking of the Kyn28 Switchgear 12kV system a mechanically forced interlocking mechanism, and can it be deactivated?

The Usune KYN28 switchgear's "five-proof" interlocking system employs a purely mechanical, forced interlocking design with no electrical auxiliary unlocking circuit, structurally eliminating the possibility of misoperation. Only professional maintenance personnel can temporarily unlock it using specialized tools under safe conditions of power failure and grounding; it cannot be unlocked during normal operation. This fully complies with IEC and domestic power safety standards, maximizing the safety of operators and equipment.

Q2: Can the product operate normally in high humidity and high altitude environments, and what special treatments are required?

The product's standard humidity tolerance is ≤95% daily average and ≤90% monthly average. The built-in condenser heater automatically dehumidifies, easily handling high humidity environments. For scenarios with altitudes >1000m, it can be used with derating according to power industry standards (approximately 10% derating for every 1000m increase in altitude). Custom-designed reinforced insulation versions are also available to increase creepage distance and meet high-altitude safety operation requirements.