KYN28-12KV Air Insulated Metal Clad Switchgear For Indoor Distribution Equipment

A、 Bus Room C、 Cable Room B、 breaker handcart D、 Relay Instrumentation Room 1. housing 11. Ground main bus 2. Branch Bus 12. Handling partitions 3. busbar casing 13. Partition (valve) 4. main bus 14. Secondary plug 5. static contact 15. Circuit breaker handcart 6. static contact box 16. Heating devices 7. Current Transformer 17. Horizontal partitions 8. ground switch 18. Ground switch operating mechanism 9. cable 19. Secondary grooves 10. Lightning arresters 20. Floor 21. Pressure relief devices

 Installation dimensions

Features & Applications

2.1 Withdrawable VCB Modules

• VS1 Vacuum Breakers: Rated up to 12 kV; life > 30 000 operations.
• Racking Positions: Test, Service (ON), and Isolated (OFF) with mechanical interlocks.
• Safety Interlocks: Prevent racking under load, closing when grounded, or opening enclosure doors unsafely.

2.2 Robust Metal-Clad Enclosure

• Cold-Rolled Steel Panels: Powder-coated for corrosion resistance.
• Compartmentalization: IP4X front face; IP2X between compartments.
• Cable Access: Top or bottom entry; removable gland plates simplify cable terminations.

2.3 Protection & Monitoring

• Primary Protection: Overcurrent, earth-fault relays; optional distance or differential modules.
• Digital Upgrades: IEC 61850-compatible relays, busbar and mechanism temperature sensors, partial-discharge monitors.
• SCADA Integration: Modbus or DNP3 communication for remote control and data logging.

2.4 Typical Applications

• Power Plants: Feeder and unit auxiliary distribution.
• Industrial Facilities: Motor starting centers, mining operations.
• Commercial Complexes: Data centers, campuses, hospitals.
• Secondary Substations: Indoor vaults serving local networks.

Differentiators

1. SF₆-Free Vacuum Technology

   • Eco-friendly vacuum interrupters with high breaking capacity and low maintenance.

2. Modular Scalability

   • Add or reconfigure bays for feeders, transformer feeds, capacitor banks, or cable terminations.

3. Enhanced Safety Interlocks

   • Prevent human error with mechanical/electrical locks on racking, earthing, and access doors.

4. Digital Readiness

   • Pre-wired for online sensors and digital relays—supports predictive maintenance.

5. Space & Cost Efficiency

   • Narrow aisles and compact racks reduce room size and installation cost.

Selection & Purchase Guidance

1. Voltage & Fault Levels

   • Match switchgear ratings to system voltage (3.6–12 kV) and prospective short-circuit currents (+20% margin).

2. Current Ratings & Future Growth

   • Size busbars and breakers for present loads with 20–30% headroom.

3. Bus Configuration

   • Single-bus for simplicity; sectionalized or double-bus for redundancy.

4. Environmental Factors

   • Verify room temperature, humidity, and corrosive atmosphere; choose protective coatings if needed.

5. Control & Communication

   • Specify relay protocols (IEC 61850, Modbus) matching your SCADA/DCS.

6. Maintenance Strategy

   • Opt for withdrawable modules and digital monitoring to minimize downtime.

6. FAQs

Q1: How does vacuum interrupter AIS compare to SF₆ GIS at 12 kV?
A1: AIS with vacuum technology avoids SF₆ gas monitoring and lowers maintenance. For indoor 12 kV use, AIS offers a simpler, greener, cost-effective solution with comparable performance.

Q2: Can KYN28 integrate digital relays?
A2: Yes. The KYN28 can house IEC 61850 or Modbus-enabled relays, plus busbar temperature and partial-discharge sensors, enabling remote monitoring and predictive maintenance.

Q3: What maintenance is required for withdrawable VCB modules?
A3: Annual inspection of racking rails, lubrication of mechanism, and functional tests every 3–5 years. Vacuum interrupters themselves typically require minimal overhaul.

Conclusion

ZHENGXI’s KYN28-12 kV Air-Insulated Metal-Clad Switchgear merges safety, efficiency, and flexibility in a compact, SF₆-free package. Ideal for indoor medium-voltage distribution, it supports robust protection, easy maintenance, and future digital upgrades.

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