Introduction
The KYN-28 series of indoor metal-clad withdrawable switchgear continues to set industry benchmarks in power distribution systems. Designed for 3.6~24kV three-phase AC 50Hz networks, this advanced switchgear ensures reliable control, protection, and monitoring of electrical systems across power plants, substations, and industrial facilities .
Core Working Principle
The KYN-28 operates on a modular, compartmentalized structure to enhance safety and efficiency. Its key functional components include:
Busbar Chamber: Houses insulated copper or aluminum busbars for power transmission, designed with IP4X protection to prevent dust ingress and ensure stability under high-current conditions .
Circuit Breaker Compartment: Equipped with a withdrawable vacuum breaker (compatible with VD4, VS1, or 3AH5 models), allowing seamless insertion/removal via a racking mechanism. The breaker’s “plug-and-play” design minimizes downtime during maintenance .
Cable Chamber: Supports cable terminations and integrates grounding switches for safe isolation. Pressure relief panels automatically deploy during internal faults to redirec arc energy, protecting personnel .
Low-Voltage Control Room: Hosts protection relays, meters, and control circuits, ensuring real-time monitoring and compliance with IEC 62271 standards .
Safety and Interlocking Mechanisms
The KYN-28 incorporates a robust “five-prevention” interlock system to eliminate operational hazards:
Prevents circuit breaker close the switch in non-test positions. .
Blocks access to live compartments (IP2X protection when doors are open) .
Ensures grounding switches engage only when the breaker is isolated .
Technical Specifications
Rated Parameters: Voltage up to 24kV, current capacity 630–4000A, short-circuit withstand up to 50kA/4s .
Environmental Resilience: Operates at altitudes ≤1000m, temperatures -15°C to +40°C, and humidity ≤95% .
Certifications: Complies with IEC 298, GB3906-91, and IEC 62271-200/201 standards .
Applications and Advantages
Widely adopted in medium-voltage grids, the KYN-28 excels in:
Power plant generator connections.
Substation busbar segmentation.
Large motor control and protection .
Its modular design enables flexible configurations, including PT, capacitor, and transformer feeder cabinets .
Commitment to Sustainability
The KYN-28’s construction reduces corrosion and extends lifespan, while its low-loss vacuum interrupters enhance energy efficiency .
Conclusion
As industries prioritize grid reliability and safety, the KYN-28 remains a cornerstone of modern power distribution. For technical inquiries or customization options, visit Manufacturer’s Website or contact our engineering team.
References: Integrated from technical documents and operational guidelines .
Post time: Jun-25-2025
