KYN28-12 Indoor Metal-Clad Withdrawable Medium-Voltage Switchgear

Product Composition

•  KYN28-12 Medium-Voltage Switchgear adopts a standard four-compartment segregated structure with complete physical separation between high-voltage and low-voltage sections. This structural design effectively eliminates electromagnetic interference, insulation risks and fault propagation, ensuring high operational safety and convenient routine maintenance in global medium-voltage engineering applications.

High-Voltage Busbar Compartment (Rear Upper Section)

• Configuration: Main busbar, branch busbars, insulated busbar supports.
•  Function: Acts as the main power trunk of the switchgear for central power collection and distribution.
• Advantages: Fully enclosed independent structure prevents dust accumulation on busbars, moisture ingress, creepage and flashover. It isolates busbar faults from other compartments and avoids large-area equipment damage and system power outages.

Circuit-Breaker Compartment (Middle Section)

•  Configuration: Vacuum circuit-breaker withdrawable truck, precision guide rails, mechanical and electrical interlocks, independent arc pressure relief duct.
• Function: Core operating compartment for circuit closing, tripping and load switching.
• Advantages: Optimized middle-mounted structure provides stable mechanical performance and sufficient insulation distance. The withdrawable truck allows quick replacement and maintenance without cabinet disassembly, greatly shortening outage time. The dedicated pressure relief duct safely releases internal arc energy and prevents cabinet deformation or personal injury.

Cable Compartment (Lower Section)

•  Configuration: Incoming/outgoing high-voltage cables, earthing switch, current/voltage transformers, surge arresters.
• Function: Provides cable connection, line parameter measurement, lightning protection and earthing protection. Advantages: Spacious bottom layout facilitates easy wiring and maintenance. The sealed structure provides excellent dust and moisture resistance, solving common field problems such as cable joint oxidation, moisture-induced leakage and lightning surge breakdown.

Secondary Control Compartment (Front Upper Section)

• Configuration: Protection relays, measuring and control instruments, operation pushbuttons, secondary terminal blocks, communication modules.
• Function: Responsible for signal acquisition, logic control, data transmission and remote system operation.
• Advantages: Completely isolated from high-voltage live parts to avoid electromagnetic interference. It eliminates secondary signal disorder, false tripping and unstable data, ensuring accurate and reliable system protection.

Product Parameters

Product Functions

• Adaptable to global mainstream medium-voltage systems including 10kV, 11kV and 13.8kV, the switchgear integrates five core functions to resolve typical operational and maintenance pain points in modern medium-voltage power distribution, fully meeting intelligent and high-standard engineering requirements.

Power Switching and Distribution Control

• Supports medium-voltage power intake, load regulation and power distribution for multi-standard grid systems. It enables local manual operation, remote electric control and automatic spring-charged switching. Suitable for long-term continuous operation and frequent load switching with high operational stability and fault tolerance.

Full-Range Electrical Protection

• Integrates overload, short-circuit, earth fault, overvoltage and undervoltage protection functions. It responds to abnormal grid conditions within milliseconds and trips automatically, preventing equipment damage and grid fluctuation impact, and ensuring stable power system operation.

Real-Time Monitoring and Early Warning

• Real-time monitors three-phase voltage, current, power and primary contact temperature. It accurately identifies arc fault signals and supports fault pre-warning, event recording and data storage. It transforms traditional post-fault maintenance into proactive risk detection and greatly improves system safety and stability.

Intelligent Remote Operation and Maintenance

• Seamlessly connects with SCADA and smart grid systems to support remote status monitoring, remote switching control and unattended operation. It effectively reduces manual inspection workload and addresses the issues of slow response and operational inefficiency in traditional maintenance modes.

Mechanical and Electrical Five-Interlock System

• Equipped with dual mechanical and electrical mandatory interlocking devices to prevent five typical hazardous operations: withdraw the truck under load, close the earthing switch on a live circuit, close the circuit-breaker with earthing applied, access live compartments, and perform incorrect switching operations. It complies with both domestic and international IEC acceptance standards.

Product Advantages

• Superior Safety Performance: Fully enclosed metal-clad segregated structure with independent pressure relief ducts effectively resists internal arc faults and restricts fault propagation, exceeding general industry safety standards.
•  Complete Anti-Misoperation Design: Upgraded dual interlocking system provides hardware-level safety protection against human errors, fully compliant with State Grid and China Southern Power Grid standards, as well as international medium-voltage operation standards.
• Wide Grid Compatibility: Optimized middle-mounted structure delivers excellent insulation, moisture resistance and voltage-withstand performance, supporting stable long-term operation for 10kV, 11kV and 13.8kV global medium-voltage systems with an ultra-low failure rate.
• High Maintenance Efficiency: Highly interchangeable vacuum-breaker truck can be fully withdrawn for replacement without busbar power outage, minimizing system downtime and operational losses.
• Safe and User-Friendly Operation: Supports door-closed switching operation, avoiding direct contact with live high-voltage components and ensuring operator safety.
•  Strong Intelligent Expandability: CNC-integrated cabinet construction with anti-corrosion surface treatment supports modular intelligent upgrades, adaptable to new construction and renovation projects of global medium-voltage smart power grids.

Application Scenarios

• Municipal Power Projects: Ideal for urban substations and distribution switching stations, providing stable grid power supply and meeting international municipal engineering acceptance standards.
• Industrial Power Distribution: Widely used in industrial parks and factory distribution rooms, supporting 24-hour continuous production power supply and multi-voltage-level medium-voltage power management.
• Public and Civil Buildings: Suitable for shopping malls, hospitals, schools and office buildings. Featuring low noise, high stability and low failure rate, it perfectly fits high-reliability public power supply scenarios.
• Renewable Energy and Infrastructure Projects: Perfect for photovoltaic and wind power grid-connected distribution systems, accommodating voltage fluctuations in 11kV and 13.8kV grid operations. Also applicable to rail transit and other large-scale infrastructure medium-voltage power projects.

Technical Highlights

• Optimized and upgraded by addressing the operational shortcomings of conventional switchgear, the GoWatron KYN28-12 fully adapts to global 10kV, 11kV and 13.8kV medium-voltage systems, delivering superior technical performance for high-standard international power projects.

• High-Reliability Insulation and Arc-Resistance Technology: Adopts vacuum arc extinction and composite insulation structure to eliminate creepage and flashover risks. Independent directional pressure relief ducts rapidly release arc pressure and prevent fault escalation.
• Standardized Five-Interlock System: Dual mechanical and electrical mandatory interlocks completely eliminate operational errors, fully complying with IEC and domestic power safety regulations.
•  High-Precision Withdrawable Truck System: Precision guide rail design ensures smooth truck movement, accurate positioning and strong interchangeability without complex calibration, effectively reducing maintenance time and operational costs.
• High-Strength Anti-Corrosion Cabinet Construction: CNC-integrated cabinet construction with electrostatic powder coating and passivation anti-corrosion treatment provides excellent dustproof, moisture-proof and anti-aging performance. IP4X protection rating adapts to various complex indoor working conditions.
• Modular Intelligent Upgrade Design: Reserved modular structure allows optional installation of temperature monitoring, arc detection and wireless communication modules without system shutdown, compatible with traditional grid retrofits and new intelligent medium-voltage projects across global markets.