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China KYN28A-12 Mid-mounted Cabinet Suppliers | 10kV Armored Enclosed Switchgear Factory
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China KYN28A-12 Mid-mounted Cabinet Suppliers | 10kV Armored Enclosed Switchgear Factory

The 10kV mid-mounted cabinet, known as Armored Enclosed Switchgear (AEI), is an essential power distribution device in electrical systems for energy reception and distribution. Its design features a circuit breaker trolley centrally located within the cabinet, ensuring efficient operation. This equipment is extensively utilized in various sectors, including industrial and mining facilities, infrastructure projects, and 10kV substations. As a critical component, it offers vital functions such as control, protection, monitoring, and isolation. Sourced from reliable China suppliers, our factory ensures high-quality manufacturing standards and compliance, making it a trusted choice for power distribution needs
  • Model KYN28A-12
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Product Details

● Product Overview

The product features a highly modular design. Key components such as the circuit breaker and isolation carriage are mounted on a removable cart, enabling flexible operation and easy maintenance through multiple positioning states — including working, testing, isolation, and removal.

The cabinet is constructed from high-quality aluminum-zinc coated steel plates through multiple bending processes, forming a fully enclosed metal armor structure. It is divided into isolated compartments — busbar room, circuit breaker cart room, cable room, and instrument relay room — ensuring operational safety and preventing fault escalation.

● Core Design Features
🔩
Modular Architecture

Circuit breaker and isolation carriage mounted on a removable cart for flexible multi-state operation: working, testing, isolation, and removal.

🛡️
Fully Enclosed Metal Armor

High-quality aluminum-zinc coated steel plates formed through multiple bending processes, providing robust mechanical and electrical protection.

🗂️
Isolated Compartments

Divided into busbar room, circuit breaker cart room, cable room, and instrument relay room — preventing fault escalation and ensuring safety.

🔐
Five-Prevention Locking

Comprehensive "five-prevention" interlocking mechanism effectively prevents accidental operation and misuse in all service conditions.

📡
Intelligent Protection

Optional integrated protection devices enable intelligent measurement and protection for advanced distribution network management.

📋
Standards Compliance

Designed in strict compliance with domestic and international standards including GB and IEC, ensuring global applicability and reliability.

● Core Technical Specifications
⚡ Rated Performance Parameters
Rated Current 1250A — 3150A
Short-Circuit Breaking Capacity 25kA — 40kA
Cabinet Construction Aluminum-zinc coated steel, fully enclosed metal armor
Compartment Division Busbar room / Circuit breaker cart room / Cable room / Relay room
Locking Mechanism Comprehensive five-prevention interlocking system
Protection Option Integrated intelligent measurement & protection devices (optional)
Compliance Standards GB / IEC and other domestic & international standards
● Key Advantages
✔ High Reliability ✔ Compact Structure ✔ User-Friendly Operation ✔ Safe Maintenance ✔ GB & IEC Compliant ✔ Intelligent Protection Ready
💬 Frequently Asked Questions
Q What does the "five-prevention" locking mechanism protect against?
The "five-prevention" interlocking system is designed to prevent five types of accidental operations: closing or opening the circuit breaker with load, pulling out or inserting the cart while the breaker is closed, grounding while energized, closing the breaker onto a grounded circuit, and entering a live compartment. This mechanism significantly enhances operational safety.
Q What are the available operating states of the removable cart?
The removable cart supports four distinct positioning states: Working (fully connected for normal operation), Testing (secondary circuits connected, primary circuits disconnected), Isolation (all circuits disconnected but cart still inside), and Removal (cart fully withdrawn from the cabinet for maintenance or replacement).
Q What is the rated current range and short-circuit breaking capacity of the mid-mounted cabinet?
The mid-mounted cabinet typically supports a rated current range of 1250A to 3150A and a short-circuit breaking capacity of 25kA to 40kA, making it suitable for medium and large-scale power distribution applications in modern electrical networks.
Q Which international standards does this product comply with?
This product is designed in strict compliance with both domestic Chinese standards (GB series) and internationally recognized standards from the IEC (International Electrotechnical Commission). This dual compliance ensures the product meets global quality, safety, and performance requirements for distribution switchgear.
Q Why is the cabinet divided into separate compartments?
The cabinet is divided into four isolated compartments — busbar room, circuit breaker cart room, cable room, and instrument relay room — to contain any potential faults within a single zone. This compartmentalization prevents fault escalation (such as arc flash propagation), protects personnel during maintenance, and ensures continuous operation of unaffected sections during a localized fault.
Q Can intelligent protection and measurement devices be integrated into the cabinet?
Yes. The mid-mounted cabinet supports optional integrated protection devices that enable intelligent measurement and protection functions. These devices allow real-time monitoring of electrical parameters, automated fault detection, and remote control capabilities, making the cabinet fully compatible with modern smart distribution network infrastructure.