KYN61-40.5 Armored Metal Clad Switchgear — 35kV Draw-out AC Switchgear for Power Systems

 

The KYN61-40.5 is an armored draw-out metal clad switchgear rated at 40.5kV, purpose-built for three-phase 50Hz 35kV switchgear applications in power system infrastructure.

 

Designed for substations, power plants, and industrial distribution networks, this metal clad switchgear provides integrated control, protection, and monitoring functions across the full operating voltage range. It is widely used in power plants, substations, and industrial/mining distribution rooms for receiving and distributing electrical energy, with integrated control, protection, and monitoring functions.This metal clad switchgear is widely deployed in power system infrastructure including utility substations, industrial power distribution, wind and solar generation facilities.

 

As a core component in modern power system switchgear infrastructure, the KYN61-40.5 meets GB 3906, GB/T 11022, DL/T 404, and IEC 60298 standards, making it suitable for export projects across Africa, the Middle East, and Southeast Asia.

 

A key feature of this drawout switchgear is its flexible circuit breaker configuration: it can accommodate domestic ZN85-40.5 vacuum circuit breakers as well as SF6 breakers from French Schneider (SF series) or Alstom (FP series), meeting diverse user requirements.

 

The cabinet is assembled from high-quality steel plate or zinc-aluminum-deposited plate through precision bending. This improves the matching accuracy between the handcart and the cabinet, allowing the handcart to move forward and engage very smoothly, with excellent interchangeability.

1) Ambient air temperature: -15℃~+40℃, average daily temperature ≤35℃.

2) Altitude ≤1000m.

3) Humidity conditions: daily average relative humidity ≤95%, daily average water vapor pressure ≤2.2KPa; monthly average relative humidity ≤90%, monthly average water vapor pressure ≤1.8KPa.

4) Earthquake intensity ≤ 8 degrees.

5) The surrounding air is not subject to corrosive gases, flammable gases, water vapor or salt spray and other obvious pollution.

6) No serious filth and frequent severe vibration.

Note: If the product use environment does not meet the above conditions, please contact us, we will provide you with solutions free of charge.

Why This 35kV Metal Clad Switchgear Outperforms Open-Type Designs

The armored metal clad switchgear configuration of the KYN61-40.5 provides a decisive safety advantage over open-type and non-armored panels. Each functional zone - busbar compartment, circuit breaker compartment, cable compartment, and low-voltage control room - is fully segregated by grounded metallic barriers with independent pressure relief channels. In the event of an internal arc fault, energy is contained within the affected compartment and vented safely, preventing damage from spreading across the lineup.

For 35kV switchgear applications where personnel safety and operational continuity are both critical, this armored construction eliminates the arc propagation risk that affects non-compartmentalised designs, and remains the specification of choice for utility substations and primary industrial distribution worldwide.

Modular Compartmentalization

The cabinet is constructed from bolted aluminum-zinc or thin steel plates and is divided into four distinct, metal-partitioned sections:

• Relay Instrumentation Room
• Circuit Breaker Room
• Cable Room
• Busbar Room

 

Each compartment includes an independent pressure release channel for enhanced safety.

Flexible Main Circuit Configurations

Supports a wide range of solutions to meet diverse operational needs:

• Inlet/outlet (cable or overhead) and busbar liaison.
• Isolation, voltage transformers, and surge arresters.
• Composite insulation is used throughout the product.

Advanced Busbar & Cable Management

• Sectionalized Busbars: Separated by casings to prevent accident spreading and provide auxiliary support.
• Spacious Cable Room: Equipped with current transformers and grounding switches, designed to facilitate the connection of multiple cables easily.

Robust Protection & "Five-Proof" Interlocking

• Protection Rating: IP4X enclosure rating (IP2X when the breaker room door is open and the trolley is in test position).
• Safety Flaps: Metal flaps automatically isolate contacts as the trolley moves.
• Mechanical Interlocking: Mandatory "five-proof" mechanical locks between the main switch, trolley, earthing switch, and door, allowing for safe operation while the door is closed.

Precision Propulsion Mechanism

The handcart/trolley utilizes a screw nut propulsion mechanism combined with an overrunning clutch:

• Reliable Locking: The self-locking screw prevents accidental movement caused by electric force.
• Misoperation Protection: The overrunning clutch automatically disengages the shaft at end-positions to prevent mechanical damage.

Must Be Specified When Ordering:

1) Main circuit program number, main wiring system diagram, arrangement diagram, floor plan;

2) Auxiliary circuit and control circuit wiring schematic diagram, terminal arrangement diagram;

3) Model, specification and quantity of components in the cabinet;

4) Whether over-voltage protector is added to the circuit breaker handcart;

5) The color of the cabinet and panel (if the user does not have special requirements, according to the provisions of the Company);

6) Special use of environmental conditions and other requirements.

Note: If the project usage conditions exceed the above specifications, please contact us for a customized solution. We are committed to providing the best adaptive solutions for your unique needs.

Structural Reliability and Environmental Adaptability

Intelligent Operation and Maintenance Capabilities

Adaptability to New Energy Scenarios

Conclusion‌: KYN61-40.5 leverages the triple advantages of "structural reinforcement + intelligent monitoring + renewable energy customization" to provide a comprehensive end-to-end solution from equipment to system level for high-reliability distribution scenarios.‌‌

The KYN61-40.5 drawout switchgear is engineered to perform reliably across a variety of demanding environments:

Withstands frequent switching operations and fluctuating loads; supports anti-islanding and reverse power protection.

Handles DC-to-AC inversion harmonics and provides rapid fault clearing to protect grid connection.

Enables fast remote control (four‑remotes) and coordinates with battery management systems (BMS).

Provides compact, IP4X protection against dust and moisture in steel mills, cement plants, and chemical plants.

Acts as incoming or outgoing feeder switchgear with busbar coupling and voltage transformer solutions.

In all these scenarios, the drawout design simplifies maintenance – a faulty breaker can be withdrawn and replaced in minutes, minimizing downtime.

For projects requiring a withdrawable metal clad switchgear solution at the 10kV voltage level, see the KYN28A-12 Armored Drawout AC Metal-Clad Switchgear product page. For a full comparison of withdrawable versus fixed-type 35kV switchgear configurations, refer to our technical guide: Truck Type Switchgear vs Fixed Type - A 35kV Project Buyer's Decision Guide.

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