KYN61-40.5 Armored Metal-Clad Switchgear (40.5kV)
KYN61-40.5 40.5kV armored metal-clad withdrawable switchgear, 1250–2500A main busbar, 25–31.5kA short-time withstand (4s), 63–80kA peak withstand, 95/118kV power-frequency withstand, 185/215kV lightning impulse. APG epoxy casting and solid insulation design, tubular busbar, handcart withdrawable mechanism. IEC 62271-200 & GB3906 compliant.
KYN61-40.5 Armored Metal-Clad Switchgear (40.5kV)
Raydafon KYN61-40.5 is an armored metal-clad withdrawable AC switchgear designed for 40.5kV three-phase AC 50Hz power systems. The KYN61-40.5 switchgear is used in power plants, substations, and industrial and mining enterprises for receiving and distributing electrical energy, and for controlling, protecting, and detecting circuits. Compliant with IEC 62271-200, GB/T 3906, and GB/T 11022, the KYN61-40.5 switchgear adopts advanced APG epoxy casting and reliable solid full insulation busbar technology, with good electric field distribution. It is a miniaturized power distribution equipment with advanced technology, stable performance, reasonable structure, convenient use, safety and reliability.
40.5kV Rated Voltage 1250–2500A Main Busbar 25–31.5kA / 4s Withstand IEC 62271-200 Compliant
Product Overview
The KYN61-40.5 armored movable AC metal enclosed switchgear is suitable for three-phase AC 50Hz power systems, used to receive and distribute electrical energy, and to control, protect, and detect circuits. The KYN61-40.5 switchgear can be equipped with SF6 circuit breakers, handcart vacuum circuit breakers, and advanced and reliable control and protection units for the secondary circuit. The product adopts advanced epoxy casting and reliable solid full insulated bus technology for full insulation design, with good electric field distribution. The KYN61-40.5 switchgear is a miniaturized power distribution equipment with advanced technology, stable performance, reasonable structure, convenient use, safety and reliability.
Four Compartment Architecture
Busbar Room
Houses the main busbar system with APG epoxy casting insulation. Separated from other compartments by grounded metal partitions.
Circuit Breaker Room
Contains the withdrawable handcart with ZN85, VD4, HVX, 3AE8, or VN1 vacuum circuit breaker. Front-accessible for maintenance.
Cable Room
For incoming and outgoing cable termination. Bottom cable entry with space for cable lugs and current transformers.
Instrument Room
Houses protection relays, metering instruments, and control devices. Low-voltage wiring separated from high-voltage circuits.
Technical Specifications
Rated Parameters
Rated Voltage40.5 kV
Rated Frequency50 / 60 Hz
Main Busbar Rated Current1250 / 1600 / 2000 / 2500 A
Branch Busbar Rated Current1250 / 1600 / 2000 A
Short-Time Withstand Current (4s)25 / 31.5 / 40 kA
Rated Peak Withstand Current63 / 80 kA
Insulation & Protection
Power-Frequency Withstand Voltage95/118 kV
Lightning Impulse Withstand Voltage185/215 kV
Enclosure Protection (closed)IP4X
Enclosure Protection (door open)IP2X
Auxiliary Power SupplyDC/AC 110 / 220 V
Overall Dimensions1400(1680)×2800(3100)×2600 mm
Core Technology Advantages
APG Epoxy Casting Insulation
The KYN61-40.5 switchgear adopts APG epoxy casting and reliable vulcanization insulation technology for all solid insulation design. The composite insulation structure using AGP technology and the insulation busbar using epoxy vulcanization technology adopt a new type of contact box with interphase insulation partition and current transformer. The live parts are fully insulated and sealed, further improving the insulation of the switchgear.
Tubular Busbar Design
The main and branch busbars of the KYN61-40.5 switchgear adopt a tubular design, further optimizing the electric field distribution. D-type or O-type busbars are used to further improve the electric field distribution, making the cabinet structure compact and with high insulation strength. The uniform distribution of the pole electric field avoids the damage of local electric field concentration to organic insulation.
Rotary Folding Metal Valve
The KYN61-40.5 switchgear adopts a unique rotary folding metal valve design. The upper and lower valves are coupled and driven flexibly and labor-saving. When the valve is opened, it has sufficient air distance to improve electrical insulation performance. The handcart design reduces the force arm of the electric repulsion force between the dynamic and static contacts, enhancing the dynamic and thermal stability of the movable electrical connection of the primary conductive circuit.
Fully Mechanical Interlocking
The KYN61-40.5 switchgear features high reliability with fully mechanical locking. It can automatically detect temperature and humidity, and can be equipped with microcomputer automation control and protection devices. The switchgear has good interchangeability, wide applicability, and meets the needs of various different occasions with a universal mechanical interlocking device.
Multi-Brand Circuit Breaker Compatibility
The KYN61-40.5 switchgear can be used in conjunction with various circuit breakers such as ZN85, VD4, HVX, 3AE8, and VN1, and is equipped with a universal mechanical interlocking device. The switchgear is equipped with high-performance circuit breakers with unique sealing design, large creepage distance, high mechanical strength, and high component accuracy.
Modular Armor Technology
The KYN61-40.5 switchgear adopts an integrated three-dimensional structural design and is made of imported aluminum coated zinc plate and modular armor technology, assembled through multiple bends. It has the characteristics of high precision, high corrosion resistance, and strong variability. The shell and partitions between each functional unit are made of aluminum zinc coated steel plates bent and riveted.
Reliable Structure & Operation
Fixed Cabinet Body
The KYN61-40.5 switchgear consists of two main parts: a fixed cabinet body and movable components. According to the functions of the electrical equipment inside the cabinet, the cabinet is divided into four different functional units: busbar room, circuit breaker room, cable room, and instrument room.
Withdrawable Handcart
The removable parts of the KYN61-40.5 switchgear are equipped with SF6 circuit breaker, handcart circuit breaker, and voltage transformer handcart. The handcart design allows for flexible and lightweight operation, reducing maintenance time and improving operational safety.
Live Display Device
The KYN61-40.5 switchgear is equipped with a live display device to detect the operation of the primary circuit. The device consists of two parts: a high-pressure sensor and a display. The sensor is installed on the feeder side, and the display is installed on the low-voltage compartment panel.
Industry Applications
Power Plants
Power transmission for small and medium-sized generators in power plants. The KYN61-40.5 switchgear provides reliable control, protection, and detection for generator auxiliary systems. Pair with medium voltage switchgear for complete plant distribution.
Substations
Secondary electrical substations of power systems requiring reliable 40.5kV medium voltage distribution. The four-compartment design ensures fault containment and allows safe maintenance. Integrates with YBM prefabricated substations for compact distribution solutions.
Industrial & Mining Enterprises
Power receiving and transmission in factories, mining operations, and industrial facilities. The IP4X enclosure protects against dust ingress in harsh environments. Compatible with low voltage switchgear for downstream distribution.
High-Voltage Motor Control
Control, protection, and detection of large high-voltage motors in industrial applications. The KYN61-40.5 switchgear supports vacuum and SF6 circuit breakers for motor starting and protection. Pair with Remote-9001 monitoring units for intelligent motor control.
Why Choose Raydafon KYN61-40.5 Switchgear
20+ Years of Power Equipment Experience
Raydafon Technology Group has served the electrical equipment industry for over two decades, with products deployed across 40+ export countries. The KYN61-40.5 switchgear is a core product line in the RAYDAFON medium voltage switchgear portfolio.
IEC & Type-Test Compliance
All KYN61-40.5 switchgear units are type-tested to IEC 62271-200 and GB/T 3906, with routine factory acceptance tests (FAT) documented and shipped with every unit. Type-test reports available on request.
Complete Switchgear Portfolio
Raydafon also manufactures KYN28A-24 switchgear for 24kV applications and KYN28A-12 switchgear for 12kV systems, providing a complete medium voltage switchgear range for all distribution voltage levels.
Full Documentation & After-Sales
Installation drawings, single-line diagrams, circuit breaker test reports, and component authenticity records ship with every KYN61-40.5 switchgear. Engineering support responds within 24 hours.
Frequently Asked Questions
What is KYN61-40.5 switchgear?
KYN61-40.5 is an armored metal-clad withdrawable AC switchgear designed for 40.5kV three-phase AC 50Hz single-busbar and single-busbar segmented power systems. It is used in power plants, substations, and industrial enterprises for receiving and distributing electrical energy, and for controlling, protecting, and monitoring circuits. The switchgear features four separate functional compartments and is compatible with SF6 circuit breakers, handcart vacuum circuit breakers, and voltage transformer handcarts.
What are the main technical parameters of KYN61-40.5 switchgear?
KYN61-40.5 switchgear supports rated voltage 40.5kV, rated frequency 50/60Hz, main busbar rated current 1250/1600/2000/2500A, and branch busbar rated current 1250/1600/2000A. The rated short-time withstand current is 25/31.5/40kA for 4 seconds, and peak withstand current is 63/80kA. Power-frequency withstand voltage is 95/118kV for ground and fracture, lightning impulse withstand voltage is 185/215kV. Enclosure protection is IP4X with door closed and IP2X with door open.
What insulation technology does KYN61-40.5 switchgear use?
KYN61-40.5 switchgear uses APG epoxy casting and epoxy vulcanization technology for full solid insulation design. The main and branch busbars adopt a tubular design to optimize electric field distribution. A composite insulation structure with AGP technology and a new type of contact box with interphase insulation partition is used. The live parts are fully insulated and sealed, and D-type or O-type busbars are used to further improve electric field distribution.
What circuit breakers are compatible with KYN61-40.5 switchgear?
KYN61-40.5 switchgear is compatible with ZN85, VD4, HVX, 3AE8, and VN1 vacuum circuit breakers, as well as SF6 circuit breakers. The handcart design uses a universal mechanical interlocking device, providing good interchangeability and wide applicability. The rotary folding metal valve design allows the upper and lower valves to be coupled and driven flexibly, providing sufficient air distance when opened.
What standards does KYN61-40.5 switchgear comply with?
KYN61-40.5 switchgear complies with IEC 62271-200 for AC metal-enclosed switchgear and controlgear, GB/T 3906 for 3.6kV–40.5kV AC metal-enclosed switchgear and control equipment, and GB/T 11022 for common specifications for high-voltage switchgear and controlgear standards. The switchgear meets the requirements for three-phase AC 50Hz power systems.
What are the typical applications of KYN61-40.5 switchgear?
KYN61-40.5 switchgear is suitable for three-phase AC 50Hz power systems in power plants, substations, and industrial and mining enterprises. It is used to receive and distribute electrical energy and to control, protect, and detect circuits. The switchgear can be equipped with microcomputer automation control and protection devices, and can automatically detect temperature and humidity. It is suitable for 35kV distribution systems and high-voltage motor control applications.
Related Equipment
For a complete medium voltage distribution solution, pair the KYN61-40.5 switchgear with:
- KYN28A-24 Removable AC Metal-Clad Switchgear — For 24kV medium voltage applications
- KYN28A-12 Removable AC Metal-Clad Switchgear — For 12kV medium voltage applications
- Ring Main Units (RMUs) — For SF6 or SF6-free ring network applications
- Low Voltage Switchgear — For downstream LV distribution
- YBM Prefabricated Substations — For compact distribution solutions with factory-integrated MV switchgear
- Remote-9001 Monitoring Unit — For SCADA integration and intelligent switchgear monitoring
40.5kV rated voltage, up to 2500A main busbar
25–31.5kA / 4s short-time withstand
APG epoxy casting solid insulation
Four-compartment metal-clad structure
ZN85 / VD4 / HVX / 3AE8 / VN1 compatible
IEC 62271-200 & GB/T 3906 compliant
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