Product Overview
The KYN61-40.5(2) armored movable AC metal-enclosed switchgear (hereinafter referred to as switchgear) is a three-phase AC 50Hz indoor complete power distribution device, rated at 40.5kV and also fully applicable as a high-performance 33kv ais switchgear covering the mainstream medium-voltage levels of 33 kv switchgear and 35 kv switchgear. As a reliable and standardized 33kv switchgear solution for medium-voltage power networks, this metal-enclosed switchgear is specifically designed for receiving and distributing electric energy in power plants, substations, and industrial and mining enterprises. It offers critical functions such as circuit control, protection, and detection, making it ideal for environments that require frequent operations. Additionally, the device is also compatible with metal clad medium voltage switchgear systems, which enhances its versatility and adaptability in various applications.
This metal-enclosed switchgear complies with international standards, including GB/T11022-1999, GB3906-1991, and DL404-1997, ensuring it meets both safety and performance requirements for power distribution in demanding environments.
Enhance performance advantages
Zhejiang Lvma KYN61‑40.5 withdrawable metal‑clad switchgear adopts armored movable cabinet structure for 40.5kV indoor power distribution. Equipped with high‑performance vacuum circuit breaker, the unit delivers excellent short‑circuit withstand capacity and stable breaking performance, supporting frequent switching operations in heavy‑duty working conditions.
The compartmentalized independent cabinet layout achieves clear separation for busbar, circuit‑breaker, cable and control chambers, greatly improving operation safety. Complete mechanical and electrical interlock mechanisms strictly implement five‑prevent functions to avoid mis‑operation during trolley withdrawal‑insertion and maintenance work.
Optimized air‑insulated design brings convenient inspection and component replacement; the withdrawable trolley structure simplifies on‑site maintenance and fault replacement, shortening system downtime. The cabinet body features reliable insulation performance and strong anti‑arc capability, adapting to power plants, substations, mining and large industrial sites. Modular configuration supports flexible scheme expansion, delivering safe, stable and easy‑to‑maintain power control and protection for 33kV‑40.5kV medium‑voltage power networks.
Industry standard (IEC)
KYN61‑40.5 series armored movable metal‑clad switchgear is designed, manufactured and type‑tested in accordance with international IEC standards. The whole metal‑clad assembly complies with IEC 62271‑200, the core standard for AC metal‑enclosed and metal‑clad switchgear up to 52 kV, covering insulation requirement, temperature rise, short‑time withstand current and internal arc test requirements.
The matched vacuum circuit breaker follows IEC 62271‑100, earthing switch and disconnector conform to IEC 62271‑102. Measuring and protection components comply with the IEC 61869 series for instrument transformers. Each cabinet passes full dielectric test, short‑circuit withstand test and mechanical operation test before shipment, to guarantee safety, interchangeability and reliability for global medium‑voltage projects.
Model Meaning
Working Condition
Ambient air temperature: -20°C~+40°C;
Relative humidity: Daily average relative humidity:s 95%;
Daily average water vapor pressure does not exceed 2.2kPa;
Monthly average relative humidity: ≤90%;
Monthly average water vapor pressure does not exceed 1.8kPa;
Seismic intensity: no more than 8 degrees;
The surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.;
A place without severe vibration;
When used under conditions beyond the normal conditions specified in Gb3906,the user should negotiate with the manufacturer.
Technical Data description
Zhejiang Lvma KYN61‑40.5 is indoor air‑insulated withdrawable metal‑clad switchgear for three‑phase AC 50Hz power systems. It applies to rated voltage 40.5kV, and is also suitable for 33kV /35kV medium‑voltage power distribution projects.
Rated Voltage: 40.5 kV (compatible for 33kV, 35kV application)
Rated Frequency: 50 Hz
Structure Type: Armored movable / withdrawable metal‑clad, compartment‑divided cabinet
Main switch element: Matching medium‑voltage vacuum circuit breaker
Rated busbar current: 630A, 1250A, 1600A, 2000A, 2500A
Short‑time withstand current: 20kA, 25kA, 31.5kA (3s‑4s)
Peak withstand current: 50kA, 63kA, 80kA
Operation mode: Spring operating mechanism, support local manual and remote electrical control
Interlock: Full mechanical & electrical five‑prevent interlock system
Installation environment: Indoor installation
Ambient temperature: ‑15℃ ~ +40℃, anti‑condensation heater optional for high‑humidity locations
Note: Above parameters are standard specifications. Custom‑adjustment for current, cabinet layout and auxiliary functions can be realized upon customer project requirements.
Structural Features
The cabinet structure adopts assembly type, and the circuit breaker adopts handcart floor-standing structure;
Equipped with a new type of composite insulation vacuum circuit breaker, which has the characteristics of good interchangeability and simple replacement
The handcart frame is equipped with a screw nut propulsion mechanism, which can easily move the handcart and prevent damage to the propulsion structure due to misoperation;
All operations can be performed with the cabinet door closed;
The interlocking between the main switch, handcart and switchgear door adopts mandatory mechanical locking mode to met the"five protection" functions;
The cable room has ample space to connect multiple cables;
Fast earthing switch for earthing and loop short-circuit;
The protection level of housing is lP3X, and when the handcart room door is open, the protection level is IP2X.
Buying Guide
Follow these key points when selecting KYN61‑40.5 metal‑clad withdrawable switchgear for your medium‑voltage project.
Confirm system electrical parameters Verify your actual system rated voltage: 33kV, 35kV or 40.5kV. Define rated busbar current and short‑circuit withstand level according to grid fault capacity. These values decide vacuum breaker rating, busbar size and overall cabinet configuration.
Evaluate structural and operational demands Choose KYN61‑40.5 withdrawable metal‑clad type if you expect frequent switching, regular maintenance or fast fault‑component replacement. The trolley‑type structure greatly cuts down on‑site repair time. For projects with low‑frequency operation and simple workflow, fixed‑type switchgear can be taken as alternative comparison solution.
Assess site installation condition This model is strictly for indoor installation. Calculate room dimension to reserve enough space for trolley pulling‑out, heat dissipation and routine inspection. For humid, dusty workshops or substations, select anti‑condensation heater and enhanced sealing options.
Confirm functional configuration requirements Clarify incoming & outgoing feeder quantity, protection scheme, metering function, local‑remote control requirement. Standard unit is equipped with complete five‑prevent interlock. Specify if you need earthing switch, arc‑resistant requirement or intelligent monitoring accessories.
Standard compliance & custom solution All units meet IEC 62271‑200 relevant requirements. When standard configuration cannot satisfy project needs, our engineering team supports non‑standard cabinet layout and auxiliary component customization.
Share your single‑line diagram and site condition with our sales team, we will provide targeted model selection and quotation for your power plant, substation or industrial‑mining power distribution project.
Selection advice is for general reference, final solution shall comply with local grid access specifications.
FAQ
Q: What voltage levels is KYN61‑40.5 switchgear suitable for?
A: KYN61‑40.5 is rated at 40.5 kV for 50Hz three‑phase AC indoor systems. It is also fully applicable for 33kV and 35kV medium‑voltage power distribution projects, widely used in power plants, substations, mining and large industrial enterprises.
Q: What are the main advantages of withdrawable metal‑clad structure?
A: The trolley‑type withdrawable design allows the vacuum circuit breaker to be pulled out for inspection, maintenance or quick replacement. It effectively shortens equipment downtime. Independent partition compartments for busbar, breaker, cable and control circuit improve overall operation safety. Complete five‑prevent interlocks prevent mis‑operation.
Q: Can KYN61‑40.5 be installed outdoors?
A: No. This series is indoor air‑insulated metal‑clad switchgear. It must be placed inside substation room. For high‑humidity or condensation‑prone indoor environments, anti‑condensation heaters are available as optional accessories.
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