KYN61-40.5-4000-31.5 Armored Removable AC Metal Enclosed Switchgear

Normal Operating Conditions

• Ambient air temperature:−15°C to+40°C
• Altitude:2,500 m or below
• Humidity conditions:
• Daily average relative humidity≤95%,daily average water vapor pressure≤2.2 kPa
• Monthly average relative humidity≤90%,monthly average water vapor pressure≤1.8 kPa
• Seismic intensity:No more than 8 degree
• Installation site free from significant pollution such as corrosive or flammable gases

Note: If the actual operating conditions exceed the above normal ranges,the user may consult with our company for special arrangements.

Technical Specifications

Ordering Instructions(To be specified when ordering)

1. Main circuit scheme number,application purpose,single-line diagram,arrangement drawing,and layout plan of the distribution room,etc.
2. Schematic diagram of auxiliary circuit wiring and terminal arrangement drawing
3. Model,specification and quantity of electrical components installed in the switchgear
4. Requirements for control,measurement and protection functions of the switchgear,as well as requirements for other interlocking and automatic devices
5. If a busbar bridge connection is required between switchgears or for the incoming cabinet,specific data such as rated current-carrying capacity,span and height above ground level of the busbar bridge shall be provided
6. Type and quantity of required accessories and spare parts
7. Detailed description of special environmental conditions for switchgear operation,if applicable

Structural Features

The product consists of two main parts:the cabinet body and the withdrawable truck.The cabinet is fabricated by bending steel plates, plastic-sprayed and assembled with bolts. Functionally, it is divided into four sections:small busbar chamber, relay and instrument chamber, truck chamber, cable chamber and busbar chamber, which are separated by earthed metal partitions.The protection degree of the cabinet enclosure is IP4X; when the door of the truck chamber is open, the protection degree is IP2X.

The switchgear supports various main circuit schemes, including cable incoming/outgoing, overhead incoming/outgoing, bus tie, isolation, voltage transformer, lightning arrester, etc. The main busbars adopt composite insulation; phase-to-phase insulation and connectors are equipped with insulation sleeves injection-molded from flame-retardant materials.Busbar sleeves are installed between adjacent cabinets to effectively prevent fault spread and provide auxiliary support for the main busbars.The cable chamber is equipped with an earthing switch, overvoltage protection device, etc.

Metal shutters are installed in front of the contact boxes.The upper and lower shutters open automatically as the truck moves from the disconnected/test position to the service position, and close automatically when the truck moves in reverse, providing effective isolation from high voltage.Mandatory mechanical interlocks are adopted among the main switch, truck, earthing switch and cabinet doors to meet the requirements of the“five-prevention”functions.

The circuit breaker truck uses a screw drive operating mechanism with an overrunning clutch.The screw-nut feeding mechanism enables smooth movement of the truck between the test position and service position.The self-locking feature of the screw nut ensures reliable locking of the truck at the service position, preventing accidents caused by truck displacement under electrodynamic force.The overrunning clutch engages when the truck travels to or retracts from the service position, automatically disengaging the operating shaft from the screw shaft to allow idling, thus avoiding damage to the feeding mechanism due to misoperation. Other trucks adopt a lever-type feeding mechanism and are locked by positioning pins at the test and service positions.

Overall dimensions(Width×Depth×Height, mm): 1400×2800(3000)×2600