01
KYN28A-24 Armored Removable AC Metal-Enclosed Switchgear
Model and Definitions
Application Conditions
◇ Ambient Air Temperature: Maximum temperature 40℃, minimum temperature -15℃;
◇ Relative Humidity: Daily average not exceeding 95%, daily average vapor pressure not exceeding 2.2 kPa; monthly average not exceeding 90%, monthly average vapor pressure not exceeding 1.8 kPa;
◇ Altitude: 1000m and below;
◇ Seismic Intensity: Not exceeding 8 degrees;
◇ Surrounding air should not be significantly polluted by corrosive or flammable gases, water vapor, etc.;
◇ No frequent severe vibration in the area;
◇ If used under conditions exceeding the normal environmental conditions specified in GB3906, it should be negotiated between the user and the manufacturer.
Technical Specifications
| ltems | Units | Data | ||||
| Nominal Voltage | kV | 24 | ||||
| Rated Frequency | Hz | 50 | ||||
| Circuit Breaker Rated Currency | A | 630 , 1250 , 1600 , 2000 , 2500 , 3150 , 4000 | ||||
| Switch Cabinet Rated Currency | A | 630 , 1250 , 1600 , 2000 , 2500 , 3150 , 4000 | ||||
| Rated Dynamic Stability Current(4s) | KA | 16 , 20 , 25 , 31.5 , 40 , 50 | ||||
| Rated Stability Current (Peak) | KA | 40 , 50 , 63 , 80 , 100 , 125 | ||||
| Rated Short-circuit Breaking Current | KA | 16 , 20 , 25 , 31.5 , 40 , 50 | ||||
| Rated Circuit Making Current (Peak) | KA | 40 , 50 , 63 , 80 , 100 , 125 | ||||
| Nominal Insulation Level | 1min Power Frequency Withstand Voltage | Between Poles,Between Pole and Ground | kV | 65 | ||
| Breakdown Voltage between Poles | kV | 79 | ||||
| Lightning lmpulse Withstand Voltage(Peak) | Between Poles,Between Pole and Ground | kV | 125 | |||
| Breakdown Voltage Between Poles | kV | 145 | ||||
| Level of Protection | The shell is lP4X,and the isolation chamber and circuit breaker room arelP2X when the door is open. | |||||
Note: The short-circuit capacity of the current transformer is considered separately.
Structural Features of Products
◇ Structure of the Switchgear (see Figure 1) .
◇ Fully metal armored, modular structure with a wide range of combination schemes.
◇ The cabinet body is made of imported aluminum-zinc coated thin steel plate, processed by machine tools, using advanced multiple folding techniques, connected with pull-riveted nuts and high-strength bolts, ensuring high precision, lightweight, high strength, and strong parts interchangeability.
◇ Compatible with VS1-24 series or imported VD4 series vacuum circuit breakers, offering wide applicability, high reliability, and long - term maintenance-free operation.
◇ The truck has operational and testing positions, with positioning and display devices at each location, ensuring safety and reliability.
◇ Various trucks change according to modular block design, ensuring that trucks of the same specification can be freely interchanged, while trucks of different specifications cannot enter.
◇ Grounding switch installation methods:
Installed in the middle of the cabinet (front-mounted) to facilitate maintenance from the back of the cabinet with dual-sided access. Installed at the back of the cabinet ( rear-mounted) to save space against the wall.
◇ Current transformer installation method:
Installed in the rear cable room of the cabinet.
Suspended from the bottom of the large bending plate.
◇ The cable room can accommodate up to 9 single-core cables.
◇ Each high-voltage chamber is equipped with a pressure relief channel to ensure personnel safety.
◇Highly reliable interlocking device that fully meets the "Five Prevention" safety requirements.
◇ The hand truck is transported by a dedicated transport vehicle, making operation easy and flexible.
◇ The front and back doors are equipped with observation windows, allowing for easy monitoring of the working status of the internal components.
◇ Highly reliable interlocking device that fully meets the "Five Prevention" safety requirements.
◇ The hand truck is transported by a dedicated transport vehicle, making operation easy and flexible.
◇ The front and back doors are equipped with observation windows, allowing for easy monitoring of the working status of the internal components.
External Dimensions of Switchgear
Product Features
◇ Main circuit schematic diagram number, purpose, and single line system diagram, Nominal Voltage, Rated Current, Rated Short- circuit Breaking Current, layout of the distribution room, and arrangement configuration diagram of the switchgear, etc.
◇ Requirements for control, measurement, and protection functions of the switchgear, as well as other interlocking and automatic device requirements.
◇ Model, specifications, and quantity of the main electrical components inside the switchgear.
◇ If bus bridges are needed to connect between switchgear or incoming cabinets, provide specific requirements such as the rated current capacity of the bus bridge, span, height from the ground, etc.
◇ If the switchgear is used in special environmental conditions, details should be specified at the time of ordering.
◇ Other special requirements.