XL-21 Low Voltage Power Distribution Cabinet Switchgear
Product Description
XL-21 low voltage power distribution cabinet is suitable for power distribution in power plants and industrial and mining enterprises in three-phase four wire or three-phase five wire systems with AC voltage of 500 V and below. XL-21 low voltage power distribution cabinet is an indoor device installed against the wall and overhauled in front of the screen. The shell is made of steel plate, and the knife switch operating handle is located on the upper part of the right column in front of the box, which can be used for switching power supply. Circuit breakers of different models and current levels can be selected according to the needs of users to meet the needs of different users.
The device accords with standards IEC439-1 and GB7251.1.
Use Environmental Conditions
1) Ambient temperature:-50ºC ~+40ºC, and the average temperature within 24 hours shall not exceed+36ºC ;
2) Altitude: no more than 2000 m;
3) Relative humidity: not more than 50% when ambient air humidity is+40 ºC ; Under lower humidity, it can have higher relative
humidity (e.g.:+20ºC is 90%). Considering the change of temperature, it is allowed to produce moderate frost:
4) The inclination of the equipment to the vertical plane shall not exceed 5 during installation, and the equipment shall be installed
in a place free from severe vibration, impact and corrosion.
Product Parameters
| Rated work voltage |
380VAC/660VAC |
| Rated frequency |
50/60Hz |
| Rated short time withstand current |
50kA |
| Rated peak withstand current |
105kA |
| Dielectric strength |
2500V/1min |
| Rated insulation voltage |
660VAC |
| Protection grade |
IP30/40 |
| Dimention |
600(800,1000)×350(400,600)×1600(1800) |
Use, Maintenance and Overhaul
1) After the power distribution box is installed or overhauled, the following inspections and tests shall be carried out before it is put
into operation (the inspections and tests after overhaul depend on the quality of overhaul).
2) Check whether the electrical equipment and secondary wiring installed inside the power distribution cabinet meet the drawing
requirements.
3) Check whether the knife switch and air switch used for operation are flexible, and there should be no sticking and rolling pattern.
4) Check whether the electrical equipment installed has good contact and meets the use requirements of the electrical equipment
itself.
5) Check whether there are any other foreign matters in the power distribution cabinet and whether the strong screws in each part are loose.
Detailed Photos
Outline & Mounting Dimensions
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