XL-21 power distribution cabinet
Short 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 tn-s systems with AC voltage of 500 volts or less. XL-21 type low voltage power distribution box is installed against the wall and overhauled in front of the screen.
Product details
Product overview
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 tn-s systems with AC voltage of 500 volts or less. XL-21 type low voltage power distribution box is installed against the wall and overhauled in front of the screen.
Design feature
XL-21 type low voltage power distribution cabinet is enclosed and its shell is made of bent steel plate. The knife switch operating handle is installed on the upper part of the right column in front of the cabinet and can be used for switching power supply. A voltmeter is installed in front of the distribution box to indicate the voltage of the bus. There is a door in front of the distribution box. After the door is opened, all equipment in the distribution box will be exposed for easy maintenance. This distribution box adopts domestic self-designed components, featuring compact structure,
convenient maintenance and flexible combination of circuit schemes. The distribution box is equipped with air switch and fuse as short-circuit protection, contactor and thermal relay. The front door of the box can be equipped with operation buttons and indicator lights.
Normal operating environment
◇ Ambient temperature: -50℃ ~+40℃ , and the average temperature within 24 hours shall not exceed+36℃ ;
◇ Altitude: no more than 2000 m;
◇ Relative humidity: not more than 50% when ambient air humidity is +40℃ ;
Under lower humidity, it can have higher relative humidity (e.g.: +20℃ is 90%). Considering the change of temperature, it is allowed to produce moderate frost:
◇ 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.
Use, maintenance and overhaul
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).
◇ Check whether the electrical equipment and secondary wiring installed inside the power distribution cabinet meet the drawing requirements.
◇ Check whether the knife switch and air switch used for operation are flexible, and there should be no sticking and rolling pattern.
◇ Check whether the electrical equipment installed has good contact and meets the use requirements of the electrical equipment itself.
◇ Check whether there are any other foreign matters in the power distribution cabinet and whether the strong screws in each part are loose.
