XL-21 Power cabinet
XL-21 low-voltage power distribution box 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 a current voltage of 500 volts and below. XL-21 low-voltage power distribution box is an indoor device installed against the wall, and inspection and repair in front of the screen. The shell is made of steel plate. The knife switch operating handle is located on the upper right column of the box. It can be used as a power switch. According to user needs, different types of circuit breakers with different current levels can be selected to meet the needs of different users.
● The auxiliary circuit has the functions of local, remote, automatic control, and local and remote control switching. The contactor can use DC hold;
● The power-receiving main switch has an optional instantaneous tripping thermal-magnetic trip protection. In order to cooperate with the next-level main switch, the instantaneous protection is cancelled, avoiding over-level tripping, and has self-turning, manual operation and automatic switching Function;
● The main switch of the feeder circuit has instantaneous tripping and thermal-magnetic tripping protection. When the user requires it, leakage protection can be installed;
● The motor control circuit has instantaneous short circuit, overload, undervoltage release and phase failure protection;
● The receiving circuit is equipped with an ammeter and a voltmeter.