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 500V and below. XL-21 low-voltage power distribution cabinet is an indoor device installed against the wall, and it is inspected in front of the screen. The shell is made of bent steel plate, which can be used as a switching power source. According to the needs of users, circuit breakers of different types and current levels can be selected to meet the needs of different users

 

Features
 

The main electrical properties fully comply with the provisions of IEC60439-I: 1992 and GB7251.1-1997:

The auxiliary circuit has the functions of local, remote, automatic control and local and remote control switching, and the contactor can be held by DC;

The power-receiving main switch has the optional instantaneous tripping and thermal-magnetic tripping protection. In order to cooperate with the next-level main switch, the instantaneous protection is canceled, avoiding the leapfrog tripping, and has the functions of automatic switching, manual operation and automatic switching;

The main switch of the feeder circuit has instantaneous tripping and thermal-magnetic tripping protection, and leakage protection can be added when the user requires;

The motor control circuit has short-circuit instantaneous, overload, under-voltage release and phase-break protection;

The power receiving circuit is equipped with an ammeter and a voltmeter.

Conditions of Use
 

1. Installation location: Indoor:

2. Altitude: ≤2000m:

3. Ambient temperature: -25. C～+45 °c, maximum temperature difference ≤25 °c:

4. Relative humidity: daily average ≤ 95%, monthly average ≤ 90%:

5. Earthquake resistance: Ⅷ degree, horizontal acceleration ≤ 0.25m/S², vertical acceleration ≤ 0.125m/S²:

6. Places without severe vibration and shock and without fire, chemical corrosion, and explosion hazards.

 

technical parameter