Power load classification of mine power supply system

Class I load Any load that may cause personal injury or death, damage to important equipment or heavy loss of production due to sudden power failure is a class I load. Such as main ventilator, vertical shaft hoist for lifting personnel, underground main drainage pump, regional ventilator in high gas mine, gas pump and auxiliary equipment of the above equipment, etc. A class of load must have a reliable standby power supply, which is usually supplied by an independent double circuit from the substation.

Class II load A load that may cause greater economic losses due to sudden power failure is a class II load. Most production equipment is Class II load, such as main hoist, air compressor and underground substation without Class I load. For the second-class load of large mines, the power supply mode with standby power supply is generally adopted.

All loads that do not belong to Grade I and Grade II belong to Grade III load. Such as production auxiliary equipment, family area, office building, machine repair workshop, etc. There is no requirement for the reliability of power supply for three types of loads, and one line can be used to supply power to multiple loads, reducing equipment investment.