Focusing on a new method of protection is the increase transducer input of an air switch,air pressure-sensitive switch on the parallel resistance(400 V voltage varistor 865 kΩ optional) when there are high-voltage varistor time will be short-circuit air trip switch quickly to protect the inverter,the inverter greatly reduce the failure rate the scientific and practical results are obvious.

Investigation of difference between protection standard and fact of switch;

Research on 3D CAD system of electric switches;

Optimizing design of sub-nanosecond gas switch with adjustable gap

Breakdown characteristics of gas switch under nanosecond pulse voltage

Operating characteristics of subnanosecond gas switch

For maintenance convenience,many electric switches for mine are adopted pinboard construction in order to reduce effect of coal mine production.