1.1 Scope of application
The KHJ15/18 mine-used intrinsically safe two-way emergency stop lock switch (hereinafter referred to as the lock switch) is suitable for underground coal mines and in explosive environments with methane and coal dust. It is especially suitable for the control and protection of equipment such as mining area and belt transportation, and can also be used in other similar places.
1.2 Use environment
1.2.1 The lockout switch should be able to work normally under the following environmental conditions:
     a) Ambient temperature: 0℃～＋40℃;
     b) Average relative humidity: not more than 95% (+25℃);
     c) Atmospheric pressure: 80kPa～106kPa;
     d) Where there is no significant vibration and impact;
e) There is an explosive mixture of methane and coal dust in the coal mine, but there is no mixture of corrosive gases that damage the insulation.

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