General Requirements For Safety Performance Of Miner's Lamp

- Aug 07, 2020-

The standard of "General Requirements for Miner's Lamp Safety Performance (GB 7957-2003)" replaces GB 7957-1987 "Mining Helmet Lamp". Compared with GB 7957-1987, the main changes are as follows:

Increased the limits of rated voltage, rated current and rated power;

Increased the requirements and test methods for the surface resistance of the plastic enclosure;

Modified the requirements of lamp cap structure;

Increased the requirements and test methods of lamp cap intensity;

Modified the impact resistance of the battery tank;

Deleted battery capacity requirements and test methods;

Deleted the illumination requirements and test methods;

Increase the battery strength requirements and test methods;

The requirements and test methods for the electrical conductivity of cables have been added;

The requirements and test methods for fatty acid resistance of cable sheaths have been added.