Abstract
At present, the safety of explosion-proof protective device can't meet the need of the development of coal industry.The problems mainly display that the flameproof machine is easy to lead to the electric spark explosion which large current cause and is easily affected by underground distractions. The article puts forward a kind of intrinsically safe explosion-proof device which use related functions to eliminate interference. the device regard T I company production of ultra low power 16-bit MSP430F149 MCU as the core device which can automatically in real time detection of the leakage, overload, short circuit, over/under voltage, phase and other power grid fault and trip alarm.
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