自锁型继电器在隔爆电源产品中的应用

utomatic control system is widely used in an explosive environment，leading to the demand for back-up power system of explosion proof. And the construction of coal mine emergency system also put forward the demand of large-capacity long-delay back-up power. In the relevant national standards and industry standards of explosion proof,requesting the battery pack and battery management unit in the explosion-proof power supply should be cut before removed cover .To slove this problem,the circuit based on the self-locking relay ,using one key to achieve instaneous cutting of the battery pack and battery management unit, greatly improving the control efficiency and power safety.The circuit has been tested in products of the explosion-proof power supply,easily controlling,high reliabilty,low consumption.