Electric Explosion Protection 

Abstract: A signal collection system,adopted with DSP(Digital Signal Processing),effectively performs the signal processing and collecting in real time,considering the case of Ex motor set.The remote transmission and control is realized by selection of communication net system and communication CMOS chip.In conclusion,it is discussed of the explosion protection technique for signal collection system.

Abstract: Proposed a non-explosion assessing method for intrinsic safety circuit by numerical calculationUsing circuit simulation software Simplorer to simulate basic circuit,and regarding spark discharge as nonlinear time-varying resistance,we can calculate spark power,energy and other parametersThese parameters can regard as a standard of the intrinsic safety circuit evaluationSimulation result is accurate,and it is easy to promotion to complex circuitThis way can guidance intrinsic safety circuit design

Abstract: It introduces briefly on the composition of explosion protected special type supply unit and enumerates the technology index and key problems of this type supply unit,as well as the counter measures for achieve to these index.They are included the double-pole posts of the lead-acid accumulator,envelopment with acid-proof insulating material for top rail and underpart of the positive plates,sprinkling with plastic on the surface of the enclosure,added vent and weeping hole,to ensure the Ex safety of this supply unit.

Abstract: Based on the integral explosion protection concept for hazardous location in coal mine,it expounds an influence on the flameproof performance for flameproof electrical equipment used in coal mine where short circuit may occur by arc light.In order to settle this fault,relevant preventive measure is taken.In conclusion,some safety requirements for coal mine flameproof electrical products are brought forward.