What do you mean by "MB" in the EXdembIICT4 above the explosion-proof lamp?
Not MB. It should be em. EXdembIICT4 it means that this explosion-proof lamp comes with an explosion proof ballast, and its model is EXd EM bIICT4. Without this sign, no explosion proof ballast shall be included.For reference yo.
Explosion-proof structure, it should be cast sealing structure, the general coil type, such as solenoid valve, coil, etc., are such pouring sealing structure.
MB refers to the sealing structure. D: flameproof type; E: increased safety type; MB: cast sealing type. This kind of mark shows that this product is a composite explosion-proof product, that is, the combination of the above three explosion-proof methods. Add it, lest the above two are suspected to be a typo: rubber sealing structure has been the new standards, namely: Ma, MB, MC, Ma can be used in zone 0. This MB is equivalent to IB in the structure, the correct answer is not recommended, recommend a suspected people wrong wrong answers, this level!
Explosion proof signs Exdemb, II, B, T6, Gb, demb, meaning are as follows:Code name, explosion proof type, national standard, explosion prevention measures, applicable areaD flameproof GB3836.2 isolation exists for ignition source Zone1, Zone2E increased safety type GB3836.3 tries to prevent ignition source Zone1, Zone2MB cast sealed GB3836.9 try to prevent ignition source Zone1, Zone2
