bdz51-□防爆断路器(ⅱb)bdz51-□ explosion-proof circuit breaker (ⅱb)1.爆炸性气体环境危险场所：1区、2区；2. 可燃性气体、蒸气级别：ⅱa、ⅱb；3. 温度组别：t1~t4；4. 户内、户外(ip54)。1. for the dangerous sites with explosive airmixture: 1division、2 division;2. flammable gas, steam class：ⅱa、ⅱb;3.temperatures classification：t1~t6;4. indoor and outdoor(ip54).1.diecasted al-alloy shell with plastic-sprayed surface;2. insidemounted c45n、45ad、nm10、dz20 series circuit breaker;3. possessingthe guarding function against overloadandshort, etc;4. steelpipeand cable wiring.1. 铸铝合金外壳，表面喷塑；2. 内装c45n、c45ad、nm10、dz20 系列断路器；3.具有过载、短路等保护功能；4. 钢管或电缆布线。额定电压ratedvoltage (v)额定电流ratedcurrent(a)防爆标志explosion-proofingmarker防护等级protectioncategory防腐等级corrosion-proofinggrade进线口螺纹inlet"sthread电缆外径(mm)cable"s outsidediameter380/2201, 3,5, 10, 15, 20,25, 32,exdeⅱbt4exdⅱbt4ip54w, wf1,wf2g3/4φ10~φ15g1φ12~φ18额定电压ratedvoltage (v)额定电流ratedcurrent(a)防爆标志explosion-proofingmarker防护等级protectioncategory防腐等级corrosion-proofinggrade进线口螺纹inlet"sthread电缆外径(mm)cable"s outsidediameter380/2201, 3,5, 10, 15, 20,25, 32, 40, 50, 63exdeⅱbt4exdⅱbt4ip54w, wf1,wf2g3/4φ10~φ15g1φ12~φ18g11/4φ13~φ23g11/2φ17~φ26额定电压ratedvoltage(v)额定电流ratedcurrent (a)防爆标志explosion-proofingmarker防护等级protectioncategory防腐等级corrosion-proofinggrade进线口螺纹inlet"sthread电缆外径(mm)cable"s outsidediameter380/22016,20, 32, 40,50, 63, 80, 100exdeⅱbt4exdⅱbt4ip54w, wf1,wf2g1φ12~φ18g11/4φ15~φ22g11/2φ20~φ26g2φ27~φ371. 铸铝合金外壳，表面喷塑；2.内装nm1、dz20系列断路器；3. 具有过载、短路等保护功能；4. 钢管或电缆布线。1. diecasted al-alloyshell with plastic-sprayed surface;2. inside mounted or nm1, dz20series breaker3. possessing the guarding function against overloadandshort, etc;4. steelpipe and cable wiring.额定电压ratedvoltage(v)额定电流ratedcurrent (a)防爆标志explosion-proofingmarker防护等级protectioncategory防腐等级corrosion-proofinggrade进线口螺纹inlet"sthread电缆外径(mm)cable"s outsidediameter380100, 125,,225, 250exdeⅱbt4exdⅱbt4ip54w, wf1,wf2g2φ27~φ37g21/2φ36~φ44g3φ56