The basic knowledge of flameproof distribution boxes includes explosion-proof principles, explosion-proof zone classification, classification and grading of explosive gases, temperature classes, and ingress protection ratings, systematically introducing flameproof distribution boxes to everyone.。

Explosion-proof principle: Explosive substances, ignition sources, and air are the basic conditions for an explosion. If any one of these is absent, an explosion cannot occur. The purpose of explosion protection is achieved by isolating explosive substances from ignition sources.。

Explosion Hazardous AreaRegion

Explosion Hazardous AreaRegiondivided intoExplosive GasAreaRegion And Dust ExplosionPerformanceMixingOverallMineralAreaRegion，CountryDomesticexplosion-proofStandardaccording toExplosive Gaslocation的dangerousExtentDegreePlandivided into3ProductionAreaRegion， Namely Zone 0、Zone 1、Zone 2，Zone 0With And DustZone 20、Zone 21、Zone 22，Zone 0 And Zone 20Mostdangerous。

Zone 0: A place in which an explosive gas mixture is present continuously or for long periods under normal operating conditions.。

Zone 1: A place in which an explosive gas mixture is likely to occur under normal operating conditions.。

Zone 2: A place in which an explosive gas mixture is not likely to occur under normal operating conditions, and if it does occur, it will exist only for a short time.。

Zone 20: An area in which combustible dust forms a cloud in the air and is present continuously or frequently for long periods.。

Zone 21: An area in which combustible dust may occasionally form a cloud in the air under normal operating conditions.。

Zone 22: An area in which combustible dust does not normally form a cloud in the air, and if it does form, the duration is relatively short.。

Explosive GasclassificationClassLevel

inUseExplosion-proof distribution boxWhen，we Frequently Ability看AchieveNameplateSupremeWithIIA、IIB And IIC的identification， Namely Explosion-proof Rating，Explosive Gas的categoryDetermineStable了Explosion-proof distribution box的Explosion-proof Rating，IICForMosthigh-level，inSelectionWhen，according toon-siteGasSelectForShouldlevel的Explosion-proof distribution box。

IIA: Ethane, propane, styrene, benzene, toluene, ammonia, carbon monoxide, formaldehyde, aniline, butane, methanol, ethanol, propylene, diethyl ether, gasoline, trimethylamine, etc.。

IIB: Ethylene, coke oven gas, hydrogen sulfide, dimethyl ether, and ethyl ether, etc.。

IIC: Water gas, hydrogen, acetylene, carbon disulfide.。

Temperature Class

Due To Explosive GasGasPointInvincibleSame，Explosion-proof distribution box的TableAspectsPermitMostHigh TemperatureDegreedivided intoT1-T6，T6ForMosthigh-level，temperatureexceedExplosion-proof distribution boxTableAspectsPermit的MostHigh TemperatureDegree May TriggerRiseexplosion， So Criticalaccording toGasVariousVariousChooseForShouldTemperature Class的Explosion-proof distribution box。

T1: Ethane, propane, styrene, benzene, toluene, ammonia, carbon monoxide, formaldehyde, coke oven gas, water gas, hydrogen, etc.。

T2: Butane, methanol, ethanol, acetylene, propylene, vinyl chloride, etc.。

T3: Gasoline, hydrogen sulfide, ethyl chloride, octane, etc.。

T4: Diethyl ether, trimethylamine, diethyl ether, etc.。

T5:Carbon Disulfide。

T6: Ethyl nitrate, ethyl nitrite.。

Ingress Protection (IP) Rating

Ingress Protection (IP) RatingidentificationForIP, Namely "I"GenerationTableWaterproof And "P"GenerationTableDust-proof，Explosion-proof distribution box的Ingress Protection (IP) Rating Generally inIP54-IP68PositionArea，IndexDigitIncreasinglyGreater，Ingress Protection (IP) RatingIncreasinglyHigh。The ingress protection rating of dust explosion-proof distribution boxes shall be at least IP65.。