What isExplosion-proof electrical equipment？

The professional definition of explosion-proof electrical equipment refers to electrical equipment designed and manufactured according to specified conditions (explosion protection types) that will not cause the surrounding explosive mixture (explosive hazardous place) to explode.。In short, it refers to electrical equipment used in explosive atmospheres.。

The so-called equipment used in explosive atmospheres refers to the general term for electrical explosion-proof equipment and non-electrical explosion-proof equipment used alone or in combination in explosive atmospheres that can prevent explosion caused by their own potential ignition sources.。

What are the categories of explosion-proof electrical equipment?？

According to the applicable explosive atmospheres, they are divided into Class I, Class II, and Class III.。That is, the categories of explosion-proof electrical equipment are divided into: Class I: electrical equipment for coal mines, mining explosion-proof; Class II: electrical equipment for other explosive gas atmospheres except coal mines, gas plant explosion-proof; Class III: electrical equipment for explosive dust atmospheres except coal mines, dust plant explosion-proof.。

Class II equipment categories are further divided into: IIA level: propane, natural gas, etc.; IIB level: ethylene, ethanol, etc.; IIC level: hydrogen, acetylene, etc.。

Class III equipment categories are further divided into: IIIA level: combustible flyings (such as rayon, cotton, hemp floc, etc.); IIIB level: non-conductive dust (ρ>1kΩ·m); IIIC level: conductive dust (ρ≤1kΩ·m).。

What is Equipment Protection Level (EPL)？

The level of protection for equipment based on the likelihood of the equipment becoming an ignition source and the different characteristics of explosive gas atmospheres, explosive dust atmospheres, and methane explosive atmospheres in coal mines。

equipmentProtectionlevelEPL-Gas :

Ga:Explosive GasEnvironmentUsersequipment，have"VeryHigh"的Protectionlevel，innormaloperation、OutputOn-site的BudgetRegularfault Or 罕见faultNextInvincibleIsPointGasSource。

Gb: Equipment for explosive gas atmospheres, with a "high" level of protection, which is not an ignition source under normal operation or expected fault conditions。

Gc: Equipment for explosive gas atmospheres, with a "general" level of protection, which is not an ignition source during normal operation, and may also adopt additional protective measures to ensure that no effective ignition occurs when ignition sources are expected to appear frequently (e.g., faults in lighting fixtures)。

equipmentProtectionlevelEPL-Dust:

Da:Explosive DustEnvironmentUsersequipment，have"VeryHigh"的Protectionlevel，innormaloperation、OutputOn-site的BudgetRegularfault Or 罕见faultNextInvincibleIsPointGasSource。

Db: Equipment for explosive dust atmospheres, with a "high" level of protection, which is not an ignition source under normal operation or expected fault conditions。

Dc: Equipment for explosive dust atmospheres, with a "general" level of protection, which is not an ignition source during normal operation, and may also adopt additional protective measures to ensure that no effective ignition occurs when ignition sources are expected to appear frequently (e.g., faults in lighting fixtures)。

What is the classification of explosive atmosphere usage areas for electrical equipment？

For gas usage areas: divided into Zone 0, Zone 1, and Zone 2。

Zone 0:Explosive GasEnvironmentContinuityOutputOn-site Or LongTimeStorein的location；

Zone 1:innormaloperationWhen， May OutputOn-siteExplosive GasEnvironment的location；

Zone 2:innormaloperationWhen，Invincible May OutputOn-siteExplosive GasEnvironment， If OutputOn-siteAlsoIs偶尔occur And MerelyIsShortTimeStorein的location。

For dust usage areas: divided into Zone 20, Zone 21, and Zone 22。

Zone 20:WithAerospaceStationInCombustible DustCloudcontinuous Or LongRegular Or FrequencyFrequentShortWhenStoreinInExplosive DustEnvironmentIn的location；

Zone 21:innormaloperationWhen，Very May 偶howeverWithAerospaceStationInCombustible DustCloudformStoreinInExplosive DustEnvironmentIn的location；

Zone 22:innormaloperationWhen，InvincibleEther May WithAerospaceStationInCombustible DustCloudformStoreinInExplosive DustEnvironmentIn的location， If StoreinMerelyIsShortShort的。

WithSupremeThenIsWhat is explosion-proof electrical equipment? What is Equipment Protection Level (EPL)?For more related information, please visit Hualong Explosion-Proof at www.hlfbdq.com。