![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
1.1 Division of Explosive Atmospheric Environment Hazardous Areas Zone 0: An environment in which explosive gas mixtures occur continuously or over a long period of time.
Zone 1: The environment in which explosive gas mixtures may occur during normal operation.
Zone 2: The environment in which explosive gas mixtures cannot occur during normal operation or the presence of explosive gas mixtures only for a short period of time.
Zone 0 generally exists only in closed containers, internal tanks and other gas spaces. In the actual design process, Zone 1 is rarely present. Most of the situations are in Zone 2.
1.2, explosion-proof electrical equipment is divided into two categories:
Category I electrical equipment for underground mines Class II electrical equipment used in places other than mines Classes 1.3 and II are classified into IIA, IIB and IIC according to the maximum test safety clearance or minimum ignition current ratio applicable to explosive gas mixtures. Category; According to its maximum surface temperature is divided into six groups T1 ~ T6.
1.4. Explosive gas mixtures are grouped by ignition temperature
2. Terminology 2.1 Flameproof electrical equipment has electrical equipment capable of withstanding the explosion pressure of the internal explosive gas mixture and preventing internal explosions from propagating to the explosive mixture around the enclosure. The symbol is “dâ€.
2.2. The safety-enhanced electrical equipment will not generate arcs, sparks or high temperatures that may ignite the explosive mixture under normal operating conditions. Measures are taken to improve the safety margin in order to avoid arcing, sparks or arcing under normal and recognized overload conditions. High-humidity electrical equipment with the symbol "e".
3. Explosion-proof electrical equipment ignition principle <br> <br> combustible gas mixture for two reasons: a spark is generated by the electrical equipment, electric arc, the other surface of the electrical equipment (i.e., surface in contact with the combustible gas mixture )fever. For components that can generate arcs and sparks during normal operation, they can be placed in flameproof enclosures, or other explosion-proof types such as encapsulated, sand-filled, oil-filled, or positive-pressure types can be used to achieve explosion-proof purposes. For the safety-enhanced electrical equipment, it is a device that will not generate arcs, sparks, and dangerous high temperatures during normal operation. If some protection measures are taken in its structure, it will try its best not to make the equipment under normal operation or under an approved overload condition. Arc, spark, and overheating can further increase the safety and reliability of the equipment. Therefore, this device has no ignition source during normal operation and can be used in explosion hazardous environments.
4. Example of explosion-proof signs 4.1. If the electrical equipment is type IIB flameproof type T3, the mark is ExdIIBT3.
4.2. If the electrical equipment is of type II increased safety, the temperature group is T2 and the mark is ExeIIT2.
4.3. If more than one type of electrical equipment is used, the main type of explosion protection shall be marked first, followed by other types of explosion protection. For example, the main body shall be increased safety type IIC type explosion-proof components, the temperature group shall be T4, and the symbol shall be ExedIICT4. .
4.4 If the electrical equipment is dust explosion-proof and dustproof T11 group. The sign is: DIPDPT11 good lighting, gold medal made.
Zone 1: The environment in which explosive gas mixtures may occur during normal operation.
Zone 2: The environment in which explosive gas mixtures cannot occur during normal operation or the presence of explosive gas mixtures only for a short period of time.
Zone 0 generally exists only in closed containers, internal tanks and other gas spaces. In the actual design process, Zone 1 is rarely present. Most of the situations are in Zone 2.
1.2, explosion-proof electrical equipment is divided into two categories:
Category I electrical equipment for underground mines Class II electrical equipment used in places other than mines Classes 1.3 and II are classified into IIA, IIB and IIC according to the maximum test safety clearance or minimum ignition current ratio applicable to explosive gas mixtures. Category; According to its maximum surface temperature is divided into six groups T1 ~ T6.
1.4. Explosive gas mixtures are grouped by ignition temperature
2. Terminology 2.1 Flameproof electrical equipment has electrical equipment capable of withstanding the explosion pressure of the internal explosive gas mixture and preventing internal explosions from propagating to the explosive mixture around the enclosure. The symbol is “dâ€.
2.2. The safety-enhanced electrical equipment will not generate arcs, sparks or high temperatures that may ignite the explosive mixture under normal operating conditions. Measures are taken to improve the safety margin in order to avoid arcing, sparks or arcing under normal and recognized overload conditions. High-humidity electrical equipment with the symbol "e".
3. Explosion-proof electrical equipment ignition principle <br> <br> combustible gas mixture for two reasons: a spark is generated by the electrical equipment, electric arc, the other surface of the electrical equipment (i.e., surface in contact with the combustible gas mixture )fever. For components that can generate arcs and sparks during normal operation, they can be placed in flameproof enclosures, or other explosion-proof types such as encapsulated, sand-filled, oil-filled, or positive-pressure types can be used to achieve explosion-proof purposes. For the safety-enhanced electrical equipment, it is a device that will not generate arcs, sparks, and dangerous high temperatures during normal operation. If some protection measures are taken in its structure, it will try its best not to make the equipment under normal operation or under an approved overload condition. Arc, spark, and overheating can further increase the safety and reliability of the equipment. Therefore, this device has no ignition source during normal operation and can be used in explosion hazardous environments.
4. Example of explosion-proof signs 4.1. If the electrical equipment is type IIB flameproof type T3, the mark is ExdIIBT3.
4.2. If the electrical equipment is of type II increased safety, the temperature group is T2 and the mark is ExeIIT2.
4.3. If more than one type of electrical equipment is used, the main type of explosion protection shall be marked first, followed by other types of explosion protection. For example, the main body shall be increased safety type IIC type explosion-proof components, the temperature group shall be T4, and the symbol shall be ExedIICT4. .
4.4 If the electrical equipment is dust explosion-proof and dustproof T11 group. The sign is: DIPDPT11 good lighting, gold medal made.
Steam Room
Steam Room,home steam room,outdoor steam room,garden steam room,hot steam bath
Guangzhou Aijingsi Sanitary Products Co.,Ltd , https://www.infinityedgehottub.com