Under the prescribed conditions, in the normal working or prescribed state of failure, the electric sparks and thermal effects generated cannot ignite the circuit of the explosive mixture. The standard of this type of equipment is GB3836.4 —— 83 "Explosive Environmental Evolution Electric Electric Electric Electric Electric Electric Equipment -Essential Safety Circuit and Electric Equipment".
Positive voltage electrical equipment: Electric equipment with positive pressure shells is called positive pressure electrical equipment. The so -called positive pressure shell refers to the pressure of internal protective gases in the shell, which is higher than the pressure of the internal protective gases than the surrounding explosive environment. To prevent the external explosive mixture from entering the shell inside the shell. The standard of this type of equipment is GB3836.5 — 87 "Explosion Electric Electric Equipment for Explosive Environment -Positive Voltage Electric Equipment".
Oil -filled electrical equipment: The electrical equipment that does not see or may not see or produce some components that may produce electric sparks or overheating, so that the electrical equipment of the explosive mixture above the fuel surface or the explosive mixture outside the shell is called the oil -filled electrical equipment. The standard of this type of equipment is GB3836.8 — 87 "Explosive Environmental Explosion -proof Electric Electric Electric Electric Equipment".
Sand -type electrical equipment: filled with sand granular materials inside the shell, so that the arc generated by the shell under the specified conditions, the overheating temperature on the surface of the disseminated flame, shell wall, or the surface of the sand grain material cannot ignite the electrical equipment of the explosive mixture around the type of equipment. Called sand -shaped electrical equipment. The standard of this type of equipment is GB3836.7 — 87 "Explosive Environmental Explosion -proof Electric Electric Electric Electric Electric Equipment".
Sparkless electrical equipment: Under normal operating conditions, the surrounding explosive mixture will not be ignited, and electrical equipment that generally does not ignite the fault is generally not a sparkless electrical equipment. No spark -free electrical equipment should take measures when designing and manufacturing, so that the equipment does not produce arcs, sparks, or hazardous temperatures that have ignited effects during normal operation, and in general Essence The standard of this type of electrical equipment is GB3836.8 — 87 "Explosive Environmental Explosion -proof electrical equipment -no spark -free electrical equipment".
Seal -type electrical equipment: The entire device or part of it may produce arcs, sparks or high -temperature parts of an explosive mixture in the sealing agent. Electric equipment of explosive mixture. The standard for this type of electrical equipment is GB3836.9-90 "Explosive Environmental Electric Electric Electric Electric Electric Electric Equipment".
Qi -dense electrical equipment: electrical equipment with air density shell. The shell is sealed by melting, squeezing, or adhesive method to prevent the gas outside the shell from entering the shell and separate it from the ignition source. The standard of this type of equipment is GB3836.10-90 "Explosive Environmental Explosion -proof Electric Electric Electric Electric Electric Equipment".
Special electrical equipment: Anyone who does not belong to the above -mentioned basic explosion -proof type, or the above basic explosion -proof type combination, and other special measures have been fully tested and indeed proved that electrical equipment with the ability to prevent explosive gas mixture is called special types. Electrical Equipment. This type of equipment must be passed by the inspection unit designated by the national authority, and it should also be reported to the National Standard Agency for record.
Dust explosion -proof electrical equipment: Designed and manufactured in accordance with the prescribed conditions, so that its shell can prevent the amount of flammable dust from entering or entering the amount of equipment, which will not hinder the safe operation of the equipment. Electric equipment. The standard of this type of equipment is GB1276.1-90 "Explosive Dust Environmental Explosion Electric Electric Electric Electric Electric Electric Equipment".
There are many explosion -proof types of explosion -proof electric gourds, but the commonly used in the market is generally "explosion -barrier" explosion -proof electric gourd, which represents the product of the BCD explosion -proof steel wire rope electric gourd.
