So many years have often been asked: You this led explosion-proof light is not waterproof, ah, can open the use of the answer is of course, but this waterproof is not completely on the water, is to prevent rain erosion.
Then the problem came. Some people said that the explosion-proof is sealed. Can a sealed lamp be called an explosion-proof lamp?
Let's LED explosion-proof lights can be done IP66, IP66 that is completely waterproof, the basic equivalent of completely sealed, then the seal is waterproof, then the explosion-proof LED lights will lose the effect of explosion-proof.
Then Xiao Bian tells you why the LED explosion-proof light can not be sealed completely:
Everyone knows that explosion-proof lighting fixtures are generally installed in flammable and explosive environments. These places may be filled with flammable and explosive gases. These gases enter the lamps. It is inevitable that the lamps will generate arcs when they work. When the arc ignites these gases, these gases will explode inside the luminaire. Then we completely seal the luminaire.
The internal pressure of the lamp cannot be released. When the internal pressure or explosive force reaches a certain level, it will break the lamp housing and cause the external environment to explode. This result is serious. Therefore, our LED explosion-proof lamp design has a flameproof surface. The surface is used to reduce the pressure generated by the internal explosion. When these internal arcs and Firefox pass through the flameproof surface, they will gradually weaken.
In this way, the explosion-proof effect can be truly achieved, so the explosion-proof lamps and lanterns are completely sealed and the practice is wrong.
According to different waterproof performance, determine different test requirements.
Generally we say that the waterproof requirement is IP65-IP68. Below I briefly introduce the meaning of the protection level numbers.
IP65 6 refers to no dust ingress, 5 refers to spraying water in all directions without harmful effects.
The 6 in front of the IP66 refers to no dust entry, and the back 6 refers to strong water spray in all directions of the housing without harmful effects.
IP67 6 refers to no dust entry, 7 refers to the water immersed in the specified pressure, after a specified time the amount of water into the enclosure will not be harmful.
IP68 6 refers to no dust entry, 8 refers to the condition that the manufacturer and the user agree on each other (should be more severe than the characteristic number 7). Continued dive after the dive will not be harmful.
All of our lamps and lanterns are IP66 rated. When installed properly, it is completely outdoor. When it rains, it does not matter whether it is light rain, moderate rain or heavy rain.
We must understand that explosion-proof and waterproof are two different concepts, and some bad manufacturers sell waterproof led lamps as explosion-proof led lamps. Waterproof led lamps belong to ordinary lighting and other equipment. They cannot be compared with led explosion-proof equipment.
Therefore, explosion-proof and waterproof are two concepts, what kind of explosion-proof form, protection grade lamps. The user must make it clear and ask as a manufacturer.
Each winch has 2 separate brake systems, a disc brake on the transmission input (service brake) and a disc brake directly on the drum (parking brake). The position of the cable drum is determined by means of an absolute encoder and checked by a gear limit switch with 4 switching elements. For a precise measurement of the tensile force, a measuring system with 2 load cells is available. Due to the special suspension of the winch frame, only the tensile force is transmitted to the load cells. The sum of the two measured forces gives the pulling force on the rope. The torque determined by the inverter checks this measuring system. The measured tensile force is primarily used to control the automatic cycle. When unwinding, the system is also used to leave a certain minimum pulling force on the ropes.
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