Explosion-proof lamps should be checked before installation: explosion-proof type, category, level, group, protection level of the shell, installation method and fastener requirements for installation, etc. The installation of explosion-proof lamps should ensure that they are firmly fixed, the fastened bolts cannot be replaced at will, and the spring washers should be complete. The dustproof and waterproof sealing ring should be kept as it is when installed. At the cable entry, the cable and the sealing gasket should be closely matched, the section of the cable should be round, and the surface of the sheath should not have defects such as unevenness. The excess wire inlet must be blocked according to the explosion-proof type, and the compression nut must be tightened to seal the wire inlet.
In the daily maintenance, you need to pay attention to the following points:
Explosion-proof lamps and lampshades should be able to automatically cut off the power before opening. However, because the interlocking device is more complicated and difficult to achieve, most lamps only have warning signs marked with the words "Forbidden to open with electricity" on the outer casing. And because the surface temperature of the bulb is still very high after the power is turned off, if the lampshade is opened immediately, there is still the danger of igniting the explosive gas mixture (mainly referring to the flameproof structure). , and can quickly open the cover of the lamp should pay attention to this. The CeY-1 type explosion-proof fluorescent lamp has an interlock mechanism for opening the cover and power off, which provides convenience and safety guarantee for the maintenance work. Because the fluorescent lamp is a cold light source lamp, there is no high temperature on the surface, and the cover can be opened immediately after the power is turned off.
When replacing bulbs (tubes), the explosion-proof joint surface of explosion-proof lamps should be properly protected and not damaged; the cleaned explosion-proof surface should be coated with phosphating paste or 204-1 anti-rust oil, and other paints are strictly prohibited; There should be no rust layer on the surface. If there is slight rust, there should be no pockmarked surface after cleaning. The sealing ring used for dustproof and waterproof must be kept intact, which is very important for the increased safety lamps. If the sealing ring is seriously damaged, replace it with a sealing ring of the same specification and material, and replace the entire lamp if necessary. When overhauling, pay attention to whether the lampshade is in good condition. If it is broken, it needs to be replaced immediately.
Portable lamps are divided into two types: powered by the feeder network and self-contained power. For lamps powered by the feeder network, a rubber sheathed cable should be used from the explosion-proof junction box (box) or explosion-proof plug to the lamp, and its grounding or neutral core should be in the same sheath; YC, YCW heavy-duty rubber sheathed cables of 25 square millimeters.
