May 20, 2023
It is said that no matter what type of work has been done for a long time, practitioners usually summarize some emergency and practical little experience and skills. Master Li, who has worked as a maintenance electrician for almost a decade, also learned some small emergency skills.
For lighting fixtures such as incandescent lamps and fluorescent energy-saving lamps with damaged housings, it is very inconvenient to remove them with bare hands or needle-nosed pliers, since many broken glass housings remain outside the lamp bases. At this time, you can prepare potatoes or radishes, insert them into broken glass, and then they will easily unscrew.
When overhauling gas and smoke sensors, it is dangerous and uneconomical to use standard calibration of toxic and harmful gases. At this time, a lit cigarette can easily help you pass test.
In our work as electricians, we often encounter belt drive devices. When a belt is worn or high temperatures in summer cause belt to fit too loosely and “slip” occurs, we can use fabric-based electrical tape to wind belt . belt in an emergency.Emergency use so as not to delay normal production work.
During maintenance work, when diameter of motor rotor shaft wears and decreases, if wear rate is relatively small, you can use epoxy resin to thicken worn part, and after resin hardens, it is polished. to normal size. Can be used temporarily.
If conditions do not allow, if you want to protect a three-phase balanced power line from leakage / phase failure, you can pass cable through a feed-through current transformer (currently transformer is converted to a zero-sequence current transformer), using characteristics according to which three-phase electrical vector sum is no longer zero when a leakage/loss of phase error occurs, to signal faults for protection monitoring.
After using multimeter for a long time, copper foil under gear selector switch will be severely worn, which will at least affect accuracy of measurement, and make multimeter completely unusable. Currently, we can fix this kind of failure by adding tin with a soldering iron to worn copper foil.
In emergencies, such as lack of spare parts, we can use road switches (such as YBLX-19 and other models) to temporarily replace damaged buttons, and of course vice versa.