There are basic concepts, and there are moderately difficult concepts. With regard to phase rotation, it may belong in the latter, though there are some individuals who claim it’s a relatively simple idea to begin with. Mechanical engineers would know how this actually works. Phase rotation occurs when 3 phases from a 3 phase supply is taken and connected to a motor, which would then run in a clockwise manner. When the motor is turned off, 2 phases can be changed over, which will then lead to a counter clockwise motion.
This is something which occurs mainly in motorized equipment such as transformers and batteries found in large factories. However, it is very important for one to realize that, despite changes in the wiring, the phase rotation would remain the same. However, there may be some unforeseen circumstances which can lead to disastrous results. Take for instance; with improper phasing, a crane that was intended to go up actually comes down, and below it are a bunch of unknowing construction workers who don’t realize that they’re about to head to the hospital with barely a limb in place.
It is because of situations like this that phase rotation meters were created. In fact, these devices are known to test if the phasing is clockwise or counter clockwise. There are a variety of meters to be found, yet all serve the same purpose. These devices are equipped with lights which can help a person determine if there is power being supplied, and a lamp which can indicate which ever direction the motor rotation is moving. This proves to be useful for large machinery. There are many kinds of phase rotation meters to be found, as stated before, and below are just a few of them.
- There are bench top phase meters which are meant to be placed on top a table or, obviously, a bench. These are considered to be free standing units which are totally encased, coming with a cabinet as well as an integral interface which makes it easy for operators to use them.
- Phase meters may also come in the form of clamp meters. These are used when someone wishes to check the current passing through wires of certain machinery, as the meter itself is attached to a live circuit. There are numerous models out there, from various manufacturers, so it is highly important for an individual to actually find a good brand, especially when working with live circuits can be a rather risky matter.
- Racks mounted meters are also available for use on machinery. These are electrical equipment which is designed to be mounted on top of telecommunications racks. They feature hardware like flanges, tabs and rail guides.
These are just three types of phase rotation meters. Granted that there are more, and all of them serve the purpose of ensuring that phasing is correct and will not cause any problems when operating certain types of machines and heavy duty equipment.
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