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Using a Reverse Plugging Speed Control

Crane Accidents

Imagine walking past a construction site were crane is lifting a heavy load. You notice that the crane is not hoisting the load in a reasonably controlled fashion. It would seem that the load is swaying back and forth erratically. The reason for this is that the speed of the lift is recklessly out of control.

Hopefully, the above imagined scenario remains exactly that...imagined. Speed must always be tempered with judgment and control or else a construction site can become a very hazardous environment. Unfortunately, some methods utilized to control speed are not always as safe as we initially assume. The reverse plugging speed control method, for example, is often employed but it is not always the best way to achieve the desired result.

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When we pass a crane at a construction site, we have a tendency to look at it as a whole entity and not as a machine composed of a variety of small complex parts. While this is understandable because the average person is not a mechanical engineer, it is also a somewhat dismissive attitude because we do not acknowledge the various complex parts to create the whole. This is unfortunate because the small parts are what make the primary function of the crane possible. Also, it is these parts that make the safe operation of the crane possible as well.

Obviously, the motor of the hoist is the most important aspect of a crane. It is the motor that allows the pulleys and ropes to perform their task. As previously mentioned, when the speed of the up and down hoisting is out of control, safety is undermined. This is why a plugging speed control is often employed. Found in certain motors, this is a multi-speed method designed to speed up or reduce acceleration as needed. One of the ways this is achieved is by limiting the amount of energy to the motors. By reducing energy and voltage to the motors, the assent and descent of the hoist can be controlled.

However, the reverse plugging method does not always work effectively. There are a number of reasons for this. One reason is that these types of motors are not truly compatible with the more compact cranes that are being produced. Then, this is also the problem of neglect in the maintenance of a speed controlled motor. Operational malfeasance can sometimes be a factor as well. After all, if the speed control is not effectively utilized then its presence might as well be worthless.

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As such, it would be advisable that any construction site that employs the use of a crane with a reverse plugging speed system think about this decision a little bit. If there are concerns and red flags raised about the confidence of using such a system, a construction site would be best served thinking about whether or not such a selection is a wise one. If there is worry about such systems, it is because such a problem exists. Therefore, it is always best to take as many precautions as possible. If you have been injured contact a crane accident lawyer today.

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