Wednesday, June 19, 2019

Useful Information Regarding Insulation Tester

By Barbara Morgan


In a perfect world, current that is sent along a conductive wire is supposed to reach the intended destination in full. However, this does not happen in the real world because some of the current is usually lost along the way. There are different reasons why the current gets lost along the way. In an attempt to prevent the loss of current, resistant sheathing is used to insulate conductive wires. Here are facts regarding Insulation tester.

In some cases, current is allowed to escape and get lost due to imperfection in the material used to insulate conductors. When this happens, a lot of harm is done to electrical circuits and machinery. For safety purposes, routine testing can help in determining if the insulation is performing well. Problems can be identified through routine tests before equipment failure or injury happens.

A cladding tester is the piece of equipment that is used to accomplish the testing. The equipment works by measuring the resistance of the cladding to flow of current. This indicates the integrity of the cladding in turn. Cladding that is of high quality allows very little current to escape through it. However, low-quality cladding allow huge amounts of current to escape through.

When measuring the quality of material used to make the sheath, different kinds of current are tested. Absorption, leakage and capacitive currents are the three main types of current tested. The current that occurs immediately when voltage is applied to conductors is referred to as capacitive current.

Capacitive current is the same as the first burst of water that flows out of a hose when the tap is first opened. The flow of water is usually very high initially, but it rapidly drops as the hose becomes fully filled with water. In this case, it is the conductor becoming fully charged that leads to the drop in the current flow.

Absorption current starts out very high and drops just in the same way capacitive current does. However, what differentiates the two kinds of current is the fact that absorption current drops much slowly. The storage of potential energy within the cladding is responsible for the gradual drop in absorption current. In cladding testing using time resistance method, absorption current is a very important part.

Leakage current is also referred to as conduction current. This is a small, steady current that is present both over and through the cladding. If the leakage current increases over time, it implies that the cladding is deteriorating over time too. Insulation test meter usually indicates these increase in leakage current as decrease in resistance.

There is a wide range of cladding testers in the market today. The various models of these products are made by manufacturers located in various countries. The quality of individual testers depends on the manufacturer of the equipment. Also, the various models of these devices in the market are used in different applications. There are testers that are meant for residential testing and those that are meant to be used in industries.




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