How to choose the right insulation tester?

What is insulation testing?

In an ideal situation the electrical current which is passing along a conductive wire should directly reach its final destination, but in reality some of this current is lost on the way for a myriad of reasons. Wires are usually insulated with resistant sheathing to ensure maximum conductivity, however still certain amount of current is still lost, which not good for the machinery and is also a major safety hazard. That is why insulation testers are important, as the routine tests can help you identify the problems before any equipment failure arises.

But with so many insulation resistance tester models in the market, how do you choose the right one? To answer this integral question, one must consider the following important factors:

Voltage Range: Voltage selection is almost always the first determination to be made when selecting an insulation tester. Insulation testers are high-voltage dc instruments. High voltage is necessary in order to pull enough current (commonly referred to as “leakage”) to be measurable, and even this is typically on an nA level. If testing is to be done on a wide range of equipment, multiple voltages are in order.

Measurement Range: Testing goals determine whether basic function is all that is needed, or enhanced range is recommended. Testers with extended range afford actual measurements from the time of installation, thereby establishing a long timeline that gives maintenance personnel plenty of breathing room.

Digital vs. analogue displays:
The pointer movement, or travel, of a mechanical analogue display tells an experienced operator valuable information. It is important to identify if the pointer is travelling smoothly or is it wavering in between. These details are difficult to identify from the digits scrolling on electronic displays. On the other hand, when the pointer travel stops, it is the responsibility of the operator to note down the readings from the scale, and there is a scope of manual error occurring. This manual error is removed with digital model, as they provide the exact reading which has been taken. Some testers feature electronic combination displays that offer both digital accuracy and a moving indicator, combining the advantages of both traditional display types.

Numerous other factors like accuracy of the tester, battery life, Backlit display, Test record data etc. can also play a role in you choosing a good tester.

Looking at all these factors, you must be wondering about how to find a good tester, right? We, at UdeyRaj Electricals, have developed a megger insulation tester that will do the work for you. Our insulation resistance tester, also known as megger, comes with numerous features developed to provide your house with utmost safety and is easy to use. It ticks all the checkboxes, and has a load of other features too which make it perfect for your households. Because we do not think that safety is something our customers should consider as an add on feature, but it is something that they are entitled to!

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