Monday, 21 January 2019

Useful Information Regarding Hipot Tester

By Diane Bailey


High voltage or high potential test is what the phrase hipot test means. Dielectric withstand test is the other name for this test. It is an analysis of electrical parts. It is done purposely to check for suitability of the electrical insulation. Ensuring current leakage from one place to another within electrical devices does not exist is the goal the analysis is meant to achieve. This analysis is the exact contrary of continuity test. This is what Hipot tester are all about.

Hipot testing is meant to be nondestructive and only to test the potency of electrical insulation. The testing uses high-voltage and is widely applied to all electrical gadgets for a certain period of time to be able to make sure that the insulating column is not marginal. The method involves applying the insulation with excessive amounts of voltage.

The reason for the process is to detect the presence of nicked or crushed insulation in a device. It also enables the identification corrosive or conductive contaminants, stray wire strands, and braided defensive around conductors. Tolerance mistakes in cables and troubles in terminal spacing can also be diagnosed easily by using hipot testing. Voltage that is used on this system is commonly two times more than the operating voltage.

Hipot testing is normally carried out by use of hipot analyzers. A normal tester usually connects one side to earth while the second part of the tester is connected to conductor that needs to be analyzed. In the arrangement, there are two contact points to which conductors may be connected, the ground and voltage.

In case there are two contacts that need to be connected, then one has to be connected to the voltage while the other is connected to the ground. This kind of connection is important because it ensures that contacts are isolated from kinds of other contacts. If the insulation between the two conductors is inadequate, then a small current will flow between the conductors when a huge voltage is applied.

The flow of that tiny current is normally acceptable. However, a breakdown of air or solid insulation is supposed not to happen in any case. It is understood that any product is normally subjected to normal everyday transient over voltages. That is why high voltage is normally applied in these tests. Therefore, the product should remain safe and operational in event such differences in voltages happen during the day.

While doing this analysis, varying standards are normally observed. The voltage should be applied for varying amounts of time as required by different standards. The test needs to be continued for a one-minute duration. This requirement is under IEC 06950. A typical rule of thumb requires applying 110 to 120 percent of operational voltage of the product. This is plus 1000 volts for 1 to 2 seconds.

There also are specifications for the quantity of current that is supposed to be applied. As of now, there are several distinct varieties of testers available in the market for people to purchase. Different types of testers are designed for different categories of products. It is therefore critical to know which tester to apply for certain applications.




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