The term hipot is usually used as an abbreviation for high potential. It is a term that is used to refer to a certain class of electrical safety testing instruments referred to as a hipot tester. These instruments are used in the verification of the electrical insulation in finished cables, appliances, and other wired assemblies. Such assemblies include electric motors, transformers, and printed circuit boards just to mention a few.
In many cases, after the assembling/manufacturing of an appliance/product some current leakage of some level occurs. The interior of the product contains internal capacitance and voltages that often cause this minimal current leakage. It is normal for all devices to experience this leakage. However, in some scenarios, the current leakage may too high that it should be due to certain reasons.
Excess leakage may be caused by break down of insulation in the product, design flaws or many other causes. Such flaws usually lead to excessive current leaking and may cause electrical shock to anyone that comes in contact with the faulty product. The importance of a hipot test is to verify and ensure that the product is sufficiently insulated so as not to cause shock to the operator.
Another name used to refer to hipot test is Dielectric Withstanding Voltage (DWV). During this test, a high voltage is applied between the metallic shielding of the product and its current-carrying conductors. When this is done, there will be a resultant current that flows through the insulation. This current is known as leakage current and a high potential tester is used to monitor it.
One major assumption is made in hipot testing. The assumption is that by applying excessive voltage, the insulation of the product should break, and if it does not, then the device should work fine under normal conditions. The appliance is supposed to be resilient against normal voltage, which is often applied in ordinary everyday use of most devices. It is this assumption that gives rise to the name Dielectric Withstanding Voltage.
The aim of the test is to stress the insulation used in the product. However, besides stressing the insulation, the test is also used to detect defects in workmanship. The most important aspects of workmanship that are monitored are the small gap spacings that occur between current-carrying conductors and earth ground. Under normal operating environment, these small gaps can be closed by contaminants, shock, vibration, humidity, and dirt.
When the gaps are closed, current is allowed to flow. Such conditions can be a major electrical hazard that must be corrected at the factory before the product is released into the market. Such defects cannot be detected by any other method besides DWV. Even though other methods may be used to attempt to resolve these problems, but they cannot be as effective as DWV.
An electric device that manufacturers use in verification of electrical insulation is a high potential tester. It is made of a source of high voltage, a switching matrix and a current meter. Connection of the source of voltage and the current meter is done by the matrix switch. Including a display and a microcontroller automates the process of testing.
In many cases, after the assembling/manufacturing of an appliance/product some current leakage of some level occurs. The interior of the product contains internal capacitance and voltages that often cause this minimal current leakage. It is normal for all devices to experience this leakage. However, in some scenarios, the current leakage may too high that it should be due to certain reasons.
Excess leakage may be caused by break down of insulation in the product, design flaws or many other causes. Such flaws usually lead to excessive current leaking and may cause electrical shock to anyone that comes in contact with the faulty product. The importance of a hipot test is to verify and ensure that the product is sufficiently insulated so as not to cause shock to the operator.
Another name used to refer to hipot test is Dielectric Withstanding Voltage (DWV). During this test, a high voltage is applied between the metallic shielding of the product and its current-carrying conductors. When this is done, there will be a resultant current that flows through the insulation. This current is known as leakage current and a high potential tester is used to monitor it.
One major assumption is made in hipot testing. The assumption is that by applying excessive voltage, the insulation of the product should break, and if it does not, then the device should work fine under normal conditions. The appliance is supposed to be resilient against normal voltage, which is often applied in ordinary everyday use of most devices. It is this assumption that gives rise to the name Dielectric Withstanding Voltage.
The aim of the test is to stress the insulation used in the product. However, besides stressing the insulation, the test is also used to detect defects in workmanship. The most important aspects of workmanship that are monitored are the small gap spacings that occur between current-carrying conductors and earth ground. Under normal operating environment, these small gaps can be closed by contaminants, shock, vibration, humidity, and dirt.
When the gaps are closed, current is allowed to flow. Such conditions can be a major electrical hazard that must be corrected at the factory before the product is released into the market. Such defects cannot be detected by any other method besides DWV. Even though other methods may be used to attempt to resolve these problems, but they cannot be as effective as DWV.
An electric device that manufacturers use in verification of electrical insulation is a high potential tester. It is made of a source of high voltage, a switching matrix and a current meter. Connection of the source of voltage and the current meter is done by the matrix switch. Including a display and a microcontroller automates the process of testing.
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