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.
Upon the manufacture or assembly of an appliance or product, it is usual for some degree of electrical leakage to occur. However, the leakage is usually very low and is brought about by internal capacitance and voltages inside the appliance. It is normal for such leakage to occur and it needs to be expected of every device. There exist a number of instances where the leakage, for some reason, may be excess.
Faults in the design or disintegration of product insulation among many other reasons may be the cause of the excessive leakage. These flaws often cause excessive leaking of current and may give rise to electrical shock for any individual that comes into contact with the defective appliance. The essence of a hipot test is to ensure and verify that the product has enough insulation so that the user of the device may not be electrocuted.
Dielectric Withstanding Voltage (DWV) is another term used in place of the term hipot test. This process involves application of a high voltage between the earth ground shielding and the conductor in the product that carry current. Exposure to excessive voltage causes resultant current flow through the product. A high potential tester is the gadget used in monitoring of this resultant current, which is also called leakage current.
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 objective during testing is to stress the insulation in the product. However, apart from inducing stress on insulation, the test detects any workmanship defects that may be present. The workmanship monitoring focuses on the tiny gap spaces occurring between the earth ground and conductors that carry current in the device. In normal working environment, these small gaps can be closed by dirt, humidity, vibration, shock, or contaminants.
When these small gaps close, the flow of current is enabled. This flow of current can be a major electrical hazard. Prior to product release into the market, it must be tested verify that such hazards cannot occur. The only applicable method that can be used in the detection of this type of defects is DWV. This is true in spite of there being other viable methods.
Manufacturers use high potential testers to do the verification of electrical insulation. Often, this simple electric device comprises of a switching matrix, current meter, and a source for the high voltage. All the points located on the cable are connected to the high-voltage source and the current meter through the matrix. Including a display and a microcontroller helps to automate the testing process.
Upon the manufacture or assembly of an appliance or product, it is usual for some degree of electrical leakage to occur. However, the leakage is usually very low and is brought about by internal capacitance and voltages inside the appliance. It is normal for such leakage to occur and it needs to be expected of every device. There exist a number of instances where the leakage, for some reason, may be excess.
Faults in the design or disintegration of product insulation among many other reasons may be the cause of the excessive leakage. These flaws often cause excessive leaking of current and may give rise to electrical shock for any individual that comes into contact with the defective appliance. The essence of a hipot test is to ensure and verify that the product has enough insulation so that the user of the device may not be electrocuted.
Dielectric Withstanding Voltage (DWV) is another term used in place of the term hipot test. This process involves application of a high voltage between the earth ground shielding and the conductor in the product that carry current. Exposure to excessive voltage causes resultant current flow through the product. A high potential tester is the gadget used in monitoring of this resultant current, which is also called leakage current.
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 objective during testing is to stress the insulation in the product. However, apart from inducing stress on insulation, the test detects any workmanship defects that may be present. The workmanship monitoring focuses on the tiny gap spaces occurring between the earth ground and conductors that carry current in the device. In normal working environment, these small gaps can be closed by dirt, humidity, vibration, shock, or contaminants.
When these small gaps close, the flow of current is enabled. This flow of current can be a major electrical hazard. Prior to product release into the market, it must be tested verify that such hazards cannot occur. The only applicable method that can be used in the detection of this type of defects is DWV. This is true in spite of there being other viable methods.
Manufacturers use high potential testers to do the verification of electrical insulation. Often, this simple electric device comprises of a switching matrix, current meter, and a source for the high voltage. All the points located on the cable are connected to the high-voltage source and the current meter through the matrix. Including a display and a microcontroller helps to automate the testing process.
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