2012年7月23日星期一

Leakage current tester is an abbreviation for high potential

Leakage current tester is an abbreviation for high potential

is an abbreviation for high potential. Traditionally, Hipot is a term given to a class of electrical safety testing instruments used to verify electrical insulation in finished appliances,Nike Zoom Kobe V Black Purple Sko, cables or other wired assemblies,Nike Air Footscape Woven Rainbow, printed circuit boards,Hogan Interactive Donna 2012 Rosa Giallo, electric motors,Frauen MBT Kisumu 2 Sandale - 004, and transformers. The term Hypot is a trademark for hipot testers made by Associated Research. >


A Hipot test (also called a Dielectric Withstand test) verifies that the insulation of a product or component is sufficient to protect the operator from electrical shock. In a typical Hipot test,MBT Sifa DaMänner Freizeitschuh Kaffee, high voltage is applied between a product's current-carrying conductors and its metallic chassis. The resulting current that flows through the insulation,Nike Zoom Kobe VI Sko Hvid Blå Sko, known as leakage current,Nike Free Run 2 løbesko blå sort, is monitored by the tester. The theory behind the test is that if a deliberate over-application of test voltage does not cause the insulation to break down,Mbt Salama Sandale, the product will be safe to use under normal operating conditions -- hence the name,Frauen MBT Laufschuhe Weiß Blau, Dielectic Withstand test.

Dielectric breakdown Test. The test voltage is increased until the dielectric fails,Hogan Hi-Sprint Argento Nero Uomo Scarpe hotsale, or breaks down, allowing too much current to flow. The dielectric is often destroyed by this test so this test is used on a random sample basis. This test allows designers to estimate the breakdown voltage of a product's design.

Dielectric Withstand Test. A standard test voltage is applied (below the established Breakdown Voltage) and the resulting leakage current is monitored. The leakage current must be below a preset limit or the test is considered to have failed. This test is non-destructive and is usually required by safety agencies to be performed as a 100% production line test on all products before they leave the factory.

Insulation Resistance Test. This test is used to provide a quantifiable resistance value for all of a product's insulation. The test voltage is applied in the same fashion as a standard Hipot test, but is specified to be Direct Current (DC). The voltage and measured current value are used to calculate the resistance of the insulation.

For a high current (usually 25-30A AC) is applied to the product under test to verify that all conductive parts of said product (exposed to the user) are connected to power line ground.

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