subject: I Will Tells Of The Introduction About Leakage Current Tester [print this page] Leakage present tester is applied to test the operating power source along with other power source of the electric equipment, and itll interrupt the produced leakage present which happens to be not related with the operation via the insulation or distributed parameters. Its input impedance is simulating the impedance of the body of a human. So leakage existing tester is suitable for the safety testing specifications of the household appliances, electrical machines, electronic equipment at the same time as other electrical products, moreover, leakage existing tester is also the required testing device inside the laboratories and also the technical supervision departments. For that reason, leakage present tester is broadly used in such industries as IT business, household appliances industry, medical equipment business and other industries.
Leakage current tester is primarily composed by the impedance conversion, range conversion, AC-DC conversion, zoom, instruction devices as well as other devices. Some leakage present testers even have the over-current protection device, sound-and-light alarm circuit and testing voltage adjustment device. And its instruction device is classified into two sorts, namely, the analog kind along with the digital form. In addition, leakage existing tester can test the following currents, for example, the get in touch with existing, the open-circuit voltage, the existing of the protective conductor, the leakage existing towards earth, the leakage existing towards surface, surface-to-surface leakage present.
The testing notices are as follows:
First, to test the leakage current under the operating temperature, if the measured electric device is not powered by the isolation transformer, the measured electric device must utilize material using the trustworthy insulation, and the measured electric device can utilize the insulation pad to insulate using the ground. Or else, therell be some leakage current directly flowing via the ground as an alternative to flowing by means of the
leakage current tester
, which consequently affects the accuracy of the measured data.
Second, when leakage existing tester is testing the measured electric device, the measured electrical safety tester device is charged when it truly is undergoing the testing, in other words, the outer casing of the measured electric device is charged. Hence, the testing personnel ought to pay due attention towards the safety, and several sorts of testing rooms ought to make out the operation safety rules. Just before cutting off the existing, nobody can touch the measured electric device.
Third, individuals really should minimize the influence of environment on the testing data. The testing environment temperature, humidity along with the polluted circumstance of the insulated surface have the fantastic impact on the leakage current. The high temperature, high humidity and also the severe polluted circumstance of the insulated surface would make greater of the measured leakage present information by leakage present tester.
