10‘‘ colour touchscreen: 1805 & 1886 series
Modern digital technology for safety-current-limited applications or those at 500 VA / 200 mA.
With the leakage current testers of SPS electronic, measurements can be performed in accordance with national and international standards (IEC, EN, UL, VDE etc.). The multifunction testers of the new generation of SPS electronic come with the leakage current measurement option. A fully electronic, internal source generates the increased rated voltage.
Applied many times in the type test, repeat test and repair, the leakage current test is rarely required as a routine test in production. The standards (IEC, EN, UL, VDE) require this test only for sensitive, electronic products.
Particularly when medical products are manufactured, it is necessary to measure the leakage current, which is passed on by humans. Even if an error occurs, for example, when the DUT is broken or the ground bond test is not available. The special feature of the leakage current test results from the test under increased rated voltage. Therefore, it is possible to include internal factors during the measurement. This is often necessary, e.g. in a self-retention, the DUT can be switched on only if voltage is applied.
The leakage current results from the voltage drop through a network of resistors and capacitors. This should correspond to the electrical equivalent circuit of the human body. The process A1 (phase), A2 (phase / neutral reversed) and B (not in operation, L and N are bridged) give the same reading. This means that B is the sum of A1 and A2. For sensitive devices such as those in medical technology, additional measurements on electrical interfaces or connections (for example, sensors) are necessary.
In addition to the individual tester AI 5601, SPS electronic offers the leakage current test also in the multifunction testers. The safety testers of the new generation always come with this measurement option. The test method B is an option if the leakage current needs to be measured for reasons of quality (for example, in electric heating rods). This equivalent leakage current measurement leads to the same result as the sum of A1 and A2. The leakage current can be measured and evaluated, without the DUT being operational and requiring much energy. If the standard does not require the leakage current test, which is almost always the case, the result for the routine test is an optimum solution in terms of quality (the leakage current is checked) and economy (no energy consumption and no expensive testing equipment for testing at increased rated voltage).
If a leakage current test according to the method A1 and A2 is required, there are corresponding additional devices with interfaces for many multifunction testers. Thus, all requirements are taken into account.
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