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Toshiba Aquilion TSX-101A/I Series Site Planning Manual
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No. 2A201-519EN*A398.1.3.2 CountermeasuresIf a ground fault interrupter is to be installed, note the following points:• The sensitivity current should be 100 mA.• The ground fault interrupter should be noise proof.(For example, Toshiba model NJV225F or equivalent)It is desirable that the breaker be replaced with a Toshiba-recommended breaker to preventthe leakage current problem described above.Countermeasures against incorrect operation due to high-frequency elements have beentaken in the leakage detector of the recommended breaker, therefore the effects of the high-frequency elements are eliminated.The actual characteristics are shown in figure 8.1-3.For the leakage alarm as well as for the breaker, investigate countermeasures to reducehigh-frequency electromagnetic radiation.Since the 50-Hz element is small, if the high-frequency element is reduced, it becomespossible to eliminate the problem without changing the sensitivity setting.500010005001005050 100 500 1K 10K 100KOperation current (mA)Frequency (Hz)Figure 8.1-3 Frequency characteristics of the sensitivity of the recommendedbreaker (NJV225F) to electrical short circuits |
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