Leakage Current Measurement - HT HT77N User Manual

4.3.2. Leakage current measurement

Fig. 4: Measuring leakage current with direct
method in a single phase load
Fig. 6: Measuring leakage current with direct
method in a three phase load
Leakage current measurement with Direct method on earth conductors
1. Switch on the clamp by pressing the
2. Select the desired capacity with the Range key or keep in the Autorange mode
3. Open the clamp jaw and connect the clamp as shown in Fig. 4 or Fig. 6. The leakage
current value will be shown on the display
4. For Hold, Data Hold, Auto Hold and Peak Hold feature refer to § 4.2
Leakage current measurement with Indirect method
1. Switch on the clamp by pressing the
2. Select the desired capacity with the Range key or keep in the Autorange mode
3. Open the clamp jaw and connect the clamp as shown in Fig. 5 or Fig. 7. The leakage
current value will be shown on the display
4. For Hold, Data Hold, Auto Hold and Peak Hold feature refer to § 4.2
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Insert the cable(s) in the middle of the clamp jaws, in order to obtain
accurate measures. Use the marks as a reference (see § 4.1.2)
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CAUTION
Fig. 5: Measuring leakage current with
Fig. 7: Measuring leakage current with
key
key
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indirect method in a single phase load
indirect method in a three phase load
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