79
A
Leakage Current Tester 92-4A, -4D, -4E, -4G
BASIC TEST MODES
VI.vi Measuring of contact currents according EN 60745
The measuring of the contact current is carried out according the network
shown below. The contact current have to observe the values predefined
in the EN-standard. A detailed description of the prerequisites for the
measuring contains the EN-standard (see above).
Measurement circuit according EN 60990-1 Fig. 4.
Circuit diagram:
Illustr. VI.6: Basic measuring network for leakage current
measurement for Class I and II test objects.
Class I to PE
A1 - normal polarity without fault
A2 - inverse polarity without fault
Class I to Vi
A1 - normal polarity without fault
A2 - normal polarity with PE-fault
A3 - inverse polarity without fault
A4 - inverse polarity with PE-fault
Class II
A1 - normal polarity without fault
A2 - inverse polarity without fault
Note: The polarity for the steps are defined, in the EN-standard.
