78
A
Leakage Current Tester 92-4A, -4D, -4E, -4G
BASIC TEST MODES
VI.v Measuring of contact currents according EN 60950/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.
Measurement circuit according EN 60990-1 Fig. 4.
Circuit diagram:
Illustr. VI.5: 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
