Testing The Contact Current; Figure 17Testing The Contact Current, Class I (Connection Diagram Exemplary For Vde 0701 And Vde 0702, Circuit Diagram) - Benning ST 755+ Operating Manual

9.5.4

Testing the contact current

The contact current test [} page 44] is intended to check the test sample for contact current on
every accessible conductive part without protective conductor connection. This is to ensure that
there is no risk of a dangerous electric flow via accessible conductive parts.
Requirements
• Approved safety measuring lines
• Please observe the requirements for measuring [} page 71].
• The test sample is disconnected from the mains.
• Make sure that you are familiar with the procedure for manual [} page 77] and automatic
[} page 76] testing.
• The test sample has passed the insulating resistance test [} page 80].
• Make sure that you know the necessary measuring points.
• The test sample is connected according to the connection diagram.
Figure 17: Testing the contact current, Class I (connection diagram exemplary for VDE 0701 and
VDE 0702, circuit diagram)
1 Direct current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components of the test
sample without PE connection.
2 Differential current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components of the test
sample without PE connection.
3 Alternative leakage current measuring method (Class I, I
The shock-proof plug of the test sample is plugged into the test socket of the device.
Use the test probe for measuring on all accessible conductive components of the test
sample without PE connection.
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9.5 Individual tests
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