User manual

GMC-I Messtechnik GmbH 13
5 Testing Devices per DIN VDE 0701-0702
The limit values specified in the following chapters correspond to current revision levels of
official standards at the time of going to print. Please note that normative legislation is contin-
uously updated to meet the safety requirements necessitated by changing market situations,
and that the listed limit values are thus subject to change. Please contact our update service
department in order to adapt test instruments to new standards.
5.1 General
According to DIN VDE 0701-0702, repaired or modified electrical devices must provide users
with the same protection against electrical energy as is offered by new devices. The following
tests must be performed to this end, in the order indicated:
1 Visual inspection
2 Protective conductor resistance
3 Insulating characteristics:
if technically sensible, i.e. if the DUT does not include any all-pole,
electrically actuated switches:
– Insulation resistance followed by protective conductor current or equivalent leakage
current
– Other: leakage current during operation (protective conductor current and contact
current), safety extra-low voltage (only at connecting points for safety extra-low
voltage generated within the device under test)
4Function test
5 Labelling inspection
6Documentation
Attention!
!
If any doubts exist concerning the performance of an insulation resistance
measurement, a differential current measurement can be performed in its place.
For example, this may be the case with electronic devices and data processing
equipment, or safety class I devices if it is assured that all components which are
charged with line voltage are covered by this measurement.
This measurement may only be performed after the protective conductor at the DUT
has been tested.
The device under test must be plugged into the mains outlet at the
METRATESTER 5 test instrument for measurement of residual current.
Note!
An RCCB may be tripped if measurement is performed at a defective device!