Performing The Tests - Unitest Telaris 0751 Instruction Manual

Explanations of Terms / Performing the Tests
PE resistance (earth bond):
We are dealing with the PE resistance of the mains
connection point (earth connector of the mains
plug) to all touchable, metal UUT casing parts which
have to be connected to the PE resistance. During
PE or resistance measurement, the connecting lead
has to be moved over the total lengths in sections.
This measurement can only be performed for ap-
pliances of protection class I.
Visual Check:
Here, you must make sure that the appliance parts
contributing to the electrical safety are undamaged
and appropriate. The following must be checked:
• Casing, protection covers
• Connecting leads and plugs
• Condition of insulations
• Strain relief, antikink protection, and arrange-
ment of wiring
• Signs for overload or inappropriate use
• Forbidden interventions or modifications
• Fuse holders and fuses, accessible for the user
• Cooling openings and air filters
• Protection covers
• Overpressure valves
• Fixtures
• Contamination or corrosion which might impair
the safety
• Safety labelling
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5.2 Performing the Tests

The accident prevention prescriptions (German
Unvallverhütungsvorschrift BGV A 2 for "Electrical
Systems and Equipment", issued by the profes-
sional associations (German Berufsgenossen-
schaft) defines the conditions for testing electrical
appliances:
• Prior to first commissioning and after any mod-
ification, after repair, prior to repeated com-
missioning, as well as in regular TIME INTER-
VALS.
• For portable appliances, these TIME INTER-
VALS generally amount to 6 months (for use on
building sites reduced to 3 months).
Depending on the use, this interval is flexible,
provided the appliance safety is ensured. The
test interval can be extended to maximum 12
months for building sites and to maximum 24
months for the use in offices.
The DIN VDE regulations of the series DIN VDE
0701 and DIN VDE 0702 define the test proce-
dure and the limit values.