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Benning ST 750A Manual

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08/ 2012 15 / 58
BENNING ST 750 A
8. Overview for Tests according to DIN VDE 0701-0702:2008-06
Protection class I
(with protective conductor)
- extension cables and connecting cables
- electrical equipment, e.g. electrical hand tools
Protection class II
(without protective conductor)
- device connecting cables
- electrical equipment, e.g. electrical hand tools
Protection class III
5.1* Scope of testing: *) The gures stated refer to DIN VDE 0701-0702:2008-06.
5.2 Visual inspection
Check for visible defects and suitability regarding the eld of application:
- connecting cables / plug-and-socket connections
- housing, strain relief, protection against bending and kinking ...
5.3 Testing the protective conductor
Continuity between the earthing contact of the mains plug and acces-
sible conductive parts of the device or of the device connection
For cables with a rated current of ≤ 16A
up to 5 m: ≤ 0.3 Ω
for each further 7.5 m additionally:
0.1 Ω
maximum:
1.0 Ω
For cables with higher rated currents, the calculated ohmic resistance
value shall apply
--- ---
5.4 Measuring the insulating resistance
3
≥ 1 MΩ
≥ 2 MΩ for proving safe isolation
≥ 0.3 MΩ for devices with heating elements
1
with a power of ≥ 3.5 kW
≥ 2 MΩ ≥ 0.25 MΩ
5.5 Measuring the protective conductor current
2, 3
≤ 3.5 mA
4
at conductible components with protective conductor connection
1 mA/ kW to max. 10 mA for devices containing heating elements
with a total power of more than 3.5kW
--- ---
5.6 Measuring the contact current
3
≤ 0.5 mA
at conductible components without protective conductor connection
≤ 0.5 mA
at conductive components
---
5.7 Proving safe isolation (SELV, PELV)
3
For devices generating a SELV or PELV voltage by means of an isolating
transformer or a switch-mode power supply
Proving the rated voltage: (compliance with specications (SELV/PELV))
- Output voltage measurement (e.g. for chargers, mains supply units): max. 25V AC or 60V DC for accessible active parts
- Insulating resistance measurement (primary / secondary)
- Insulating resistance measurement (between accessible conductive parts and active parts of the SELV / PELC circuit)
5.8 / 5.10 Functional test
Functioning of safety equipment and function test
Analysis, evaluation, documentation
Additionalnotesconcerningthetable"TestsaccordingtoDINVDE0701-0702":
1
If for devices containing heating elements with a power P > 3.5 kW the value falls below the limiting value, the device still shall be considered to be in proper condition as long as the limiting value for
the protective conductor current is not exceeded.
… 15 …


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