VDE measurements
General
Make sure that your electrical systems or devices do not pose a danger to others.
Testing of electrical systems and equipment according to DGUV V3
Only excerpt from DGUV V3 (dated April 01, 1979 / version dated Jan 01, 1997)
§5 Inspection
- The employer must ensure that the electrical systems and equipment are checked for proper condition:
- Before initial commissioning and after modification or repair before recommissioning by a qualified electrician or under the direction and supervision of a qualified electrician.
- At certain intervals. The intervals must be calculated in such a way that any defects that are likely to occur are detected in good time.
- The relevant electronic regulations must be observed during the inspection
- At the request of the employers' liability insurance association, an inspection logbook with specific entries must be kept
- The initial commissioning test in accordance with paragraph 1 is not required if the manufacturer or installer confirms to the employer that the electrical system and equipment comply with the provisions of this accident prevention regulation.
VDE measurement services
- Appliance measurements according to DIN VDE 0701 / VDE 0702 -> DGUV V3
- Portable electrical appliances
- Stationary electrical appliances
- Measurement of systems in accordance with DIN VDE 0113 / EN 60204 -> DGUV V3
- All measurements in accordance with DIN VDE 0113 / EN 60204 / Machinery Protection Act
- Machinery
- Switch cabinets / switchgear
- Archiving and documentation
- All test specimens from and provided with a barcode that clearly identifies the test specimens
- When measuring, the test specimen and its measurement result are recorded electronically and added to a database
- Of course, the DGUV V3 sticker for the passed measurement process must not be missing
- Thanks to our own programmed database structure and additional tools, we are able to maintain an overview when measuring several thousand test specimens. Statistical evaluations, as well as test intervals of individual test specimens and even recognizing missing test specimens, are no problem for us
- Various data formats for storage and forwarding to our customers are a matter of course:
- Excel format
- PDF format
- Access database
- HTML format
- CSV format
- and much more
Testing of electrical systems according to DGUV V3
Legal regulations
Mandatory legal regulations ensure the safety of electrical systems:
- Energy Industry Act
- Law on technical work equipment
- Accident prevention regulations of the employers' liability insurance associations
All these laws and regulations require that the recognized rules of technology, i.e. DIN VDE regulations, must be observed with regard to the safety of electrical systems and equipment
DGUV V3 (formerly VBG 4 and BGV A2) Accident prevention regulations, electrical systems and equipment
The accident prevention regulations of the employers' liability insurance associations are autonomous legal regulations. They are drawn up according to a specific procedure by the employers' liability insurance associations, adopted, then approved by the Federal Ministry of Labor and Social Affairs and published in the Federal Gazette, i.e. they are legal regulations. They only apply to companies and insured persons of member companies of the employers' liability insurance associations. However, as some judgments, e.g. the well-known Saarbrücken judgment, state, they are valid for all commercially used systems and equipment.
The application and implementation of the accident prevention regulations is monitored by the employers' liability insurance association, and non-compliance may result in sanctions or liability. The DGUV V3 accident prevention regulations for electrical systems and equipment apply specifically to electronics. It adopts specifications from DIN VDE and thus upgrades them legally.
Section 5 of DGUV V3 states:
- The employer must ensure that electrical systems and equipment are checked to ensure that they are in proper condition:
- Before initial commissioning and after changes to repairs by a qualified electrician or under the direction or supervision of a qualified electrician
- At specific intervals - The intervals must be calculated in such a way that any defects that are likely to occur are detected in good time
The relevant electronic regulations must be observed during the test. At the request of the employers' liability insurance association, an inspection logbook with specific entries must be kept
Stationary equipment is fixed equipment or equipment that has no carrying device and whose mass (18 kg for household appliances) is so great that it cannot be easily moved. We do not wish to deal with mobile equipment in this context.
DIN VDE regulations
DIN VDE 0100, Part 610 : “Erection of power installations with a rated voltage up to 1000 volts”; tests, initial tests
DIN57105/VDE0105,Part 1, Part 100: Operation of power installations and stationary electrical equipment, general requirementsDIN VDE 0701,Part 1 - 240: Repair, modification and testing of electrical equipment
Part 1: General requirements
Part 2 - 240: Specific information on certain equipment
DIN VDE 0702. Part 1: Repeat tests on electrical devices that are disconnected from the mains using a plug-in deviceDIN VDE 0113/EN 60204,Part 1: Electrical safety of machines
Carrying out the tests
The tests of all relevant DIN VDE regulations should be carried out in three steps:
- Inspection
- testing
- Measuring
InspectionThe electrical systems and equipment must be inspected to determine whether any external defects are visible. In addition, circuit diagrams, operating instructions and labeling of the circuit and type plates must be available and the equipment for accident prevention and fire fighting must be complete and free of defects. In particular, it must be established whether protection against direct contact with active parts is provided and whether the protective measures against indirect contact are not defective. The cross-section, routing, connection and marking of protective, earthing and equipotential bonding conductors must be checked.TestingTesting is to determine, for example, whether emergency stop devices, insulation monitoring, protective devices and signaling and display devices are functional and whether the system is working properly (function test)MeasuringMeasurements must be taken to determine whether all limit values and requirements specified in the applicable regulations are met.Measurements may only be carried out using suitable test equipment. This means that measuring and testing devices must be used which comply with the specific DIN VDE regulations - DIN VDE 0413, DIN VDE 0403 and DIN VDE 0404.The most important limit values for electrical systems according to DIN VDE 0100, Part 610
Continuity of the protective and equipotential bonding conductors:
These conductors must be tested for continuity; limit values are determined by the specialist on the basis of cross-sectional length. When testing with direct current, the polarity must be reversed.
- In order to achieve accurate measurement results, measuring devices should be able to compensate for the resistance of the test leads used
- Different values when changing polarity indicate an error!
Insulation resistance:
Measurement of all active conductors towards the end of the PE, active conductors may be short-circuited. This is mandatory for systems with electronic equipment - switch cables must also be measured.
- The individual measurement of the conductors against PE is more complex, but provides information about the conditions in the conductor
- Compare common values!
- In the case of capacitive test objects, they must be discharged after the measurement!
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