4 . Electronic CE authentication

release time :2021-12-24 15:43:22

low - voltage EMC and LVD certification

in general low - voltage electrical products contain not only the Low Voltage Directive ( LVD ) also contains the Electromagnetic Compatibility Directive ( EMC ) ,
and also of the products only the EMC Directive .

1 , of what it means to be a low voltage ( LVD )

Low Voltage Directive with its full name is the Low Voltage Directive 2006 / 95

Here the so - called low voltage refers to the 3 volts , 5 volts , or 12 volt or 24 volt , low voltage ( LVD ) of the target device at low voltage in order to ensure the safety in use .

low - voltage equipment is defined as a nominal voltage of an alternating current is 50 to 1000 volts , from 75 to 1500 volts DC when the electrical equipment . Broadly speaking ,
the low - voltage apparatus contain a consumer product and being designed in such a way that this voltage within the range of operation of the device . contain household appliances ,
hand tools , lighting equipment , wires , and cables and pipelines , and the wiring equipment etc . This instruction included operation of this device in all safety rules , including
the protection due to mechanical reasons . corresponding to the LVD standards such as EN 60335 ) ( appliances , lighting products ( ) ( ) is checked against EN60598.1 and EN60598.2 EN60065 ,
audio - visual products , information products ( EN60950 ) , electrical machinery ( EN60204 ) , measuring instruments ( EN61010 ) .

LVD specifies the EU Member States must take appropriate actions to avoid that in the domestic market in sales of electrical equipment and absence of risks to the security of the population ,
but should not endanger domestic animals or property . Therefore , must :

Equipment must be according to the security code to good fashion design

Equipment must be correctly installed and maintenance

The equipment must be designed in accordance with use purpose

Product safety is a key factor :

1 . by an appropriate insulation system and insulation barriers , to prevent a shock hazard protection

2 . to minimize the risk of fire , as low as the combustible component and fireproof material , to prevent the danger of fire protection

3 . adequate supervision , to protect against mechanical hazards

4 . Supervision and fenced off for protection to prevent external leakage of radioactive and dangerous ( the same as X light , microwave )

5 . The protective barrier assembly and to prevent exposure to hazardous energy ( high current )

6 . to prevent danger from leakage

etc . .. . .. . .. . .. . .. . .. . .. . .. . .. . ..

LVD Low Voltage Directive generally do a test like : ground continuity test , high voltage resistance test , insulation resistance testing , functional testing , temperature rise test ,
cord pulling test , test equipment , creepage distance test etc .

2 , What is EMC

EMC Directive with its full name is : Electromagnetic Compatibility Directive 2004 / 108 / EC

In explaining the flow of the EMC Directive , EMC is defined as follows :

a device or other devices are operated at the same time , since the electromagnetic interference problem does not affect the normal working ability . contains 2 parts : EMI , EMI ,
EMS - - - - - - interference

/ electromagnetic interference ( EMI ) : a device or device during operation of an unfavourable function of the signal occurs , the signal is undesirable and pointless , it ' s probably
coming from the outside is also possible from their own .

EMI can be divided into two directions are considered :

CE ( Emission ) : conducting radioactive

Williams ' RE ( Emission ) : radioactive radiation

etc . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

( EMS / immunity ) : a device or apparatus in operation is not affected by the surrounding electromagnetic environment .

electromagnetic tolerance can be divided into two directions are considered :

( CE ) : conducting radioactive

Barros ( RE ) : radioactive radiation

etc . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .. . .

LVD for CE systems with EMC directive , all within the scope of application of the product must have a CE mark , and they must be made by the representatives of the
manufacturer or importer which conforms to the declaration . simple self - declared insufficient to determine the product is safe ( " security " is defined such that it does
not cause a person or livestock casualties and financial damage ) and for this reason , the LVD statement requires technical documents and archives of the support .

Technical certificates must contain :

. 1 general description of the product

2 . The product drawings

3 . The pattern required for the description and illustration of the

4 . List all or part of the applicable standards , and described as satisfies the safety standpoint , the adoption of countermeasures

5 . Design the calculate result , performs a process of checking

6 . Test Report

7 . The product risk assessment report

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