I. Introduction
This article will introduce the latest version of the European Union Low Voltage Directive and how to meet the requirements of the new directive, the focus will be on the test report contains the documentation requirements of the CE technology, to assist firms in response to LVD directive. This brief statement of the general requirements for instruction, then, to focus on testing requirements, and provide some examples of how to comply with LVD test related issues.
Two, LVD scope
LVD applies to all its functions using the AC voltage range 50 ~ 1000V, DC 75 ~ 1500V of electrical products, this definition refers to the scope of instruction, rather than the applicable limit command (for example, a computer using AC 230V, DC 12V circuit is also affected by the dangers posed by the specification LVD).
LVD applies to the consumer and industrial use of the product, if it is industrial equipment, instruction also covers the use of the product manufacturers themselves (for example: test equipment).
Three, CE technical file requirements
LVD and EMC directives the CE system is similar to all products within the scope must have the CE mark and must be representative of the manufacturer or importer has signed the Declaration of Conformity.
Simple self-declaration is not sufficient to determine the product is safe ("security" is defined as persons or domestic animals without causing casualties and financial damage), for this reason, LVD's statement the need for technical support document files to prove.
Technical documentation must contain:
1 A general description of Equipment
(2) conceptual design and manufacturing drawings
3 necessary to understand these drawings describe and illustrate
4 lists all or part of the applicable standards, and describes the security point of view to meet the directives adopted by the response
5 The design of the projection results, perform the inspection process
6 The test report
Manufacturers have to use all necessary means to ensure that the manufacturing process meet the technical document, the contents of the file should be clear that the product design point of view, is safe, but also to determine the manufacturing process have been met.
Establish better safety design approach is to first reconcile that meet the criteria listed, and to test report as evidence. Periodically reconcile the standards will be published in the Official Journal of EC (Official Journal). Use has been approved by the file (such as EN specifications) can be determined to consider this person ready to file its industry in the best information, not just their own experience. In any case, this declaration must take into account the necessary safety standards LVD, and this specification may be beyond the harmonic standards. In general, if the product is clearly in a range of EN standard specification, this EN standard is sufficient.
To ensure compliance with the sustainability of manufacturing quality system has to be compared to the corresponding parameters of safety assessment. First, each sample is made prior to shipment off the assembly line testing (including grounding continuity, strength of electrical insulation resistance, insulation resistance), and secondly, is to be able to collect from the test results and product safety related to the critical group parts and materials (critical components and materials) (such as fuses, isolation transformers, flammable plastic), according to EN standards for testing can identify the key components.
Fourth, the security test

According to a specification approved by the test and whether it meets the technical requirements of the directive of the key factors, the test by the manufacturer or manufacturers that have capable people to implement (ie, perform the test or by a third party organization as a consultant).
Choice test in the factory or outside the factory, usually according to the manufacturer's conditions and will, and sometimes the buyer's requirements. In any case, in fact, the most important factor is the reliability of the final result, signing the declaration should know that these test results are the basis for legal defense, but it must be correct and reproducible. If not corrected by the instrument or inexperienced staff measured results may not meet these requirements.
For many people, their only experience of the product test related instructions from EMC, LVD directive of the test a little bit different, simply put, EMC has been defined for the test is a good way to limit the measurement, the LVD Some test data collection is to support a generally more subjective judgments, LVD testing standards are very complex and demanding explanations and conclusions required test results, it is usually very thick file.