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Which LVD harmonised standard[s]?

Hi all,

I'm new to designing electrical equipment for 'test rigs', equipment I wouldn't define as machinery. On these rigs there may be measurement instrumentation, a low voltage control panel with a PLC, switchgear and control gear along with emergency stop circuits, The plant may have pipelines containing non-hazordous liquids/gases and control valves and pumps, but no external moving parts.

So i'd like to know if there is a definitive LVD harmonised standard that I can buy with the aim of CE marking this equipment (obviously there's the EMC directive to condider but i'm just thinking in terms of the LVD as I don't beleive the Machinery Directive is relevant here, but maybe i'm wrong). Can for example EN60947-5-1 cover the LVD or is there a host of other standards I've not considered?

Also, where can the IET wiring regs BS7671 be of use for the purpose of CE marking electrical equipment?

Thanks in advance

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0 Alasdair Anderson over 5 years ago

Starting with your final question and working backwards....

BS7671 can't be used for CE marking electrical equipment as it is a British Standard, not a European one. Only European Standards (EN xxxxx / BS EN xxxxx), Cenelec Harmonised Documents (HD xxxxx) or International Standards (e.g. IEC) can be used for that.

If you CE mark the equipment it is a declaration that the equipment complies with all the relevant standards - you can't pick and choose. It doesn't even limit it to the LVD but means it must comply with any relevant directive (including the Machinery Directive, EMC, Pressure Equipment Directive, etc.). Of course if you can show that a particular directive is not applicable then that is fine. However beware of assuming a directive does not apply as it is best to read the exclusions rather than be caught out. The directives are normally available to download so it should be easy to check.

If you want to know what standards are called up by the LVD I would suggest the following:

https://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/low-voltage_en .

I know it is a daunting list but you can probably ignore a lot of them as many are only applicable to particular equipment.

Alasdair
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0 Alasdair Anderson over 5 years ago

Starting with your final question and working backwards....

BS7671 can't be used for CE marking electrical equipment as it is a British Standard, not a European one. Only European Standards (EN xxxxx / BS EN xxxxx), Cenelec Harmonised Documents (HD xxxxx) or International Standards (e.g. IEC) can be used for that.

If you CE mark the equipment it is a declaration that the equipment complies with all the relevant standards - you can't pick and choose. It doesn't even limit it to the LVD but means it must comply with any relevant directive (including the Machinery Directive, EMC, Pressure Equipment Directive, etc.). Of course if you can show that a particular directive is not applicable then that is fine. However beware of assuming a directive does not apply as it is best to read the exclusions rather than be caught out. The directives are normally available to download so it should be easy to check.

If you want to know what standards are called up by the LVD I would suggest the following:

https://ec.europa.eu/growth/single-market/european-standards/harmonised-standards/low-voltage_en .

I know it is a daunting list but you can probably ignore a lot of them as many are only applicable to particular equipment.

Alasdair
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Which LVD harmonised standard[s]?

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