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What does SELV stand for? 

What does SELV mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: SELV.

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SELV

Separated Extra Low Voltage

Academic & Science » Electronics

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SELV

Safe Extra Low Voltage

Academic & Science » Electronics

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SELV

Safe Extra Low Voltages

Miscellaneous » Unclassified

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SELV

Safety Extra-Low Voltage

Academic & Science » Electronics

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SELV

Sistema Electronico de Logstica de Vacinas

Miscellaneous » Unclassified

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SELV

Safety Extra Low Voltage

Miscellaneous » Unclassified -- and more...

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What does SELV mean?

selv
Extra-low voltage (ELV) is an electricity supply voltage and is a part of the Low voltage band in a range which carries a low risk of dangerous electrical shock. There are various standards that define extra-low voltage. The International Electrotechnical Commission (IEC) and the UK IET (BS 7671:2008) define an ELV device or circuit as one in which the electrical potential between two conductors or between an electrical conductor and earth (ground) does not exceed 50 V AC or 120 V DC (ripple free). The IEC and IET go on to define actual types of extra-low voltage systems, for example separated extra-low voltage (SELV), protected extra-low voltage (PELV), functional extra-low voltage (FELV). These can be supplied using sources including motor / fossil fuel generator sets, transformers, switched PSU's or rechargeable battery. SELV, PELV, FELV, are distinguished by various safety properties, supply characteristics and design voltages. Some types of landscape lighting use SELV / PELV (extra-low voltage) systems. Modern battery operated hand tools fall in the SELV category. In more arduous conditions 25 volts RMS alternating current / 60 volts (ripple-free) direct current can be specified to further reduce hazard. Lower voltage can apply in wet or conductive conditions where there is even greater potential for electric shock. These systems should still fall under the SELV / PELV (ELV) safety specifications.

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