Examples of Basic insulation in a sentence
Basic insulation level (BIL) tests of the standard rated lightning impulse and power frequency withstand voltages were tested at >95 kV and at >38 kV, respectively.
Note 1: Basic insulation does not necessarily include insulation used exclusively for functional purposes.
Basic insulation: Insulation applied to live parts for protection against direct contact under fault-free conditions Double insulation: Insulation comprising both basic insulation and supplementary insulation Supplementary insulation: independent insulation applied in addition to basic insulation for protection against electric shock in the event of a failure of the basic insulation Reinforced insulation: Insulation of live parts for protection against electric shock equivalent to double insulation.
Supple- mental insulation could be a grounded chassis or a second independent insulation mechanism.Double InsulationAn insulation system that provides Basic insulation plus an independent “supplemental” insulation that re- duces the risk of shock if the Basic insulation fails.
Basic insulation between enabling current paths(Impulse voltage withstand level: 4 kV)A mixture of SELV and PELV is strictly prohibited.
Probably the most notable ones are the far- reaching generalisations of Van der Waerden’s theorem (which will be stated shortly), namely the Szemerédi’s theorem [Sze75] on arithmetic progressions in dense subsets of integers and the Green-Tao theorem [GT08] on the arithmetic progressions in prime numbers.The beginning of what is today known as Ramsey theory dates back to the 1890s and the work of Hilbert [Hil92] on the irreducibility of rational functions.
A general rule of thumb for isolators is that the device must be able to withstand an applied voltage of 2500 Vrms for 1 minute and must provide an isolation barrier insulation resistance of at least 109 Ω to provide basic insulation.Supplemental InsulationA second, independent, insulation that is added to Basic insulation to achieve double insulation.
Basic insulation: Insulation applied to live parts to provide basic protectionagainst electric shock and which does not necessarily include insulation used exclusively for functional purposes.
NOTE Basic insulation has been increased because transformers are subjected to surge voltages due to the inductive nature of their loads.
Table 1 – Basic insulation [Table C6 of IEC 60255-27:2013] Nominal ratedinsulation voltage or workingvoltage(r.m.s. ord.c.) up to Clearance115011511152115311541155 Linear interpolation may be used between the nearest two points, the calculated minimum CLEARANCE and CREEPAGE DISTANCE being rounded up to the next higher specified increment.