Protection Engineering Basics and Schemes Protection Engineering | Page 37
Nameplate defines many things now see in front of metering class they mention safety factor and in front of protection burden they mention Accuracy limit factor . There are insulation voltages like power frequency
withstanding voltage , rated insulation voltages and impulse voltages are mention . Other important quantities are network current which subdivided in short time thermal current and dynamic current
Power frequency withstand voltage is voltage which indicate in case of any frequency disturbance that much maximum voltage in mention time CT can bear without damaging itself .