Difference between High Impedance REF Protection and Low Impedance REF Protection Relay

[@kesarisrikanth1223]

Good explanation

[@nerosmero1183]

Great thanks

[@relayprotectionelectrical]

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[@mkhoirun918]

What is Is here meaning? I setting?

[@relayprotectionelectrical]

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[@KarthiKeyan-uh5fw]

Well explained 🎉🎉🎉

[@velusamypothiraj2300]

Why high impedance earth fault relay ct S2 terminal not earthed?

[@relayprotectionelectrical]

It should be earthed.

[@AtriadGamasekav]

this has to be done to ensure that during failure of the CT insulation, the potential on the measuring circuit cannot rise uncontrollably high.

[@Technicalcobra]

what's difference between 64 AND 87N protection

[@relayprotectionelectrical]

Yes there are difference. 64 is more sensitive compared to 87N. You can watch video regarding how much winding is protected by Differential Relay
czcams.com/video/feVOOoEHxQE/video.htmlsi=ecA4qIhO5bzH4ive

[@Technicalcobra]

@@relayprotectionelectrical what is name of both protection?