1.0Electrical Riddlehttps://electrical-riddle.com/enElectrical Riddlehttps://electrical-riddle.com/en- Electrical Riddlerich600338<blockquote class="wp-embedded-content" data-secret="gDJ15piEBD"><a href="https://electrical-riddle.com/en/forums/reply/1201/">Reply To: Protection riddle no.8 – Risk of operation in power plant</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://electrical-riddle.com/en/forums/reply/1201/embed/#?secret=gDJ15piEBD" width="600" height="338" title="“Reply To: Protection riddle no.8 – Risk of operation in power plant” — Electrical Riddle" data-secret="gDJ15piEBD" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script>
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Consider standard 11 KV over head line feeder protection having one module consisting over current protection for two phases and an earth fault protection. The earth fault peotection is taken from the current flowing through the cable connecting the CT neutral and relay neutral which can be termed as a residual current. Considering slightly different … Read More »