- Each500kVtransmissionlinewillbeprotectedbytwoprimarypilotrelayingsystemswithabackuprelayingtoachieveprimaryandsecondaryprotection.Askyourselfthis:Whydidn'ttheydefendyouinsteadofrelayingwhatwastold?Anelectronicdevicethatiscapableofrelayingasignalwith...
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