Bus Bar Protection

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jan63 Commentator Join Date: Oct 2010 Posts: 65	Bus Bar Protection 07/26/2018 4:59 AM
	Working in a power station where the switchyard is 500KV.The bus bar is in two section with a tie breaker/bus sectionalizer inbetween. Presently the bus bar has high impedence bus bar differential protection with zone I covering one half of the bus and zone II covering second half. In an upgradation project the equipment on one side of sectionalizer has been changed.Protection now is low impedence. This will mean low impedence on one side of tie breaker and high impedence on second side. IS THERE ANY DRAW BACK?
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Crabtree Guru Join Date: Jul 2007 Location: Commissariat de Police, Nouvions, occupied France, 1942. Posts: 2599 Good Answers: 77	#1 Re: Bus Bar Protection 07/26/2018 7:57 AM
	One of the drawbacks is that your place doesn't appear to have a Senior Electrical Engineer on the payroll. __________________ Good moaning!
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RAMConsult Guru Join Date: May 2007 Location: NYC metropolitan area. Posts: 3230 Good Answers: 444	#2 Re: Bus Bar Protection 07/26/2018 9:12 AM
	The differences have to do with the selection of the protection circuitry and its functioning, and has nothing to do with the high voltage side. __________________ “Tell me and I forget. Teach me and I remember. Involve me and I learn.” Ben Franklin.
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