Diode Connection in Circuit Tripping Path - CR4 Discussion Thread

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Anonymous Poster	Diode Connection in Circuit Tripping Path 12/04/2009 4:25 PM
	I have noticed that when a single contact from a protection relay is used to fire into both a trip relay and an indication relay, a diode is always included in the tripping path, can anyone please explain the theory behind the diodes
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Anonymous Poster	#1 Re: Diode Connection in Circuit Tripping Path 12/05/2009 3:44 AM
	Look here. http://www.youtube.com/watch?v=YOXCAKL9ESc
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rasam.syamsudin Commentator Join Date: Dec 2009 Location: Jakarta 12130 Indonesia Posts: 76 Good Answers: 1	#2 Re: Diode Connection in Circuit Tripping Path 12/14/2009 1:18 AM
	Is it a diode installed across the coil terminal on DC system? If it is OK, the diode function is to circulate a current from the the dc coil due to a high voltage occured during switching off. Without this diode it may disturb electronic equipment being operated due to spike voltage during de-energizing coil. Sorry if it is not related to this subject. __________________ RSM Elect Specialist
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