Thermal Magnetic Release in Circuit Breaker

4 comments

Muthuvel Power-User Join Date: Jun 2012 Posts: 115	Thermal Magnetic Release in Circuit Breaker 02/25/2013 1:01 AM
	In circuit breaker to operate thermal release Bi-metal is used to trip In same manner what we are using in the magnetic release.
	Register to Reply
	Pathfinder Tags: Thermal magnetic release..

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Paulusgnome Power-User Join Date: Oct 2007 Location: Christchurch, New Zealand Posts: 328 Good Answers: 29	#1 Re: Thermal magnetic release in circuit breaker 02/25/2013 3:56 AM
	A coil and armature. __________________ paulusgnome
	Register to Reply Score 1 for Good Answer

Muthuvel Power-User Join Date: Jun 2012 Posts: 115	#2 In reply to #1 Re: Thermal magnetic release in circuit breaker 02/25/2013 7:16 AM
	So IDMT relay is inbuilt in the circuit breakers?
	Register to Reply

JRaef Guru Join Date: Sep 2006 Location: California, USA, where the Godless live next door to God. Posts: 4665 Good Answers: 804	#4 In reply to #2 Re: Thermal magnetic release in circuit breaker 02/25/2013 6:18 PM
	"So IDMT relay is inbuilt in the circuit breakers?" No. In IMDT implies a delay, the magnetic trips in a Thermal-Magnetic circuit breaker are intended to be instantatneous. It's a simple mechanism, basically the conductor path is coiled to product an inductor, and a metal plunger is fitted inside of the coil and held in place with a spring that has a specific amount of mechanical force. If the current increases slowly, the plunger barely moves because normal curent flow does not produce enough force in the plunger to overcome the spring force. But if there is a short circuit to where there is an extremely high and rapid increase in current, the plunger thrusts forward with enough force to overcome the spring and hit the trip mechanism. There are of course, many variations of this theme. __________________ All I every really wanted to be, was... A LUMBERJACK!.
	Register to Reply

PeterT Guru Join Date: May 2010 Location: Liverpool, NY Posts: 961 Good Answers: 131	#3 Re: Thermal magnetic release in circuit breaker 02/25/2013 8:02 AM
	The magnetic trip is usually an instantaneous trip function for short circuit. __________________ To get the right answers, first you need to ask the right questions.
	Register to Reply

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Copy to Clipboard

JRaef (1); Muthuvel (1); Paulusgnome (1); PeterT (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (43 right now) Show Members