What is a Shunt?

What is a Shunt? presented by Katie Rydzewski for Galco TV. Buy the items featured in this video at 800-337-1720 or visit: www.galco.com/shop/Busbar-Moun...
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Shunts allow for current or voltage to be measured when the current on a DC line is high enough where it can damage devices directly connected to the line. It is a resistive element that is made of two conductive metals on the sides and then a strap of metal in between made of manganin, an alloy typically consisting of copper, manganese and nickel. The resistive element is placed directly on the DC line in series and provides low enough resistance as to not to impede or disrupt the flow of current, but just enough so that a range can be sampled. The voltage drop across the shunt is proportional to the current flowing through and with the resistance known an instrumentation device such as a panel meter can give an accurate reading in volts or current.
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With respect to the usage, installation or assembly of any products described in this video, Galco Industrial Electronics, Inc., a Michigan corporation, encourages you to follow the requirements and/or guidelines of: i) the Occupational Safety and Health Act of 1970, Public Law 91-596, as amended, and all laws, rules and regulations implemented in relation thereto; ii) the National Electric Code®; and iii) NFPA 70E®. Any installation, assembly or work described in this video should be performed by a qualified licensed electrician.
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[@lukefarmer5391]

Volume control please.

[@steveo984]

I like shunts

[@robviolin1]

Your videos are great and thank you for sharing with us.
Could you please explain in simple terms why a shunt is not needed in a permanent magnet dc motor.

[@GalcoIndustrial]

robviolin1 A permanent magnet motor has the permanent magnet in place to create a static magnet field. The armature voltage and current is all that is required to create rotation. Thus no shunt voltage is required, just the armature voltage.

[@mikes0243]

Thanks. A clear explanation.

[@winstonchurchill8300]

Well done!

[@dalewhitmore143]

Great thanks very much.

[@wasimbaig7980]

i have bothfit fmc plc its some relay burn. how i can repair it?