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m.kumar
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Join Date: Nov 2011
Posts: 19

Electrical Overhead Crane

12/11/2017 12:48 PM

how this crane hoist rectifier works.please explain.where is the a/c input and where is the d.c out put and how it is rectifying the a/c supply?i have added the schematic diagram.
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Pathfinder Tags: crane hoist brake rectifier
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lyn
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#1

Re: Electrical Overhead Crane

12/11/2017 2:04 PM

Rectifier Circuits | Diodes and Rectifiers | Electronics Textbook

How to Read Schematics: 5 Steps (with Pictures) - wikiHow

Click on this⇓

learn.sparkfun.co
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JRaef
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#2

Re: Electrical Overhead Crane

12/11/2017 3:06 PM

That rectifier appears to be for the BRAKE on the motor. In that situation, the Brake has a DC coil inside that energizes to RELEASE the spring-loaded friction brake whenever you run the hoist motor. Then when the motor is turned off, the brake coil is de-energized and the springs inside of the brake apply it to the shaft to stop the hoist. That makes it inherently fail-safe in that if the line power is lost, the brake SETS, so the hoist does not drop the load on someone.

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Ivanov327950
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#3

Re: Electrical Overhead Crane

12/12/2017 1:27 AM

The picture is very bad quality. You should try to attach the original file in a graphical format.

Moreover, you should know that different locations use different representations of schematic symbols. Have you thought that some information about it could be helpful?

I believe the rest of the thread will go about your question regardless from the image you attached.

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Oomborrie
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#4

Re: Electrical Overhead Crane

12/12/2017 1:48 AM

m.kumar, the repair personel on lifting and hoisting equipent are regulated all over the world because a lack of knowledge may result in the death of innocent people. It worry me that you are involving yourself in this industry and you can not even read the most simple of diagrams and need direction on AC and DC in this simple diagram. Venturing into repair or maintanance on this piece of equipment by you are highly illegal. Get qualified personel to solve your problem.

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James Stewart
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#6
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Re: Electrical Overhead Crane

12/12/2017 2:23 PM

You tell him, brother!

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PWSlack
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#5

Re: Electrical Overhead Crane

12/12/2017 3:48 AM

A simple to the equipment supplier will answer that question and many more.

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