Closing/Opening Velocity of Vacuum Interrupter

Try here: formula

Let us know how it works out for you.

I think u have not uderstood problem .

I was asking about vacuum interrupeters which are used in breakers & moving electrode is connected to drive rod mechanism to open & close operation of breaker.

Interruper moving electrode physically pulled on utm & can find out the howmuch pulling force is requierd,but it is not so acuurate .so want any formula or other method for the same.

I would have rung them long ago, Boss.

Your question is confusing. You talk about velocity, then want force.

I understand your problem.

What makes you think there is a formula for this?

I'm constantly amused by minds that think everything can be solved by a "formula". Life just doesn't work that way

Measure it.

Berkley 50lb Fish Scale W/Tape

Most interrupter manufacturers provide preventative maintenance manuals that can be purchased or are provided at no cost to the customer.

Some of these manuals provide the information that you are looking for.

The only way you will be able to obtain the correct values for "The pulling force required" your particular interrupter requires is by contacting the original equipment manufacturer. (OEM)

Some of the reasons are: "The pulling force required" is a function of interrupter design that is based on contact size, contact metal type, opening distance, vacum strength, mechanism bearing resistance, type of bearings, and fulcrum angles of the operating mechanism.

You are trying to reverse engineer a very specialized complex mechanism. Manufacturers spend years perfecting and commercializing their design and are very unlikely to share this intellectual property without NDAs (Non-Disclosure Agreements).

You might be able to get some clues by reviewing the main manufacturers' commercial literature as well as IEEE, CIGRE, and others' papers on the subject. There's plenty available by Googling.

The link provided by SolarEagle is very good, you may want to read it to get an idea of the complexity of making a VCB or Vacuum Contactor after buying bottles form someone.

There are some other vry good articles from Eaton (Westinghouse) also. Here is a link :

http://ece.uprm.edu/~lorama/BR01306001E.pdf

i say again, this is a complex task, and you should think twice before venturing further. Good luck.

can u pls send some thing details about the graph or link where i can see basics

Have you not downloaded the article given by this link (which i have quoted above)? It gives a lot of the information that you want :

http://ece.uprm.edu/~lorama/BR01306001E.pdf

The graphs etc are from an excellent article here :

http://www.electricalpartmanuals.com/pdf/circuitBreaker/Cutler-Hammer/Vacuum%20Interrupter/VITM9914.pdf

Please download them (also the one from SolarEagle) and study. They are very educative,

As fast as possible. What are you trying to do here? last week it was force this week its speed, there is not a formula for everything you know. Think for yourself.

There is little bit confusion from my side in replying because i have posted both the question on same day. I think no body is experts in all area , I believe in sharing the knowledge so people should not waste the same time in reinventing the wheel which i would .

Anyway if you have any idea about my both question pls reply

This table appears in the Eaton paper i referred to...gives both closing and opening speeds for various applications, for the Westinghouse bottles. If this is not readable, download the paper and study.

Thnks sir, I know this but i want how did they decide the velosity for each VI type & is there any formula or any criteria to calculate the velocity????????

The curve shown in my earlier post, and the article i have given a link to, explain how the optimum speeds are arrived at from experimentation. This is how most original R&D is done. Alas, there is no short-cut. Blood, sweat and tears are required. Cannot be done on your desktop i am afraid.