Anti-Pumping Relay vs. Contactor

When most engineer's hearts stop pumping, their careers and education are over.

If you wish to have a career in engineering you must first learn to accurately define and communicate your engineering task. You must then define the environment(s) your engineering task must reside and put your design in an appropriate package.

You've not identified nor communicated what you will pump, what type of pump, how do you power this pump or how you know not to pump. You also placed your question in the Education section of Engineering Careers. Your specific question of choosing between relay and contactor shows so little comprehension of your situation and CR4 organization that I seriously doubt you'd understand the difference between these two similar devices of a relay and a contactor even if I told you.

Now if you wish for us to help you in this design, identify at least the underlined items above. The more information you give us the better. Do not bother to starting a new thread in a correct section of CR4. Just reply here with the added information.

Pssst... www.electrotechnik.net/2009/06/what-is-anti-pumping-relay.html?m=1

i think you are dumb ... if you are really an engineer then u should have knew about that ... before writing such a crap ... although u know nothing about this question ... u wrote a paragraph ... a person should have a common sense .. but u r :(

If you had no any knowledge about that, why u didn't googled it ...

You, who wrote the original question are complaining that I did not perform a Google search for you? You also complain that my paragraph clearly communicated that I did not comprehend your fractured, poorly spelled and punctuated question?

Well I recommend that you take your rude troll ass out of here and go back to your class or mommy. Which ever one is foolish enough to take you.

Please explain your question, with example!

Maybe it's posted in education because it is a homework question. "Plz explain your answer with example."

A relay and a contactor are basically the same thing, except that a contactor usually implies relatively large loads such as motors, heaters, or capacitor banks. A relay usually switches small loads such as control circuits, solenoids, and maybe contactors. Your scheme might make use of both.

Thanks for your ans...

Any electrical interlock is only as good as the individual electrical components that are used to create that system. Traditionally, antipump schemes used contactors/relays. The brilliant designers of low voltage circuit breakers designed mechanical antipumping systems which are far more reliable than the electrical ones. You should study Schneider Masterpact, ABB Emax. i was also involved in the design of such a system for an Indian company.