Recent content by srinaath

Thanks @.Scott quick clarification though - do we even see arcing in resistive load?

Arcing in a contact occurs due to open and close action of the switch. I am curious if the arc intensity depends on the type of load. For example the arcing (arc intensity) due to induction load will be greater than arcing due to resistive load?

I have a elctromechanical contactor (contactor is an electrically operated switch - It is larger version of relay) which has following specification, Inductive full load current - 30A Resistive full load current - 40A Why is rated inductive current less than rated resistive current?

I came across a contactor catalog saying "Definite purpose". Then tried to figure out the types of contactor. Came across definite purpose and general purpose. What is meant by definite purpose contactor and general purpose contactor? On what basis can i choose definite purpose?

I am trying to understand the working of simple hydrogen fuel cell. We have anode (negative terminal), cathode (positive terminal), catalyst at anode to separate negative and positive ions of hydrogen atoms and electrolyte which allows only positive ions. We will be sending hydrogen fuel at...

UL508 I am trying to find the temp rise of a transformer

in accordance with UL standard, there are two methods to detect temperature rise of a device, 1) resistance method: (involves detecting resistance of the coil) 2) thermocouple method: (directly measuring the temp using sensor) I just wanted to know which method would be preferable and why is...

Thanks Tom, cwatters, asymptotic and Rive for your valuable explanation.

There are 2 types of temp rise measurement for electrical devices, 1)resistance type 2) thermocouple type (direct measurement) My query is 1) which method is superior and please explain me the reason. 2) Which gives higher value of measurement? Thanks in advance.

I read online that insulation rating of the conductor depends on the voltage rating and not on the current. Can some one explain me how current doesn't contribute to insulation rating? Am i missing something? Kindly explain me

hello anorlunda, thanks much for your reply, i am planning to transfer a power of 2W over a distance of 10cm so, can you suggest me any technique to make it as a high power oscillator?

i am planning to do a small diy wireless power transfer device. The circuit of the transmitter is receiver has just the coil and load arrangement. my query is, (please correct me if am wrong) -->to induce a voltage in the secondary coil, there must be a varying magnetic field right? -->but...

Homework Statement What are the effects of changing the speed of alternator? (elctrical synchronus generator) Homework Equations Ns=120*f/p; p-poles f-frequency Ns-synch speed E=4.44*f*phi*T phi-max flux linkage T-turns f-freq E- generated voltage The Attempt at a Solution from the above...

wow...that was a superb and lucid explanation...thank you @jim hardy .

I have doubt here... my relay spec sheet for the above one says something like this... NEMA pilot duty rating i did some little research in internet and found that make current means pilot duty inrush current and break current is steady state current.. A represents 1 HP and B represents 1/2...