Basic Impedance question
Basic Impedance question
(OP)
How do I determine an impedance/resistance value (please correct me if I'm wrong) for a circuit (any voltage) such that I don't get a short circuit?
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Basic Impedance question
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Basic Impedance questionBasic Impedance question(OP)
How do I determine an impedance/resistance value (please correct me if I'm wrong) for a circuit (any voltage) such that I don't get a short circuit?
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RE: Basic Impedance question
What impedance determines is if you do have a short circuit, how bad it (short circuit current)could be. It is not something you intentionally insert (except for very rare cases..not the subject here)to avoid the accident.
RE: Basic Impedance question
can you direct me to any electrical eng. formulas?
RE: Basic Impedance question
Given a car starter is something close to a short circuit, the cable is sized to prevent overheating in the time it is intended to be active.
RE: Basic Impedance question
I hope this is what you were referring to with your question.
"Throughout space there is energy. Is this energy static or kinetic! If static our hopes are in vain; if kinetic — and this we know it is, for certain — then it is a mere question of time when men will succeed in attaching their machinery to the very wheelwork of nature". – Nikola Tesla
RE: Basic Impedance question
Your first (original) question was not technically accurate, meaning you cannot have a circuit which will not get you a short circuit. The first line in my first response was a sarcastic statement.
Your second question is too broad to get you started in a right direction. You need to start with some very basics, such as google "basic short circuit calculations", it wil throw up many links. Some more complex than others. See any of them make any sense to you. If you are confused, I would suggest you leave electrical issues to electrical professionals.
May be you can narrow down your question to the specific situation you have at hand, rather than trying learn something that can get very complex very quickly.
RE: Basic Impedance question
Your question is a bit vague for more information to be given. If we knew what or why you were doing we could respond better.
RE: Basic Impedance question
i'm a mechanical engineer. I know basic electrical concepts like most engineers, but i am increasingly interested in learning more. Can you recommend a good web site where I can learn more?
thanks again for your post.
Steve
RE: Basic Impedance question
RE: Basic Impedance question
When you do a short circuit study you have to include some factors that you normally would not consiter, like source impedance (impedance of batteries, or generators), and impedance of ground (normally consitered near zero).
If I knew a good reference, I'd give it to you, but I don't have one.
RE: Basic Impedance question
I do not know of a website that will teach you electrical short circuit calculations, as it has so many variables.
If you really want to get started on a right footing (and dealing with 3 phase AC circuits), you need borrow or buy some good books. You will still need a good electrical engineer's help to understand those.
You can start with IEEE Red Book and IEEE Buff Book. Look up at www.ieee.org. Unfortunately there is no free lunch.
If you are in USA , you can try public libraries (of a good size City). They may have older versions of these books. I had found them in the past.
If you are more serious, take some technical courses on the subject. University of Wisconsin offers good seminars/courses on such subjects.
RE: Basic Impedance question
http://www.allaboutcircuits.com/vol_2/index.html
The sites are easy to find if you just type in what you are looking for. A lot depends on what exactly you are looking for, how basic do you want? You can download courses from a lot of colleges also.
RE: Basic Impedance question
perfect! just what I was looking for.
thank you
steve
RE: Basic Impedance question