Electronics Forum / Electrical Engineering / January 2007

I am starting now a project and I need Ur help
I will collect all electrical pictures and upload them to the
Internet
and gather them in groups

I am trying to test a generator that has a boost feature that uses a 12V
battery to provide an extra 500 watts of power when needed for 10 seconds
maximum.  This is a Yamaha EF3000ISEB.
I question whether the boost feature works or not on the one I have.  The

I'm not an engineer or close to it so, here is a question for you pros.
Let's say I have an appliance designed for use here in the US on 120 V,
60hz.  This appliance draws 500 watts (It's a heating element)
I move to Germany where they have 240v 50hz

How would you go about stealing the images for a sevurtiy camera. If
some one was taking the images from you security camera would they be
taking it from the camera or the switch box or just  what would they be
doing? I have 4 security cameras around my house and I run them when

The Human Skin as "An Engine"
[ Biology / Chemistry / Physics / Machine Science / Computer Science /
Neuroscience / Computer Systems Engineering ]
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I need to deliver a variable current between 0-2 Amps to a small load
(15 Ohms).... At first I was thinking about building a current
amplifier..... but after investigating that route again, i think, it's
too difficult to build.

We have a situation where a customer needs to put three single-phase,
50 KVA pole mounted transformers into a three-phase bank.  The voltage
of each transformer is 13800-277/480Y.  Two of the units have an
impedance of 2.9%.  The other unit has a 1.6% impedance.

I'm working on understanding an example problem in order to do a homework
problem, but it does not explain things well.
It asks to sketch the voltage as a funtion of time at x = 100 meters
V(x,t) = 100 cos (10^6t - 0.0628x) volts

My datalogger is for 600VAC maximum, but sometimes my source is higher
like 630V or so or maybe higher on malfunction or other problems. I
would like to build a resistive divider to reduce the input to the
logger by a 2:1 ratio. I can easily adjust the PT ratio in the

I have a 60Hz AC voltage comming from a transformer 120/220V that
powers some cooling fans, but it's got some spikes at the output, and
Im having problems with that. The spikes are burning the fans.
Here is the link of the wave form: http://br.geocities.com/suellemtosi/

Can anyone tell me what proportion of Electricity generated at power
stations is actually delivered to the consumer?
I heard on the radio that 80% of electricity generated is lost in
transmission losses.

In connection with a research project, I am soliciting opinions
within the engineering community as to the definition of the
term/expression:  <through-fault> or <through fault>.
Please post your responses.

Is this going to work?
My sister lives in a remote area.  I jokingly tell people that they
haven't had electricity too long.
I truly don't think she will ever have anything other than dialup.

I've a fan/motor from a residential air handler, the wires have been cut
there are four of them - can some tell me how it should be wired.  Here's
what I know...
Manu - Westinghouse

Could someone please tell me how i go about testing a  single phase ac
motor with external capacitors by using a mega or a multi meter. The
motor is being used for a swimming pool pump and i want to check if
its faulty.