...a load far in excess of the factory 20Hr load test. A fully charged Trojan T-125 can sustain a 12A load for 20 Hrs before it reaches 100% DOD (12*20 = 240 Ah). This same fully charged battery can only sustain a 100A load for about 1.25 Hrs (100*1.25 = 125Ah) before it reaches 100% DOD. This...
It doesn't matter what happens when both buttons are pressed as this will never happen
HOGWASH How did you get so lucky to get perfect people??
ALWAYS design so you cannot engage both directions at same time.
itsmoked (Electrical) 2 Nov 05 2:31
abcd3286: Pulling more than the 20hr rate out of LA batteries definitely blasts the total energy available and must be considered.
Yes I know - as submarine electrician I learned early on that if on battery and you want the lights to stay on longer drop the...
I have studied the same questions and read book by Brant - good book. I have looked at only two predictions. Yes they vary but to my surprise not much.
You must remember they are only predictions which fall apart when prototyp or first production unit are tested.
ONe of the difficulties is...
OK here is how it SHOULD be done in modern era.
At service
the GROUND (green) is bonded to the grounding system (stakes water pipe etc).
The GROUNDED (white) aka Neutral is bonded to the ground at the service ONLY.
THIS is the only place they are connected.
All subsequent panels (sub panels)...
OK
supposedly there is no cost for reactive power ie what is required for magnetizing fields (motors etc).
Several people said this is not developed by the engine (or other prime mover of an alternator).
WHY then does
Seattle city light (a utility with a few alternators) tell me they have to...
I believe peak demand is measured in terms of Kw NOT Kw Hr.
The calculation used by utilities may vary by utility.
Seattle City light uses the average of the peak in the last 3 5 minute periods -- I believe.
Now that you got a number for demand the rate can vary by the utility. They can...
240V delta system with the midpoint of one winding grounded. 240V phase-to-phase, all combinations. By usual naming convention, phases A and C will be 120V to ground/neutral and phase B will be 208V.
Phase B is commonly called the wild leg.
I thought the voltage was higher than 208 (wild leg...
Did you solve the problem?
Where do you live? I'd take a crack at it if you are near Seattle.
I think you are going to have to use hydraulics. The cost of course is reduced mileage (battery consumption).
Have some BIG doubts about using another motor as a load.
I would use an alternator (AC) or generator (DC). Use a tank of water with baking soda for a load (place this outside in well ventilated area)
OR use a bank of heaters should keep the shop warm.
OR add another hot water tank and use...
A series motor disconnected from load can (and have) oversped until it throws a winding or other fatal hemmorage.
The only load seen by the motor would be bearing and windage loss.
SO
basically the formula is true.
I had this device pointed out to me recently and found the test report rather amusing. By adding this device, you can get light and power out of a flourescent tube!!
Now do you mean all I have to do is hook a load up to a fluorescent tube and I can make it work?? Thats all I have to do?
If so...
I am curious as to why you want to do this.
What is the practical real world application?
My first thought when I read this was calculating the resistance of bus work.
Dan Bentler
One other thing I forgot to mention.
If engine speed drops too low then voltage WILL drop no matter how good the voltage regulator is.
We started 75 KW feed pump on 250 KW -- 250 VDC diesel gen. The first time we tried it the engine just shut down. We first thought we had stalled it. What we...
I have some thoughts based on 4 years operating electrical generation and distribution on submarine (turbo DC and AC motor and diesel driven alternators / generators)
1. When the transfer switch switches how is load picked up engine NOTE I did not say alternator - on purpose
2. How large is...
