# Thread: Amps output from a Japanese bullet train....

1. ## Amps output from a Japanese bullet train....

Hello, I need some help with figuring out how many amps that a Japanese bullet train outputs?
A standard Shinkansen (bullet train) uses 25,000 V AC overhead power supply and 1,500 V from a direct current. Is there a way to use these numbers to figure out how many amps it outputs?

2. You can if you can find out the consumption in watts or the resistance in ohms.
For DC:-
Amp = watt/volt
or
Amp = volt/ohm

for AC it's a bit more long winded depending on the phase; plus it's been a while since I've had to think about this... I can remember how to find the wattage for single and 3 phase but for that you need the volts and amps. With any luck someone else with a better answer will turn up or you could try Professor Google.

Good luck and welcome to the forum.

3. thanks for your insights Cake of Doom. I got an answer. "28.75 amps per 600-volt motor" and was able to get a rough estimate based on the number of motor cars each Shinkasen has.

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