# Measurement of voltage and current

1. Apr 7, 2014

### Young Learner

Is there a way in electrical engineering where I can convert
230 KV to 5 V such that the 5 V wave has same amplitude, phase and frequency as that of 230 KV.

2. Apr 7, 2014

### 2milehi

That is very high voltage - don't even think of getting within 30 feet of that high of voltage.

3. Apr 8, 2014

### mr_pavlo

If it had the same amplitude it wouldn't be 5V but 230kV.

4. Apr 8, 2014

### meBigGuy

I assume by "same amplitude" you mean that any amplitude variation in the 230KV would show up in the 5V. For example, maybe you want to build a regulated tesla coil so you use a pickup loop to monitor the high voltage and keep it constant.

Anyway, down conversion of 230Kv AC is done by transformers. Huge power stations convert 230KV power lines to usable voltages. A pickup coil near a transmission line could produce 5V.

Can you be more specific regarding what you are trying to do?

5. Apr 8, 2014

### Young Learner

I was trying to make a paper on synchronizing alternators. If I can monitor the amplitude phase and frequency of two generators, then I thought that I could synchronize them using a differential amplifier or a simple logic gate.
For amplifiers and gate to work I wanted a low voltage waveform which is analogues to high voltage of the transformers.
All I wanted was a low voltage waveform which changes simultaneously according to the high voltage waveform so that I can use it for synchronizing purposes.

6. Apr 8, 2014

### Young Learner

Ah! that shows my ignorance.
I meant the low voltage wave must vary in accordance with the high voltage wave.

7. Apr 8, 2014

8. Apr 8, 2014

9. Apr 8, 2014

### psparky

Everytime you plug your phone into the wall you get 5 volts into your phone.........that was once 230KV running down the powerlines. Only difference is they convert to DC....so just skip the rectifier in the last transformer.

So yes, very possible to convert since done all day, every day. (assuming different amplitude, obviously)

Multiple tranformers at specific points will do the trick.

10. Apr 8, 2014

### Young Learner

That is fine. But the thing which worries me is the cost.
Approximately how much will it cost to step down 230 KV to 5 V.

11. Apr 8, 2014

### jim hardy

12. Apr 8, 2014

### psparky

Last edited: Apr 8, 2014