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1. ### 3 phase 115VAC 400hz supply requirement, but what is the power requirement in Watts?

1.73 * 115 * pf(=0.9) * i = w

2 Answers · Science & Mathematics · 27/03/2016

2. ### What do you mean by Power Grid Collapse?

..., get slower as they struggle to provide power - the grid will get out pf phase and frequency. The worse it gets and the generators...

3 Answers · Science & Mathematics · 22/09/2015

3. ### I have a ceramic capacitor that says on it 101, is that 0.1uF? how can I tell? thanks!?

...bit short. Ceramic caps are almost always labelled in pF, and have a three-digit-scheme similar to resistor bands. The first...

2 Answers · Science & Mathematics · 29/08/2015

4. ### Has a 1A current at 1V at 60Hz more watts than 1A current at 1V at 50Hz?

... of L) + (-X of C)] Watts = (V)*(A)*(pf) = (1V)*(1A)*(R/Z) and Z may increase with frequency...

7 Answers · Science & Mathematics · 09/08/2015

5. ### If machine's current consumption is 25A (3 phase), what size of multi-conductor will be chosen?

...correction due to length. Although AWG#10 appears adequate, at PF .9 you have 27.5 Amperes, and you can't load any conductor beyond 80%. ...

3 Answers · Science & Mathematics · 18/07/2015

6. ### Diode: Unsure how to draw circuit diagram for high wave rectifier?

Drawing.....assume current is not more than 1A.... 230Vrms ---> switch ---->fuse ----> step down transformer into 9Vrms ----> full wave rectifier ---> filter capacitor 2000uF ---> regulator LM7805 circuit ----> a small current 5V bulb (pilot lamp...

2 Answers · Science & Mathematics · 07/07/2015

...4.5 A Irms = I av*2*√2/2 = 6.35 A Imput pf = Pdc/Pac = 4.5*45/(6.35*100/2) = 0.64

1 Answers · Science & Mathematics · 17/04/2015

8. ### Electric ac circuit calculations?

...3,000 VA Z = V / I = 200 / 15 = 13.33 ohm power factor, pf = W / VA = 2800 /3000 = 0.933 = cos(theta) theta = acos(0.933) = 21...

1 Answers · Science & Mathematics · 08/04/2015

9. ### How to Siphon water up 3ft Vertically with no Pump or Suction device.?

IF you have a choice of containers - put steam in a 5 gallon bottle container for the top and it will suck the water up through the tube as it condenses or put the water in such a container in the bottom and pump up air pressure.

3 Answers · Science & Mathematics · 04/04/2015

10. ### voltage at the sending end.?

i think there is a mistake on typing.....a 4.6 kw load... p= v i pf 4600 = 230 i 0.8 i = 25 A resistance part of load voltage = 230 x 0.8 = 184 v...

1 Answers · Science & Mathematics · 29/12/2014