All Questions
16
questions
-1
votes
1
answer
81
views
How does an AC of 5100W (1.5 ton) capacity work without any issue with 1000W of total electricity load of my house? [closed]
I have one AC of 5100W (1.5 ton) capacity and I generally run it along with other appliances like fans, LED bulbs, TV and more. My house is sanctioned ...
- 139
0
votes
4
answers
4k
views
How to combine wall outlets for higher amperage?
I have a large single phase AC motor that draws 30 amps at 125v. I only have access to NEMA 5-15R outlets (which are rated for 15 amps). However, several outlets are on different lines (different ...
- 51
1
vote
1
answer
1k
views
How bad is it to momentarily overload a transformer? [closed]
I have an espresso machine from the US running on a transformer in the UK. Inside the machine there is a grinder, a pump, and some heating elements. The machine is labeled 120VAC 1150W.
I have it ...
- 111
1
vote
0
answers
840
views
Correct way to build a load lamp setup for circuit testing
I have a 3 way extension lead that I would like to use to stick it in the wall, put a load lamp (40W oven lamp) in series with it, and then use one of the prongs to insert my circuit under test. (the ...
- 753
0
votes
0
answers
152
views
Triac Switching Circuit
I will switch an ac load with a triac. I am providing a dc voltage of 5V on the gate of first Triac and 0V on the gate of second Triac. In the first picture the triac is working and the switch is ...
- 11
4
votes
4
answers
475
views
Question about ideal transformers and inductors
Recently I was studying about alternating currents and transformers and I got confused about some of the concepts. I tried a lot of sources but none of them seemed to address the problem.
I ...
- 215
0
votes
0
answers
54
views
How to calculate R for an AC load on a 3-ph system
I'm trying to calculate the resistors in an AC dummy load for a 3-ph system.
A simplified schematic can be found below. The idea is to switch (with regular AC 1-ph contactors) some resistors on each ...
- 445
0
votes
1
answer
108
views
Building a numeric potentiometer for AC current
I'm building a bench to calibrate a device that measures AC currents. As I won't build something accurate, the current will be measured with a current clamp and a multimeter (voltage mode).
For the ...
- 489
0
votes
0
answers
33
views
Problem with AC powered system
I have a system (car simulator) which is powered by a 220Vac 60Hz. Within the system there are 6 switched sources, 4 of 24 Vdc, 1 of 12Vdc and 1 of 5Vcd. Loads 1,2 and 3 are dc motors 24vcd. Loads 4,5 ...
- 583
0
votes
4
answers
1k
views
Transformer output voltage calculations using load current
I can't find formula for this. I have rated load current, acutal load current, rated output voltage and variability of output voltage (given in percentage).
How to find no-load output voltage and ...
- 493
0
votes
1
answer
1k
views
A question about very simple light Dimmer circuit?
I've learned that a Triac works as a switch for controlling AC current. Why not connecting the load (L1) and Triac in series? at the position of red arrow? My reason is that a small amount of current ...
- 3,814
1
vote
0
answers
674
views
Can I use a capacitive divider to run an AC/DC converter from a higher voltage than its rating?
Suppose I have an AC/DC converter rated to run from 120-240VAC, and I want to run it off 480 VAC. I think I should be able to put two capacitors in series as a voltage divider, and run the converter ...
- 17.6k
1
vote
1
answer
337
views
AC voltage source - variable load
I'm looking for some kind of idea for controlled load for AC source testing. The output signal of source is a bipolar sine wave 5 Vpk (so it varies from -5V to 5V) and it has 1.5kOhm series resistance....
- 104
2
votes
1
answer
77
views
Power management at thermal power station
I have weird question, but I hope somebody can give at least hint what should I read to understand the concept.
Imagine situation:
There is thermal power station and a city that takes power from it....
- 1,216
0
votes
1
answer
693
views
Power opamp 'floating' output
So I had to design an amplifier with a 'floating' output. (I don't know if floating is the right word, it's the direct translation from dutch.)
See the picture below ( I drew it whilst sitting in the ...
- 408