The powerline tag has no wiki summary.
3
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2answers
98 views
Guessing power line voltage from the number of disc insulator
Is there a good way to guess the power line voltage based on the number of insulator discs that attach the line to the transmission tower?
Wikipedia seems to suggest that there is a "Typical number ...
-7
votes
2answers
106 views
Send a signal through the powerline [closed]
I would like to what is the easiest and cheapest way of sending a signal through a 110 volt outlet wiring to another outlet on the same phase or on a different phase. I would like to know if a light, ...
2
votes
1answer
148 views
Simple data connection through powerline wires
In my home/office/business I have a 4 incoming electricity lines, (Government line, private subscription generator 1, private subscription generator 2, home gasoline generator)
I want to send ...
0
votes
1answer
131 views
Designing a PoE Circuit
I'm going to buy a PoE injector kit, and I will supply it with an AC voltage, and with ethernet cable, and at the other end I will design a seperator circuit, but however most PoE injectors just give ...
3
votes
4answers
241 views
Is it practically possible to transfer electrical power around the World by wires?
Assume that we installed plenty of solar cells in all continents; mainly in Asia, Africa and America. Can we transfer the electrical power harvested from them around the World through wires? So that ...
0
votes
1answer
105 views
5
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2answers
179 views
power cable: more strands, or bigger strands?
I have two types of 4awg wire to chose from to wire an inverter in my jeep. One of them has about a dozen 20awg wires inside of it, and the other has about 100 super little wires inside of it. Both ...
5
votes
2answers
457 views
How does an inverter affect the computer?
I have rampant power failure in my country. So to mitigate, we have an inverter that basically converts the charge from a big lead-acid battery to AC. But as far as i know this doesn't produce pure ...
2
votes
2answers
189 views
Connections in load flow analysis
I have a very theoretical doubt. I'm trying to fully understand the load flow analysis and its application. So I have a network with about 300 nodes (AC transmission network). Inside every node I have ...
3
votes
1answer
151 views
What are suitable transformer specs to use with LM1893 PLC modem?
I'm trying to learn about PLC (I know the risks), so I want to start with the simplest circuit specified in the LM1893 datasheet to use on 220v AC powerline.
The transformer there doesn't have any ...
5
votes
3answers
951 views
How does DC transmission require several times less wire than AC?
In this YouTube video (scrolled to 5:55) there's a claim that replacing an AC high voltage transmission line with a high voltage DC transmission line allows for having seven times fewer powerlines ...
2
votes
3answers
389 views
Line, Neutral and Ground and another Ground
I try to make a 110VAC energy meter connected to my computer out of the CS5490
This IC measures voltage and current over a voltage divider and shunt resistor respectively and then calculates the ...
1
vote
1answer
118 views
Transients and shielding in power transmission/distribution lines?
I've been lurking for some time on the board here - but hadn't had occasion to ask a question until now:
Does anyone have experience with power distribution networks and their impacts on sensitive ...
1
vote
1answer
265 views
What's the low voltage displayed by a voltmeter when only one of its probes is connected?
Recently I was toying with a digital multimeter and observed the following. The multimeter was set to measuring AC voltage with the upper limit of 750 volts. It has two probes which I will call "red" ...
10
votes
4answers
914 views
Why does electric arc in a switch prefer a curved path over a straight path?
Recently I found this video of a 500 kilovolts line being opened under load.
When the switch contacts are pulled apart an electric arc predictably starts. While the contacts are close to each other ...
2
votes
3answers
255 views
Suggestion for an easy-to-use connector+cable for simple hobbyist sensor project
I'm implementing, as a hobby, a simple data logger. I previously asked a question about running a ~10m cable to the MCU for a Dallas/Maxim 1Wire sensor (and therefore 3 wires, since I'm not going to ...
2
votes
4answers
1k views
Simple power line communication circuit PLC design?
I need simple PLC power line communication design which I could transmit /receive a packet of data through two points ?
Any block diagram with little details will be great for me .
Update :
Data ...
2
votes
1answer
226 views
How is Switching between standard electricity and solar/other electricity achieved?
I'm contemplating various ways of using renewable energy, but I'm also interested in learning more about the subject. At the moment I'm trying to understand a few aspects:
1. How to measure and track ...
1
vote
1answer
152 views
What could be this “transient electric deviation”?
On August 7th, 2011 a lightning hit a transformer powering one of Amazon EC2 facilities in Dublin. The status report said
Normally, upon dropping the utility power provided by the transformer, ...
4
votes
3answers
1k views
Why would a power cable need copper wire shielding?
Today I witnessed burying 10 kilovolt power cable in the ground. I noted the cable mark and Googled it. The description is rather interesting. It's a single conductor cable - it takes three such ...
2
votes
2answers
471 views
Power line communication, how to check if frequency is present
I'm trying to communicate on a power line without external filters (only a filter for the 50/60Hz), because I want to use only digital filters.
My processor is a Cortex-M3 device running at 24MHz.
...
5
votes
3answers
3k views
How would an electric company detect wireless theft of electricity?
As legend goes it is maybe possible to steal electricity from power lines in a wireless way (also see this and this related questions). The legend continues that once someone does that he gets caught ...
1
vote
1answer
1k views
What better options are there than the LM1893 for powerline communications?
I'm looking to build a home automation system which uses the powerline to carry the data between nodes.
I have an old design based on a combination of LM1893, HC123 and 8748, but the slave board is ...
6
votes
2answers
3k views
How to connect 230V 50Hz to arduino analog input
I want to use my arduino to make a simple mains power line voltage wave oscilloscope.
questions:
1. how to connect the mains power line (230V, 50Hz) to the arduino safely and efficient (I think a ...
1
vote
4answers
390 views
Is it okay to use SMT for 250VAC parts?
I've found some 400V 0805 resistors. However, as in my previous question, I noted that almost no power supplies used surface mount components.
One of the things I'm working on is a capacitive power ...
2
votes
3answers
1k views
How do these powerline networking adapters work?
I have some powerline networking adapters which can transfer at a peak rate of 200 Mbps (I get around 60 Mbps typical, but I am sharing the network with many other devices and many pieces of equipment ...
2
votes
2answers
643 views
DC power line communications
I want to send a signal through the DC power lines used in railway compartments.
Can you please help me to do that, or provide some documents or links?
10
votes
9answers
5k views
Injecting a communication signal over DC power supply lines
I'd like to be able to daisy chain multiple devices using just the power supply wires and then inject a communications signal over the power lines to turn it into a half duplex network.
Are there any ...
