Questions tagged [lightning]
The lightning tag has no usage guidance.
69
questions
0
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0answers
15 views
lightning current with isolated cable
I am trying to understand what happend when designing a lightning protection system using isolated cable (with specified separation distance, lets say in this case with 0.5m).
Following IEC 62305 I ...
0
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0answers
34 views
Using current divider to see how much current goes inside the plane when lightning strike
I am working on a project that requires me to understand how engineers do current analysis. The aircraft has a metallic body which provides a path for lightning when it strikes but what if there is an ...
0
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1answer
23 views
I am failing to understand the difference in Impulse Sparkover voltage vs DC Sparkover voltage of GDT
Lets say I want to use a Gas Discharge tube for indirect lightning protection, and I have a tvs diode in parallel with GDT. Since this is indirect lightning and has a fast waveform, should the tvs ...
0
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0answers
31 views
Anyone hear of GMOV - Metal Oxide Varistor in series with Gas Discharge tube
I am currently working on protecting the Network switch. The network switch is powering a camera outdoor. I have read through multiple tvs components, and found advantages and disadvantages. Until ...
0
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0answers
21 views
How do I calculation to see if Thyristor complies with DO-160G indirect lightning protection
I have been working with TVS diode and found that the capacitance of tvs diode is large; therefore, I will not be able to use tvs diode.
Thyristor, on the other hand, has low capacitance for high ...
0
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1answer
46 views
DO-160 indirect lightning requirement confusion
I am looking at many tvs diode online, and I wanted to know how to calculate to check if it complies with DO-160 indirect lightning surge protection.
For DO-160, there are Waveform 3, 4, 5A&B, ...
0
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1answer
58 views
Lightning Surge Protector that complies with DO-160. Indirect lightning waveform, Gas Discharge tube or MOV in parallel with tvs
Would it be wise to put Gas discharge tube in parallel with tvs diode?
OR
Would it be better to put MOV in parallel with tvs diode?
Also when deciding on tvs diode, how does indirect lightning ...
1
vote
1answer
111 views
A TVS for lightning surge protection
A camera will be mounted outside and powered via POE to Aruba 2540 network switch. I don't want indirect lightning surge to travel into the network switch. I don't care if the camera gets destroyed.
...
0
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1answer
64 views
Best sensor to measure light intensity in open room
I am working on a project to understand how robot localization is effected by light levels. I am wanting to build a circuit which can be mounted on a small robot near the camera and can determine lux ...
0
votes
1answer
96 views
Supercapacitor based lightning-harvester [closed]
Could lightning discharges be harvested and stored in supercapacitor banks? Could supercapacitors withstand and collect lightning?
Lightning usually lasts for about 10 micro seconds and reaches ...
0
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0answers
40 views
Ballast Power Draw
I am trying to calculate the current draw for 6 florescent bulbs and ballasts. There is one ballast per 36W bulb.
I know that the current draw for each bulb would be 36/240 =0.15A (0.6A total)
How ...
6
votes
4answers
913 views
Is it possible to measure lightning discharges as Nikola Tesla? [closed]
Nikola Tesla stated in his patent, Art of Transmitting Electrical Energy Through Natural Medium, that he used sensitive instruments to measure lightning discharges:
In the course of certain ...
0
votes
1answer
161 views
Lightning protection for TV Antenna
I live in an area with frequent lightning strikes. Occasionally people get killed due to those - specially when strikes enter house through TV antenna cables. My house is quite tall and seems to be ...
0
votes
1answer
32 views
Replacing lightning connector with usb-c connector in lightning earphones [closed]
I have a lightning earphones, Sennheiser ambeo smart headset.
https://en-us.sennheiser.com/finalstop
The cables are yellowing, and I wanted to replace them, also I got tired of using this on my ...
0
votes
0answers
223 views
Earthing for Satellite Dish
A friend who is an electrical engineer (heavy current) told me to earth my satellite dish and its fixing pole against lightning, using a thick copper cable (6 sq.mm) and an earth spike. He also said ...
0
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3answers
196 views
Voltage, inductance & lightning in a length of wire
I initially got the idea after watching the famous Mike Holt video on grounding.
https://www.youtube.com/watch?time_continue=138&v=mpgAVE4UwFw
Mike warns that longer wires to ground rods can ...
0
votes
2answers
170 views
Does a ground strap protect my car from a lightning strike?
I was wondering if the ground strap can also protect the electrical/electronic parts of a car when a lightning strikes it.
0
votes
1answer
191 views
Is 3.5mm jack to female Apple Lightning adapter technically possible?
I couldn't find a trustworthy source for whether Apple EarPods are digital or analog, but I'm pretty sure it is digital as most teardowns show a chip on it that might be a DAC. Should this make ...
0
votes
1answer
66 views
Lightning protection system [closed]
When I have a lightning protection system installed on a building roof top , what is the best way to bond the electrical equipment on the roof? Is it ok to directly bond it to the down counductor of ...
1
vote
3answers
223 views
Can lightning damage electronics via a ground connection?
Often when we think of a lightning transient, the idea is that the lightning strikes a power line and propagates through the hot/neutral or 3 wires of 3-phase system. There is also induced current ...
0
votes
2answers
47 views
How does the chassis ground on an automobile protect against lightning
How does the chassis neutralize the excess of electrons from a lightning strike?
6
votes
1answer
120 views
Sparks on grounded metal bodies on lighting strikes in the nearby (two miles)
I have a strange phenomenon in our mountain cabin, on the Italian alps: lightning strike on the nearby (not so near: < 2 miles) causes audible / visible sparks on:
electric / fire wood water ...
0
votes
1answer
74 views
A question about lightning protection for a sensor mounted outdoors
There is an ultrasonic-windsensor which will be mounted on a bridge in winter. Maybe several of them.
It seems like for outdoor use this device should be earth grounded(probably through mains earth? ...
2
votes
2answers
731 views
Why does lightning hit a plane when it's not grounded?
The title is the question. Is it something to do with batteries on a plane? I’ve tried Google but all the listings are “what happens when lightning hits a plane”
So why does it happen I want to know?...
-2
votes
2answers
3k views
How to make the lightning port of iphone output 5V power? like OTG on android phones [closed]
How to make the lightning port of iPhone output 5V power?
How to make the lightning port of iPhone output 5V power?
Just like the android phone, if I connect the ID pin to the ground then the phone ...
0
votes
1answer
130 views
Question about ESD wristband and lightning
as far as I know all ESD wristband's ground connection has an 1M ohm resistor built in for safety. So what would happen if I am working on lab wearing ESD wristband which is connected to the home ...
0
votes
1answer
50 views
Are there disadvantages to this method of testing building wiring after a lightning strike?
A lightning strike can damage wiring in a building. Specifically it can damage the insulation on the conductors, resulting in arcing and fire, either immediately or some time after the strike. I've ...
5
votes
2answers
258 views
Identification of a part on a power line's lightning arrester
I recently spotted an arrangement of wires on a lightning arrester on top of a power line. The power line is IIRC a 110 kV, 16.7 Hz, two phase line for railway systems.
The lightning arrester is of ...
0
votes
2answers
208 views
Automatic cut mains power on a thunderstorm
I am a software engineer with only a basic experience with electric/electronic engineering.
I live in a rural area subject to thunderstorms, my house is the end of the line from street poles. It's ...
0
votes
2answers
174 views
How does a neutral wire add any protection from near-by lightning strike
As an amateur radio operator for 60 years now I have been aware that a major worry vis-a-vis lightning is not so much the very rare "direct hit" that blows up the house, but the far more common "near ...
2
votes
2answers
285 views
Lightning protection for underground loudspeaker wires
I am tasked with running a loudspeaker to a remote building. The total run length is around 275 feet, with the outdoor portion being around 165 feet. The cable is Cat5e 24awg unshielded, silicone ...
0
votes
2answers
82 views
detection of dc pulse
following is a pulse which i obtained from a circuit and i want to get a count when the pulse is initiated. My circuit is to detect a lightning and i obtain this pulse in our high voltage laboratory ...
5
votes
2answers
3k views
How to add lightning protection on a PCB?
Currently, I have the PCB design ready, and I want to add lightning protection to the PCB. Can someone suggest a good, low cost solution for it? I am new to adding lightning protection.
One of the ...
0
votes
2answers
312 views
Lightning Rod Hack By Using Satellite Dish
Our condos' rooftops don't have lightning rods per se, but they do have satellite dishes and AC units mounted there as well. Would these, if properly grounded (and these should be) act as lightning ...
0
votes
1answer
44 views
Radio Noise from Storm
I drove through a Wyoming thunderstorm today. Just for fun, I set my AM car radio to the top end of the AM broadcast band where there was no station audible. Sure enough, I heard the lightning ...
2
votes
3answers
148 views
Lightning detection
I am planning to build a device that has a capability of early detection of a lightning. Also we want to measure the magnitude of the lightning and can anyone suggest a way to measure the magnitude of ...
0
votes
3answers
2k views
What could happen if a lightning strikes a car with a battery connected to the chassis ?
I was wondering today what could possibly happen if a lightning strikes my van where I have a 12V battery negative connected to the chassis. Could that destroy the battery or start a fire?
In order ...
1
vote
1answer
146 views
Can overhead ground wire of major transmission lines prevent induction through solar storms?
As I understand it the overhead ground wire found on major transmission lines is placed there in the event of a lightning strike which prevents a surge in the phase conductors. My question is, could ...
1
vote
1answer
104 views
How to initiate a Lightning connection
I'm trying to take the first step to establish a connection with an iPhone using the Lightning port. I'm using the Lightning A male connector body, which I believe should set the iPhone to be a USB ...
0
votes
1answer
128 views
ESD damage due to earth potential drop?
When lightning strikes or the earth wire (from the wall outlet) suddenly gets charged negatively for whatever reason, then, in theory, can it cause ESD-damage to a PC?
Because the grounding wire (...
0
votes
1answer
395 views
Known alternative to DMX512 & RDM
Hi does anybody know of any other lighting communication protocol other than DMX512 and RDM?
I'm currently evaluating protocols and would not want to miss potential candidates.
Thank you.
0
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1answer
178 views
Neutral for 3 phase machines
When do we have to use a TP circuit breaker, and when do we have to use a TPN breaker, and why?
I am specifically referring to 415 VAC 3 phase, 230 VAC in single phase, 50 HZ.
2
votes
1answer
259 views
How the lightning arrestor works in an aircraft?
The doubt may look silly. I referred the article about this in http://www.scientificamerican.com/article/what-happens-when-lightni/
It says that the current will exit through some extremity like tail....
0
votes
1answer
378 views
Can you safely use the telephone during a lightning storm? [closed]
Everyone's heard the lecture on how you shouldn't use the telephone in a storm unless it's an emergency, due to a risk of electrical shock. My understanding is this is true and numerous people have ...
1
vote
2answers
889 views
Connection to ground for a Cat5e Shielded outdoor rated cable
My ISP installed the cable modem in my entertainment room. I am trying to have internet also in my STUDIO with an access point to broadcast a second WIFI from there to other parts of the house. (My ...
0
votes
1answer
82 views
What are some disadvantages of having exposed pins on a connector?
For example, the Apple Lightning connector has exposed pins. What are some disadvantages of exposed pins besides corrosion (and shorting out the power supply when not in use, which shouldn't be a ...
-5
votes
2answers
1k views
Electrical Engineering Puzzle [closed]
I encountered a puzzle for which I'm sure of the answer. It's simple:
Which cow will survive? Why?
Assume that single strike of lightning is 10^20 electrons.
1
vote
1answer
387 views
thin wire on high tension cable
if the thin wire is use for protection from lightning strike in high tension tower, then tell me that how a thin wire can withstand a high voltage lightning strike.It must be melt when light strike on ...
0
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3answers
128 views
Should I disconnect appliances if there is lightning? [closed]
Is it safe for electrical appliances to stay connected to the socket when there is lighting, or is it better to disconnect them?
1
vote
2answers
783 views
USB 3.0 wires for data transmission
USB 3.0 has 9 wires.
4 from USB 2.0 (VCC, GND, D+, D-)
+ 5 new for super (SSTX+/-, SSRX+/-, GND)
My Understandings: (these may not be correct)
- USB 3.0 is separated from USB 2.0 and USB 3.0 ...
