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Questions tagged [lightning]

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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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 ...
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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 ...
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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?
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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 ...
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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? ...
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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?...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 (...
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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.
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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.
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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....
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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 ...
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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 ...
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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 ...
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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.
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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 ...
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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?
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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 ...