Help me out dimers

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Deal Cadet
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A 32kv 3 line electric wire is near my home. Today two blast happened in it because of bird or some others issue and now my laptop charger is not working. Two other mobile charger also stopped working in the past because of these blast. How can I protect my devices against these huge electric surge? If any dimer can suggest something concrete about my situation then please help out?. Some Bulbs also got fused but Bulbs are under warranty so I can change it anytime because it's from local vendors but these charges are taking a huge sum of money.
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Benevolent Benevolent
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Install inverter and use battery power for sensitive and costly items like chargers, lights etc - adhoc solution

Earthing also check once

Voltage Stabilizer is permanent solution

Tech Guru Tech Guru
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It's not due to voltage in the lines. There is no direct link with a 32KV line with our household connection. There are intermediary stations before power reaches our homes. If there was really a voltage surge in the line then tv, fridge etc would have been fried. No?

Why exactly the issue is affecting unshielded devices having a transformer in them? 

Stray electric fields are powerful enough to induce a damaging voltage inside those devices. That's why inverters and stabilizers are placed in metal boxes, aka Faraday cages. 

The devices cased in normal plastic are not shielded from stray electromagnetic interference. Remember, how spark plug IC engines used to interfere with operation of CRT TVs? 

@Spock @andromeda @Rajkotian

@LIMBO  @suman1993  @MrKool_JJ

Tech Guru Tech Guru
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It's not due to voltage in the lines. There is no direct link with a 32KV line with our household connection. There are intermediary stations before power reaches our homes. If there was really a voltage surge in the line then tv, fridge etc would have been fried. No?

Why exactly the issue is affecting unshielded devices having a transformer in them? 

Stray electric fields are powerful enough to induce a damaging voltage inside those devices. That's why inverters and stabilizers are placed in metal boxes, aka Faraday cages. 

The devices cased in normal plastic are not shielded from stray electromagnetic interference. Remember, how spark plug IC engines used to interfere with operation of CRT TVs? 

@Spock @andromeda @Rajkotian

@LIMBO  @suman1993  @MrKool_JJ

Tech Guru Tech Guru
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@bikidas2060
It's not due to voltage in the lines. There is no direct link with a 32KV line with our household connection. There are intermediary stations before power reaches our homes. If there was really a voltage surge in the line then tv, fridge etc would have been fried. No?
True, whats with the other appliances? Is ground connection proper on these sockets which you use for laptop power? Even if grounding is proper, does your power bricks (chargers) use the 3rd pin meant for grounding? Many folks bypass the ground line either with a jugaad or using other converters. Most mobile chargers do not use this ground pin, and few laptop chargers in this category.

On a similar note, you need more grounding than usual due to relatively high EMF due to high voltage lines.
Why exactly the issue is affecting unshielded devices having a transformer in them?
If you are thinking of a step-down transformer, we moved away from using it long time ago. SMPS technologies uses flyback transformer (not really a transformer but couple of inductors together). The whole desings are generally made immune to EMI/EMC and they do need to pass certain tests to see the market. But with a lot of counterfeits or cheap desings, we will see a lot of them in market. 

Again, there are a lot of flyback transformers in almost everything that we plugin at home (Refrigerator, TV, router, charger etc)
Stray electric fields are powerful enough to induce a damaging voltage inside those devices. That's why inverters and stabilizers are placed in metal boxes, aka Faraday cages.
One of my neighbour's stabilizer went kaput due to voltage surge sometime in 2021, it was bought atleast 10-12 years before. It is from Voltas and is fully plastic enclosed held with 4 or 5 metal screws. And most stabilizers/inverters these days are full/half plastic enclosed due to cost effective/aesthetics etc. I do remember the stabilizer/inverter designs from past which are completely mettalic enclosed, but again with decent amount of slits for ventilation. The slits completely defy the word faraday cage.
The devices cased in normal plastic are not shielded from stray electromagnetic interference. Remember, how spark plug IC engines used to interfere with operation of CRT TVs?
The electronics are usually immute to decent amount of EMI/EMF. And a faraday cage with out proper grounding may not be effective IMO.

To the OP,  suggest to get this inspected by a qualified electrician, and do talk to neighbours (including next door, and near by buildings) if they are seeing similar issues. There could be interference from the high power lines, but it can be mitigated by proper shielding, grounding. Another pointer is to identify if this issue occurs on a particular socket.

And as @suman1993 mentioned, I'm curious if you noticed any health issues? I don't have first hand experience, but heard from a friend (brother's network) that he had to relocate as his kids are having some or other issue


22 Comments  |  
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Deal Cadet Deal Cadet
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dd-1702638061137From my balcony, it's not even 10 feet.
Deal Cadet Deal Cadet
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These things happen in ac socket not in dc socket that's what I observed so currently converted that into dc.

Benevolent Benevolent
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Install inverter and use battery power for sensitive and costly items like chargers, lights etc - adhoc solution

Earthing also check once

Voltage Stabilizer is permanent solution

Tech Guru Tech Guru
Link Copied

It's not due to voltage in the lines. There is no direct link with a 32KV line with our household connection. There are intermediary stations before power reaches our homes. If there was really a voltage surge in the line then tv, fridge etc would have been fried. No?

Why exactly the issue is affecting unshielded devices having a transformer in them? 

Stray electric fields are powerful enough to induce a damaging voltage inside those devices. That's why inverters and stabilizers are placed in metal boxes, aka Faraday cages. 

The devices cased in normal plastic are not shielded from stray electromagnetic interference. Remember, how spark plug IC engines used to interfere with operation of CRT TVs? 

@Spock @andromeda @Rajkotian

@LIMBO  @suman1993  @MrKool_JJ

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Deal Cadet Deal Cadet
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Hope you are aware of EMF radiations emitted from high voltage power lines. 

Are you able to get good sleep living near a 32K power line? ( maybe not after reading this. ) 

Helpful Helpful
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There is a high tension line near my home, how to easily check if there is EMF radiation affecting us?

I think it's 11KV line as there is a station named 11KVa 10KM nearby.

I don't understand why does the put these lines in residential area or approve residential status to areas where there is a high tension line😢

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Tech Guru Tech Guru
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Faraday cage will be impractical but you can try it. Basically you need to wrap the charger with a metal sheet. It should protect the device from stray electromagnetic interferences. 

Deal Subedar Deal Subedar
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Put an SPD breaker on main switch board..it will trip the lines whenever a surge occurs. Check videos from youtube. Get idea of SPD pricing from Amazon.

Btw, don't go by your local electrician as he may not know the purpose and diff between MCB SPD RCCB etc because probably he hasn't used one yet. This is not a rocket science, show him videos from YT and he will understand how to connect. 

Generous Generous
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Get a Servo Main Line Voltage Stabilizer installed at your home.

Deal Cadet Deal Cadet
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This seems to be the proper solution. SPD's are hit-and miss.
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Pro Entertainer Pro Entertainer
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Dont play or experiment basis on some random comments on any platform. I request you to consult any local ELECTRICIAN give him 100 rupee for solution and more for implementation.

@goss8877 bhaiyya ye admi Bijli ko chumna chahta he. Jara batao inko

Deal Cadet Deal Cadet
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Talked to my own electrician who wired my whole house.He said, it should not happen because there is a mcb for every electric board and in main board. MCB always gets trip down but before that charger stopped working. New one will cost me 4k bro.

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Deal Cadet Deal Cadet
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Simplest way I can think of is to remove your chargers from the sockets/power strips immediately after you are done charging your devices and not leave them plugged in all the time.

Deal Cadet Deal Cadet
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Always do that because I know my situation, it's just I was charging and it just happened at that time.

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