Hi, what can I get to protect my CCTV cameras/nvr from getting fried if lightning struck?
Is something like this sufficient enough?

https://forum.lowyat.net/topic/272679

From another lowyat thread, they seem to recommend Cal Lab brand over belkin

https://forum.lowyat.net/index.php?showtopi...post&p=66449443

For the past few years when thunder strikes, only my router that's connected to modem that's either fried or LAN port damaged.
So I'm kinda worried it might damage my cameras when I'm using wired POE LAN system

For Chinese set hikvision, can you use IVMS 4200/4500 mobile app to access your cameras?
Can ezviz be used if you're using chinese camera outside of china region?
Is the motion/alarm alert message notification in chinese or english?

This post has been edited by alucard89: Dec 9 2016, 02:40 AM

From what I know of until now, you are able to use iVMS 4200 mobile app to perform remote viewing on Hikvision China set.
I can't remember the motion/alarm alert message language, but I believed it should be in Chinese.
Also, the time and date OSD on the camera screen, is in Chinese, you can set the day, month and year to be displayed in numerical rather than in Chinese, but can't get rid of the day of the week display in Chinese.

I have not much experience on lightning arrestor or lightning isolator, but you can ask around or wait for other people reply.
I remembered that the Hikvision network camera has 6kV lightning protection, I saw the words written in the packaging, but not in the specification on their website.
Better still to have another layer of protection just to be safe.

if your TV is of android based, then there's a chance... but first, you'll need to download the app and make sure that the app is available for your TV.
Kindly remember that say brand A camera, will have their own proprietary brand A app as well. You cannot buy brand A camera, then use brand B app.

Anyway, with that said, yes... you can buy wireless cam, connect to your router, then have the TV connected to the same network, then stream it through the app on TV.
However, even though it's wireless you'll still need to lay power cable for the wireless camera, and also one more thing, outdoor wireless cameras are quite expensive.

Regarding on lightning strike, it's a sensitive issue. There's no 100% way of covering the acts of god, it's just too random.

However, technically if you were to open up the plastic housings and compare the Belkin to Cal-Lab, Cal-Lab would be a much better isolator.

I've been selling Cal-Lab for a long time, and yes it works. Most of the time, the lightning isolator is fried, but the item remains unharm.

The question is, Cal-Lab has got many type of isolators, which isolator should you use?

Also, which point should you allocate your isolator? Here are a few suggestions.

1. 230VAC power plug top
2. LAN port on your modem (that connects to the recorder/camera. If you have 10 cameras, and you want to protect them all, you'll need 10 isolators already)
3. LAN port on each of your camera at the camera point. (protecting from the router end, doesn't mean it will stop the lightning at cam end. If the lightning strikes the cable, the excess will flow to whichever pressure is lower, or maybe both ways)
4. DC plug point of your camera

Do remember that a complete isolator solution can be quite costly.

6kv that don't seem to be a lighting protection circuit maybe good for incoming surge but not lighting. Lighting is many more time of that and depending on the strength and area too.

http://www.windpowerengineering.com/featur...t-of-lightning/

Been using Cal-Lab, is good so far. at my mom house, only cal-lab managed to protect my dsl modem, the other brand i try it fried together with the modem. Proble with Cal-lab need to pay small fees for a replacement.

Any lighting protection, it have to be protected at the point of entry of lighting (usually is electric source, antenna, and long running conductor like wires)

How to know if the DVR can receive via wirelessly?
I am looking at DS-7200HGHI-SH HIK Vision

Hmm, I'm not an expert for HIK, as I usually sell Dahua products.
Based on the specs, this model does not have the wireless antenna required for accepting WiFi signals.

Also, actually if you can connect this recorder to the router. Place it near your router.
Connect the recorder via a short network patch cable, you don't have to fork out so much on the WiFi model ma.

6kVA is usually for lightning surge. Meaning that, when there's a power trip, the fuse at our DB box tripped. However, that doesn't mean that TNB stops supplying power to the house. Theoretically, it's like clamping the water house with our hands. When the power resumes after we flip the fuse, imagine the water surging through because of the pressure held, electricity will also surge to your devices as well. If the lightning chip cannot handle the surge, then it will burn the device.

That's the reason why places with frequent power trips end up with more electronics damaged. Furthermore, our devices are ELV, only consumes 12VDC. Therefore, even slight surge means a lot to the device already.

6kV lightning protection did not mention the response time that it needs to stop the lightning. When there's a incoming surge of more than 6kVA charging at the device, you'll need an isolator to cut off the surge. Plus, the isolator better make sure that it response fast enough to cut off before the surge goes through.

This is where Cal-Lab's lightning isolator comes into place.

This DVR model is using TVI technology, meaning it runs on coaxial cable.
As far as I know of, there is no WiFi or wireless functionality for TVI camera and recorder.
To run surveillance system with coaxial cable, you will need minimum of 2 sets of wires, coaxial cable and power supply cable.
If you want minimum cable running on your surveillance system, you can consider network surveillance system with POE functionality.
With POE, only one cable is required, which is the network cable.
Even with surveillance system with wireless or WiFi system, you still need power point to supply power to your camera.
Hope it helps.

I'm buying this model DS-2CD2145F-IS
Getting the multilanguage one

https://www.aliexpress.com/store/product/Ne...2451307151.html (can't find any official hikvision website link yet)

Is lightning protection listed for this model?

My setup would be like this



Would placing one isolator between Router & POE adaptor/NVR be enough?
Or should I install it between telephone line & modem.

This post has been edited by alucard89: Dec 9 2016, 05:49 PM

That model listed in AliExpress is either one of these two:
http://www.hikvision.com/cn/prgs_964_i8166.html
http://www.hikvision.com/cn/prgs_964_i13191.html

Again I don't see any of the lightning protection mentioned in the website page.
It is always good to have a separate lightning isolator to protect both your recorder and camera, without relying solely on the possible built-in lightning protection module.

HIKVISION DVR don't support WIFI Dongle like DAHUA DVR.
If you want connect the HIKVISION DVR Wirelessly with your router, go get an Access Point, example: Dlink DAP-1360

That is because anything that would stop or block lightning is a scam. A 6kV number does not exist IF the device is not properly earthed. Again, only scams isolate from or stop lightning. That camera suffers no damage is the 6kV transient connects to earth on a path that does not pass inside through electronics.

No lightning protector (or lightning rod) protects or isolates from surges including lightning. Protectors (and lightning rods) are only effective as connecting devices. Actual protection is done by what harmlessly absorbs hundreds of thousands of joules - earth ground. Protectors (and rods) protect only by connecting that energy harmlessly to earth.

All protectors (and lightning rods) are fast enough. What defines that protection? Quality of and connection to (it must be a low impedance connection) to earth. How to increase protection? Make a lower impedance connection (ie wire must be shorter; not thicker). Expand / upgrade the single point earth ground. Only then is a protector more effective.

You really type too much to explain a simple phenomenon..

A simply "path of least resistance" is an apt explanation ..

Also please stop with lower "impedance" when you can narrow the term to be resistance..

What is the frequency are you referring to with your "impedance"..

If you need to be technical then please at least explain why you keep using the term..

Edit* Just becareful when you view profiles.. Nobody here is totally invisible..

This post has been edited by Richard: Dec 10 2016, 02:04 AM

Resistance is irrelevant. Impedance is the significant parameter.

For example, a 12 meter copper wire might be 0.2 ohms resistance. That same wire is something like 120 ohms impedance.

Other factors also apply. If a wire has numerous sharp bends, resistance does not change. But impedance increases significantly.

From an engineer at WXIA-TV:

From the book "Safe Coordination Between Power and Communication Surge Protection":


From Smiths Power application note entitled "AC and DC Power Protection at Communication Sites":


From QST Magazine (by the ARRL) entitled ""Lightning Protection for the Amateur Radio Station"


From Mike Holt's "Grounding vs. Bonding":


From Electrical Engineering Times entitled "Protecting Electrical Devices from Lightning Transients":


Wire thickness affects resistance. Impedance is defined by wire length and other parameters. No soundbyte (apt) explanation of science exists. Sound bytes (simplistic answers) are a first indication of junk science reasoning. Professionals cite impedance - not resistance. A protector is only as effective as its earth ground. That means single point earth ground AND a low *impedance* connection.

That 6kV protection is effective only when a low impedance connection to ground exists. Then a surge that might create 6000 volts instead creates near zero volts. How close to zero? How low is that impedance?

From my understanding

Ohms..
Impedance = Reactance(inductive + capacitive) + resistance

Where reactance = 2πfL + 1/(2πfC) ; (inductive + capacitive) (f=frequency)

What is the frequency of lightning? Is is DC or AC ?

When lightning strikes it creates a plasma as a conduit to get to ground.. This is purely resistive (as i know air has no frequency)..

What you are reading are reference to lighting with frequency which has no basis..

Our local LPI (lightning protection system) JKR specs have always used the Franklin rod system for protection against lightning strikes "rolling sphere" principle..

Thus your reference to impedance makes no practical use..

The only standards that are employed here (Malaysia) are JKR (bahagian elektrik) which have numerous engineers who have case studied (i mean this literally) schools, government buildings damaged by lightning..

I have not heard of impedance being used in any of the seminars I have attended..

You are welcome to prove me wrong..

Edit * Your example,

a 12 meter copper wire might be 0.2 ohms resistance. That same wire is something like 120 ohms impedance.

It makes no sense if you don't mention the how or the why..

for impedance there must be frequency .. Where is this frequency? and is it inductive or capacitive? what?

Never mind.. I've just concurred with your use of impedance..

This post has been edited by Richard: Dec 10 2016, 12:08 PM