Installing 3 phase surge protection
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- Опубликовано: 17 июн 2023
- In this video im back on the KQ loadcenter Install and its time to fit the 3 phase surge protection.
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The works carried out in the video and the opinions shared are my own, and not representative of the associates and companies in the video.
This content is purely for entertainment purposes and is in no way a "how to", tutorial or educational video.
Please consult an electrician when dealing with any electrical installations.
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I'd terminate the SPD first and work the slack back to the breaker. I find it slightly easier 👌👍
Great video as always Mike. As an apprentice I definitely enjoy your videos the most, how much effort and pride/prep you put in your work is so nice too see. Also thank you for making these the amount I've learned of you is incredible so thank you.
Nice work, as usual. Always enjoy your videos. Thanks!
I think the only thing I've disliked about that board compared to the isobar is the lack of extra din rail space next to the main switch for the spd to help keep that max distance down.
Now you mention it, the vehicle entrance from that other video looks a lot like the contractor's entrance for QVC at that business park. If you are there, it's a site I did a bunch of work at, back a few years ago.
Great job bra
Great video, Congrats on your wedding
Did he marry a Fuseboard 😂😂😂
I just want to know does this spd protect the whole board
Youd didnt much say about the cable sizing in to the spd from the mcb. Or breaker size and why..
Do you have the switches to the middle of the board or to the outside of the board for on?
Shouldn't the SPD be connected with a maximum of 50cm earth wiring?
Is this a kit? I've only ever found the schneider SPDs on their own. The enclosure looks like its the MCG SPD kit?
One way to help keep SPD lengths within the maximum permitted 1 metre is with shorting length C (Earth) this can be done by connecting it to a local earth bar within the serperate SPD enclosure. Any length after this local earth bar is not counted towards length C.
Why I have no idea 🤔
However, it is a life saver when fitting 3-phase SPD's in a separate enclosure from the DB.
Except... that will pass regulation but will not mean that your SPD now works correctly with some sort of black magic! In fact even 1 meter is not really ok. You installed an SPD that is probably not so effective, or it doesn't work at all, so you basically wasted money and worse gave a false sense of protection.
@@alerighi Completely agree mate... In fact we should be all ensuring SPD lengths are 0.5 metres or less. However, when out of our control (For example in this video) then at least our work complies with current Regs and is not coded in a future EICR. This is more of a designer fault, but if the designer approves then we've done our best to comply with Regs.
@@alerighiWhy would it not work at all?
@@E6EES The AC resistance is too high which causes a significant voltage drop on the wires between the SPD and panel.
Can I have stupid question? Why you haven't bond the surge protection box with rest of enclosures?
The SPD box is earthed through the conduit/trunking system
Does the spd cover the whole install how does that work pal if its just fed off its own breaker
The SPD is wired in parallel with the supply. If the supply voltage exceeds a critical threshold, then the SPD acts like a short circuit and clamps the supply, preventing the voltage from rising higher and damaging other equipment connected to the same supply.
This transient over-voltage is short enough such that the SPD is able to function and suppress the over voltage condition before the breaker is able to open the circuit between the supply and the SPD.
The impedance of the supply, the impedance of the wiring, the behaviour of the circuit protection devices protecting the SPD, and the specifications SPD itself all need to be appropriate for the protection of the SPD to function. In practice each regulatory body will have created a set of specifications that make sense together and electricians just need to be aware of this guidance.
In this particular case, the wires between the supply and the SPD look a little long to my eye.
Does the SPD not have to have very, very short leads… (within 0,5 meter)..?
Yes
During connection there is 110 v appearing in earth line
That trunking is almost cheating 😂 We dont really use it in aus - not even sure if it's readily available. Might look into it its such a good finish 🤘
One note. The distance from the circuit breaker to the surge protector is too long, there are limitations in the installation instructions.
@@residualcurrent we will quite often do as you have described when retro fitting. Fitting inside the DB with an external failure alarm
Whats a sbd ? 11:53
SPD - Surge Protection Device
@@Jay369 cheers fella
I can’t stand the Schneider ct meter set up. Gets ridiculous when you have a 50mm 5core
I think it’s more than 50 centimetres 🙄🫵