Generator connection

[ians]

Derlyn ... please plug in your ELCB socket and polarity tester (the one with 3 led lights) let us know what see.

[ians]

An important note.

https://www.youtube.com/watch?v=gr6Z_bBiy5g&ab_channel=LEARNELECTRICS

[Derlyn]

@Ian
Gonna do some more testing tomorrow.
That was on my list of things to do.
Far from finished playing around with gennys. Too much that I still do not understand.

Vov is easy.

Disconnect the centre tap and connect the neutral to earth. Sorted.

These new gennys are not vov wound. They only have 2 thick wires from stator, namely live and neutral. There are about 6 or 7 thinner wires also coming out from stator. At this stage I don't know exactly where they connected or if they are connected to the stator, but I'm gonna carry on until I find out. Must have something to do with regulating the speed and voltage output.

Will keep you posted.
Derek

[Sparks]

I just saw the email with the original post. Check to see if the generator N and E are bridged.

[Derlyn]

Ok, some feedback.

Generator no load, only 2 lights on plug tester.

Opened generator and found the earth is floating. Hit in earth spike and earthed genny .... problem solved. 3 lights and earth leakage trips.

Disconnected earth spike, back to 2 lights on plug tester.

Opened genny and bridged neutral and earth. Connected to installation and tested. 3 lights, earth leakage tripped with tester as normal.

It seems safe to say that if the genny is NOT VOV then bridging the neutral and earth on genny is the answer, but first make sure that its not vov wound.

Interesting little exersize.

Will post some photos this evening.

Peace out .. Derek

[Justloadit]

If I am not mistaken, this falls under alternative load Earth/Neutral bonding wiring.

[Derlyn]

One or 2 photos. ( man of my word )



Floating earth




With earthspike. 3 lights.





My earth/neutral bridge ( yellow lugs )





Testing in kitchen with genny.


We modified 2 genny's today. The one was the Ryobi 6900 and the other was a Fragram 5 GFD-3 5kva.

Tips. The wiring coming from the stator are not wired the same in these 2 models, so you need to make sure which one is being used for the neutral by removing the control panel in front.

I will carry on checking different gennys, but it seems to me that anything 5kva or bigger is not vov, but one still needs to confirm.

Peace out .. Derek

[Dylboy]

That is great ! Thank you for the pics. Nice to learn a bit more on the genny side.

Having a thought (can be dangerous when i have a thought haha)

Instead of opening up the stator and doing what you have done , could it be possible to take the output of the genny and then bond the Neutral and the Earth to the earth spike ?

Now there are the gennys that have the centre tap and some not so not sure if it will work for both.

In my opinion it will work bar maybe the centre tap earth, but I would have to experiment unless a wise person on here knows.

Why I am having this thought is just for warranty stuff as opening the stator may void warranties and all.

Sent from my SM-N960F using Tapatalk

[Derlyn]

That is great ! Thank you for the pics. Nice to learn a bit more on the genny side.

Having a thought (can be dangerous when i have a thought haha)

Instead of opening up the stator and doing what you have done , could it be possible to take the output of the genny and then bond the Neutral and the Earth to the earth spike ?

Now there are the gennys that have the centre tap and some not so not sure if it will work for both.

In my opinion it will work bar maybe the centre tap earth, but I would have to experiment unless a wise person on here knows.

Why I am having this thought is just for warranty stuff as opening the stator may void warranties and all.

Sent from my SM-N960F using Tapatalk

Hello Brother

Bridging the neutral and earth will work on a vov wound, BUT the centre tap must first be disconnected otherwise you are basically shorting out one half of the stator coil and the genny wont last long at all.

Peace out ... Derek

[Dylboy]

Hello Brother

Bridging the neutral and earth will work on a vov wound, BUT the centre tap must first be disconnected otherwise you are basically shorting out one half on the stator coil and the genny wont last long at all.

Peace out ... Derek

Ah yes of course, Thank you !
So in the end it would have to be opened anyway to verify. Either way really enjoyed this post.



Sent from my SM-N960F using Tapatalk

[Derlyn]

Dont need to open to confirm. Just run the genny and check voltages with meter. Vov will give 115 between neutral and earth and 115 between live and earth, a 50/50 split, then you know its vov.

Peace out .. Derek.

[Dylboy]

Ah yes true to that too, that is the first test I would do anyway prior to opening. Either way the customer will be informed of what would need to happen and get permission if opening up is required.

Sent from my SM-N960F using Tapatalk

[ians]

The solution is simple ... signage and awareness ... you cant do any more that that.

I install the generator plug point at the meter use the correct equipment (correct size wiring ... circuit breakers ... changeover switch ... IP 65/7 enclosures and lable label and label) then attach a note to the email with the relevant information with regards to V-O-V ... max generator size for the applications and wait for my payment notice.