Creating an Earth Neutral bond on a
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- Опубліковано 23 сер 2024
- When using the #Sunsynk Inverter as a UPS in Islanding Mode it is important to ensure the UPS output is maintained as a class one connection rather than a class two.
If the output is a class two then all you can connect to it is a single socket, if you want the output to be connected to the household essential loads then you would need to change the classification of the output from the class 2 to a class 1
Items like toasters refrigerators light fittings are mainly class one products if you don't create this bond then you carry a small risk of electrocution.
This is a very important topic that almost never gets taught or understood in the solar industry. This should be the first thing that gets taught in solar !
Please add a N-E bond relay into all inverters and allow us to enable/disable it for islanding mode in the settings.
I second that.
It's the same with Deye inverters (same machine).
Or, at least, they should explain this clearly in the manual.
Please include a wiring diagram next time. Enjoyed the vid
Makes total sense if you want to feed grid power though your inverter has to move the bond to the grid connected panel where the bond is made. If you're running off grid now the bond is made in the inverter.
The neutral conductor must be connected to the PE in EPS mode without having to install a contactor yourself. The living rooms may only be supplied with the grounded neutral conductor. So Sunsynk made a big mistake and didn't install a grounding relay in the inverter itself.
This is quite an expensive inverter with an earthing problem. I would expect these inverters to be fitted with an earth-neutral bonding contactor at the assinembly plant. Now the installer must run around trying to fix it for Sunsynk.
LOOKS LIKE THE DESIGNER FORGOT ABOUT IT - LOL
Absolutely
Would this also need a earth spike? To give the property a better earth as if we loose a grid supply we will have to assume this could be a earth fault as well?
If I were not connected to the grid in any way because I am on a remote farm... I would want to connect my generator to the AI input. My question now is - Should I bond my inverter and keep my generator as a floating neutral supply or should I bond my generator only and keep the inverter as open neutral supply? The Generator will be connected straight into the sunsynk inverter through a MCB.
Please help me, I am really struggling to find that information.
I wanted to have my whole house battery backed by the inverter (except the shower and cooker as they use vast amounts of power), but my installer wouldn't do it because of this earth-neutral bonding problem. Was my installer wrong? Was my anticipated install possible after all?
I have a question, Unless I mount it on a Van or any type of vehicle where there is no option to connect the inverter to the earth then why should I even think of bonding? Can I not just simply pull a wire from earth grounding and link it to the inverter and busbar ? Tell me if I am wrong cause I am not an expert like you who is touching contractor with bare hands.
Hello, where is this connections on the 8 kw Sunsynk
What are the implications if the installer made this connection as a permanent bond and does not use a relay ??
I guess you would be not able to connect GND to earth bar
I'm suffering that problem
RCD tripping upstream
What is the procedure for the Sunsynk 16kW Max. There is reference in the Manual about the neutral earth bond in island mode with the coil of a relay/contactor connected to a/t/s pinouts. However, on the inverter and in the manual, no such ports are indicated. Is there a different procedure with this machine?
Pin 7 and 8 is a dry contact, take L N from load tapped though a NC relay input side. Then on then NC side of the relay, run E N though.
You take a feed from the L of the Load port on the inverter through a mini circuit breaker (MCB) or inline fuse sized according to the wire size (note, 1mm or 1.5mm wire ideal, given that the connector strip can’t handle thick wire, e.g., use 1.5mm with a 6A MCB) into pin 7 on the inverter, take a feed from pin 8 on the inverter into A1 of a normally closed (NC) contractor. Take a feed from A2 of the NC contractor to the N on the Load port of the inverter, completing the circuit. Connect the N from the Load port of the inverter to the NC contractor pin 1, connect the other side of the NC contractor to the earth busbar. You can also get a contactor with more than one NC port and use it with an indicator (led) to show when the inverter is in island mode/when the earth-neutral bond is active. Do all of this in an external AC distribution board, e.g., use DIN rail contactor, DIN rail MCB, DB neutral bar and DB earth bar, and DB live busbar across MCBs on Load port L feed from inverter. Use DIN indicator, e.g., green for earth. Use 1A MCB indicator. Always fuse/MCB protect every link.
Very nice system
Why is it that the RCD keeps on tripping as soon as the bonding contractor operates after a power failure? If i disconnect the contactor and connect it after say 2 seconds the RCD doesn't trip. Can't a delay of 2 seconds be implemented to operate the contractor? Or is my RCD perhaps at fault?
Hi! Hanks to share this video. I couldn't find the ATS output (which is connected to the contactor coil) max power/amper. Please, share it with me.
Which N line needs to be connected to contactor, ups load N line or home loads/grid N line?
The section about the software version, is the version you listed the absolute minimum, or will slightly earlier versions still work? I currently have: COMM419 - MCU:3162 on a Sunsynk 5kW unit.
Keith, i bought 2 of the new ECO 3.6 inverters from Tom and Joel.
The printed installation manual , although updated for this new model ... has inadequate information on the 8-way multi contact terminal ( numbered 1 to 8 but nothing else ! )
Dave is looking into it i believe but i am still in the dark as to which terminal operates what ????
Should be a QR code on the side of the inverter that links to the correct manual
How to choose the contactor?
How many amperes must the contacts carry for a 8kW inverter: is just a reference to the earth or they should be rated at 40 A?
63A
This earth bond always trips the elcb feeding it. I just bridge earth and neutral on output before RCD on output.
BRIDGE SUPPLY VOLTAGE EARTH AND OUTPUT NEUTRAL
ua-cam.com/video/mQR5VKdlshE/v-deo.html this is a follow video
This needs a fail safe ? How to implement?
Do you have grid tie inverters?
does it provide VDE-0126?
Is there notes on this?
The video doesn't show what happens when the power is restored...
Thank you for a very informative video.
How would you suggest this be achieved in a Parallel setup, having multiple inverters, master, slave, etc... ?
Do they need to "share" a contactor or should each Inverter be on it's own separate contactor? ( I would assume each Inverter should have it's own contactor, including "Island Mode" configured on it - and not just the master Inverter ).
The reason I am asking is that none of the manuals or videos I've been watching is clear on this subject ( relating to a Parallel setup ), and I found that if Inverters are running in Parallel then the slave is not 100% synchronized with the master and that a slight delay ( milliseconds ), causes the RCD to trip upstream ~ note that both Inverters outputs are "Paralleled" together towards the main distribution board ( upstream ).
Should you ( if each Inverter has it's own contactor ), enable "Island Mode" on both Inverters ( or only on the master )?
Thank you!
I am not commenting as an expert but id assume inverters connected in parallel share a common earth meaning only one bond would be necessary, having more than 1 could be dangerous as the earth wire could become hot if a short occurs between the 2 bridges essentially turning electrical devices with steel enclosures connected to the inverter into electrical execution devices. I would assume the master inverter will be tasked with the neutral to earth bond. If im not mistaken in South Africa legislation demands the inverter neutral to earth bonding must be permanent
If the inverter neutral-earth bond is permanent don't you get ground loops?
Otherwise I cant see the point of switching it with a relay.
And this video really ought to show use of a ground spike for Islanding Earth.
NO or NC contact?
Can’t we just use and earth rod Keith?
I would like to know this. Never seem to get a answer though. This is in the uk
@@carlshaw7843 AS FAR AS I KNOW YOU USE EARTH ROD/SPIKE TO IMPROVE AN EXSISTING HOME POOR EARTH RESISTANCE. IF THE HOME EARTH IS EXCELLENT - YOU DONT NEED THE SPIKE. HOWEVER AN OFF GRID SYSTEM MUST ALWAYS BE SPIKED.
This doesn’t operate at sufficient time for bs7671 coming back from island mode.
Detail Lee ?
This is the same guy who thinks South Africa lives in the dark . we have all the modern inverters.
Gets 😂increasingly Interestinh if using a genny. Battery regs confusing as say to keep the pme connected in island mode😮... earthing is a complex subject
Why not just ADD an earth rod?
Ever country is wired differently.
Since you have the knowledge and the camera man, and the time and money to do all this.
Why not actually show what you are doing instead of your face.
Sunsynk is just fill of issues in our country. The blind leading the blind