Adding an automatic add bond to the Sunsynk inverter
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- čas přidán 8. 09. 2024
- If you need to add a neutral to earth and they should only be done while Inverter is in Island mode as it may cause problems upstream.
By connecting a 240 V Relay between the neutral and earth, (normally open contacts) and the coil to the A/T/S signal as shown in the video then this can complete the bond when the inverter is running off grid
Anyone watching this, note this is for the non eco version of the sunsynk, the eco version is different, search on CZcams for sunsynk channel and a video around 15min long where the correct set up for eco version is.
Keith, would you add an additional earth/ neutral bond on the smart load in addition to the load?
Good question. I would also like to know
How would one go about sizing the correct current rating of the relay that is to be used?
Hi JJ. I would have thought the relay / AC contactor would be single - phase, 2-pole , din rail mounted and the current will be dictated by the rating of the load you wish to supply ? EG. 3.68kw inverter output would perhaps require a 16amp overcurrent protection device and perhaps an RCD / RCBO in line.
The switching contacts of the relay / contactor normally consume milliamps .
This is all basic electrical stuff, so unless its understood properly it is advisable to seek expert advice.
Maybe that is why many questions remain unanswered ?
@@MultiOutdoorman The entire purpose of the bond is for the earth leakage to trip when live or neutral touches metal or a human. Most earth leakages trip with a 75mA difference, that is the safety requirement - hence the contactor should never really see a full load current flowing into earth.
@@MultiOutdoorman do you know wire gauge earth and neutral side
Excuse me for my ignorance, but what is an add bond and why would it be required?
Hi David.
As you might be interested ?
Bonding, grounding and earthing terms are all thrown around meaning similar things but all having different criteria.
Bonding means to physically join together (with approved methods), extraneously conductive
( metallic) components ( stuctures, enclosures, pipes, wiring CPC's) together, so that they have Equal (ideally zero) potential in the event of fault conditions.
By establishing continuity and bonding together neutral and "earthed" items at the SOURCE ONLY of the power supply, the earth (CPC) acts as a neutral return path should anything bonded become live (loose wire touches metal etc) thus providing a short-circuit facility.
An RCD / RCBO device would then detect an imbalance between the line and neutral connections within the device as current would have "leaked" via the "earth" conductor.
Always seek your own professional assistance when dealing with electricity !
@@MultiOutdoorman Great answer, very comprehensive yet clear and precise.
Thank you.
when i am on island mode.. can i charge the battery from the grid?
Island mode means isolated from the grid, so i wouldnt think so Mahdi ... unless my understanding is flawed .
In order to charge a battery from the grid, several things are needed:
- Connection to the grid
- An inverter that transforms grid AC into DC that the battery can use to charge
- A charge controller / BMS, which ensures that the battery receives the correct voltage and current (among other things)
if its no bond island mode what will happen sir
You will have both phase and neutral wire with potential. And some equipment could not work properly.
Neither of my eco 3.6 inverters will do that. The multifunction port only has numbers 1 to 8 ( left to right)
I have tried paperclip and test meter across all options between terminals 5 and 8.
No continuity with AC disconnected (2 pole). Signal Island mode is ticked and ok'd. Please help.
Tech says SA hasn't had access to one yet so still unclear.
Manual included shows older models interface.
Thanks...