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--- drafts:multigrid_faq [2019-01-22 10:42] – external edit 127.0.0.1
+++ drafts:multigrid_faq [2019-02-01 11:23] – guy_stewart
@@ Line 17: / Line 17: @@
 ===== # Error 11. =====
+For issues relating to # Error 11 alarms, [[https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes#error_11_-_installation_error_or_relay_failure_multigrid_only
-Error 11 refers to a fault state where an internal relay check is performed to assess if there is a functioning neutral earth link in the electrical system. If a neutral earth link is not found, the Multigrid will engage the relay and create this link.
+|please read the VE.Bus Error Codes page]].
-There can only be 1 earth, neutral link bond (NEM) in each installation. For example, In Australia, this link is made inside the supply mains distribution box.
-In the event of a detected grid outage, the Multigrid will disconnected ("island") the active AND the neutral on the AC-Input to the inverter. This also serves to remove the NEM connection, which needs to then be quickly re-created inside the Multigrid for the AC-Out. This is to maintain safety features on the electrical circuit such as residual current devices (RCDs).
-It is important for the operation of this relay, that the neutral links on the AC input and AC output of the Multigrid remain isolated from each other.
-If there is a connection detected between these two neutrals, it will trigger Error 11, and the unit will shut down until it is corrected.
-If you are adding the Multigrid to existing wiring and intend to seperate the essential (AC-Out) and non-essential (AC-In) loads; It is recommended to disconnect all existing distribution board wiring for these and re-wire the board with them structurally separated and clearly labelled.
-To be clear, that is two separated, neutral buses. One for the mains grid supply and one for the AC-Out 'Essential Loads' that will remain on during a grid outage.
-It will only take one instance of a circuit with the active connected to the AC-out, while the neutral is connected to the AC-in neutral bus (or vice versa) to lead to re-occurring error 11 issues.
-Furthermore, future circuit additions by electricians who are unfamiliar with the separated neutral links could lead to issues arising with an otherwise functioning installed system.
-If you are not separating the loads into Essential and Non-essential, and all loads will be connected to the AC-Out of the Multigrid, then you will STILL have 2 seperate neutrals. However the ONLY load on the Main Grid Supply neutral will be the Multigrid AC-Input.
-This will still cause the NEM link to be broken during an outage, and the new NEM link to be made inside the Multigrid.
-You will need to run two Active and two Neutrals to the Multigrid, one for the AC-In and one for the AC-out. They will share the same common earth.
-{{:drafts:multigridwiring.jpg?600|}}
 ===== # Nuisance Tripping of Residual Current Devices (RCDs) =====
@@ Line 64: / Line 38: @@
 If multiple circuits sharing a single RCD each have a small leakage, replace it with RCBO’s on each of the circuits to bring down the total to within the limits.