Manufacturers Instructions - New installations
Posted: Thu Aug 19, 2021 9:21 am
ESR 59 (3) allows us to use MIs to maintain or replace as an alternative to following 3000
ESR 59 (2) only allows compliance with part 1 or 2 of 3000
ESR 14A allows us to rely on them as being electrically safe in certain situations outlined in (a) and (b)
But can we use MIs as an alternative of compliance in new installations?
My question comes from the fact that many inverter manufacturers now specify RCD protection on the grid AC side of the inverter and although 4777.1:2016 allows this and tells us to follow MI recommendations (3.4.5), 4777.1:2005 the cited version doesn't allow RCD protection as per 5.3.4 and note 1 also confirms this on Figures 1, 2 and 3 (understand these aren't requirements but backs up the clause)
So clearly RCD protection is a good idea as both the manufacturers and the more up to date standards allow it
But can we use the MIs to get around the fact that if we ESR 59 (2) and follow part 2, ESR 60 (2) says we must comply with 4777.1:2005 or can MIs not get around this?
If we can't, is the only option a part 1 design in accordance with ESR 59 (2) if we wanted to go down this route?
ESR 59 (2) only allows compliance with part 1 or 2 of 3000
ESR 14A allows us to rely on them as being electrically safe in certain situations outlined in (a) and (b)
But can we use MIs as an alternative of compliance in new installations?
My question comes from the fact that many inverter manufacturers now specify RCD protection on the grid AC side of the inverter and although 4777.1:2016 allows this and tells us to follow MI recommendations (3.4.5), 4777.1:2005 the cited version doesn't allow RCD protection as per 5.3.4 and note 1 also confirms this on Figures 1, 2 and 3 (understand these aren't requirements but backs up the clause)
So clearly RCD protection is a good idea as both the manufacturers and the more up to date standards allow it
But can we use the MIs to get around the fact that if we ESR 59 (2) and follow part 2, ESR 60 (2) says we must comply with 4777.1:2005 or can MIs not get around this?
If we can't, is the only option a part 1 design in accordance with ESR 59 (2) if we wanted to go down this route?