Voltage Levels And Vo

[matt hunt]

Hi Guys, sorry for delay, I have had a full day converting the non believers in the North East 

Always provide RCBOs as it tends to cater for all needs, trust me I would prefer to provide an MCB at £6 rather than an RCBO at £22. My personal opinion guys before you all bombard me with BS7671 is to protect anything potentially outside the equipotential zone with 30ma protection, I know the 50mm rule but !!

 

[steptoe]

so, are your RCBOs DP, ?

otherwise there is no point,

and also do they comply with the various manufacturers specific instructions, or do you provide to suit?

 

[binky]

Hi Guys, sorry for delay, I have had a full day converting the non believers in the North East 

Always provide RCBOs as it tends to cater for all needs, trust me I would prefer to provide an MCB at £6 rather than an RCBO at £22. My personal opinion guys before you all bombard me with BS7671 is to protect anything potentially outside the equipotential zone with 30ma protection, I know the 50mm rule but !!

being seen off Matt, Denmans finest Control Gear rcbos are more like £12, and our forum sponsor does nice DP items for less than that - I think, haven't asked him for a while.

 

[binky]

diversyfying slightly from this thread - was watching business news about India, and 'guess who' were assembling MK MCBs

 

[Blue Duck]

Children?

Enjoying this thread just wanted to throw a spanner in...

What about SPD's?

 

[NozSpark]

diversyfying slightly from this thread - was watching business news about India, and 'guess who' were assembling MK MCBs

I also saw this..... Not quite so British any more :|

 

[matt hunt]

Hi guys, we are using the single module single height unit( same size as MCB) by M2 , due to the smaller footprint they do work out more expensive unfortunately!

 

[steptoe]

Are they DP,? 

SBS Dave sells single module standard MCB sized DP rcbos for just over a tenner. 

 

[Sidewinder]

Hi guys, we are using the single module single height unit( same size as MCB) by M2 , due to the smaller footprint they do work out more expensive unfortunately!

Is this the Proteus Switchgear M2 single pole solid Neutral device, typical code M216MBRSP?

If so how do you get around the requirement on certain installations where by you need to disconnect all live conductors in the event of a fault?

Mind, what product standards are you designing and building to for compliance with the LVD?

What do the product standards require in the way of single or double pole disconnection in the event of a fault.

Also, you should think about the fact that you have said that it is a single box fit and forget type unit for the electrical contractor who is doing the install, thus, it must also meet the requirements under BS7671.

 

[binky]

M2 CEFs home brand if I remember rightly.

Would be worth fitting DP rcbo just to cover all eventualities for domestic - at least nothing springs to mind that wouldn't be covered by that.

 

[matt hunt]

Hi CANOE, can I copy and paste at any time on this forum?? can you send me the link to SBS Daves product in question?

 

[matt hunt]

Is he my beer drinking qualified expert from a previous post?

 

[steptoe]

msl1: ROTFLW :slap

No the beer drinker i think your referring to is Steptoe :slap

:red card

and Im not going anywhere until tomorrow



Guinness   Guinness

 

[matt hunt]

Anyway, quite happy to look at incorporating anything into the products if the experts in the PV industry think we need to put them in, (yes that's some of you lot!), I did say some

Just to start you off again, I have been doing my homework today and have spoken to a very,very large inverter manufacturers technical helpline who has said that 1 in 3 inverter calls are now for high voltage cut outs, all of their inverters are set at 262v but they have been adjusting to 264v on request, in some cases the grid voltages have been upwards of 265-270v. Do you think this is solely down to the DNOs or maybe just maybe micro generation may be playing its part??

ah sorry me old mate Steptoe :coat

 

[matt hunt]

ok, due to the amount of views now should I start a new post as it takes ages to get here!!

Lets put it another way then!! if you had x street that has 3 inverters connected onto the same phase installed by non muppets, would the voltage be higher now than what it was before within the local vicinity, take into account this is in the daytime when the load is at its minimum from the grid. 

 

[steptoe]

I do a lot [LOT] of social housing work, and prob over 95% of the PV I see is a FAIL,

Ive had their electrical guy on one job and he has agreed that any I see is to be rectified without question,

seems this guy signed them all off on install as acceptable [subby work] , problem being, he had absolutely NO PV knowledge whatsoever and was doing something he shouldnt have been doing,

so, Im basically covering his ass for him, and he is hoping nothing goes wrong with the installs I dont see.

I dont have a problem, he is a decent bloke, and he now realises that he was only looking at the fact it was a 2.5 protected by a 16A OCPD,

and didnt realise the implications of everything else.

 

[binky]

2.5mm on 4kW domestic is ok, the inverter outputs 16A max, and 2.5 can handle 25A from memory

 

[binky]

Anyway, quite happy to look at incorporating anything into the products if the experts in the PV industry think we need to put them in, (yes that's some of you lot!), I did say some

Just to start you off again, I have been doing my homework today and have spoken to a very,very large inverter manufacturers technical helpline who has said that 1 in 3 inverter calls are now for high voltage cut outs, all of their inverters are set at 262v but they have been adjusting to 264v on request, in some cases the grid voltages have been upwards of 265-270v. Do you think this is solely down to the DNOs or maybe just maybe micro generation may be playing its part??

ah sorry me old mate Steptoe :coat

if they are seeing grid voltages like that, its probably a DNO issue, but I have always wondered what happens with loads of installs in the same area, especially if using not European equipment.

 

[matt hunt]

We need to look at Australia boys, especially Queensland, they have had so many systems installed that the main generation Companies are in crisis, (just looked at one of the posts on your forum titled 'solar has won') I know  first hand that their high voltage is a major issue to their generators, I realise they have a lot more sun than us but the simple fact is is that unless we control our voltages then we are going to have a problem for years to come

 

[steptoe]

2.5mm on 4kW domestic is ok, the inverter outputs 16A max, and 2.5 can handle 25A from memory

not when its

JB'd into an existing circuit / fed from the load side of an RCD that now refuses to trip / runs around the outside of the house for 'half a mile' / etc,etc,etc

never mind the PV cables that are lying loose in the loft just waiting for a new TV point to be added into the kids bedroom.......