VSR

[pvb]

Depends on engine, but as VSR is engaged it still has a battery connected.

But the battery isn't being charged, so the VSR would drop out.

With a alternator connected battery side, the alternator is permanently live when boat is not in use, regulator is therefore drawing power 24/7.

Many small boat diesels are wired that way, without problems.

 

[halcyon]

But the battery isn't being charged, so the VSR would drop out.



Many small boat diesels are wired that way, without problems.

Okay I'll buy it, if the engine is running, why is the VSR not engaged.

If turning of the battery isolator accendly is this common should we not look at the power supply to all our electronic nav equip and communication systems ? that could be a major danger.

Brian

 

[pvb]

Okay I'll buy it, if the engine is running, why is the VSR not engaged.

You suggested wiring the alternator output to the starter motor connection. If the isolator switch is turned off, there'll be no feed to the VSR. Maybe I'm misunderstanding what sort of circuit you have in your head - why not post a diagram?

 

[halcyon]

You suggested wiring the alternator output to the starter motor connection. If the isolator switch is turned off, there'll be no feed to the VSR. Maybe I'm misunderstanding what sort of circuit you have in your head - why not post a diagram?

VSR feeds from either or both batteries, or for that matter with a 3 or 4 bank system it still feeds from all batteries.

Brian

 

[pvb]

VSR feeds from either or both batteries, or for that matter with a 3 or 4 bank system it still feeds from all batteries.

But the VSR only connects when there's charging voltage. You'll have to post a diagram if you want to explain what you're thinking.

 

[halcyon]

But the VSR only connects when there's charging voltage. You'll have to post a diagram if you want to explain what you're thinking.

If there is no charge voltage whats the damage to the alternator ? it's not charging.

This is getting complicated, we now need the engine isolator to be turned off accidentally with the engine running, but not charging the battery, do we need a sunny day as well ?

Brian

 

[pvb]

If there is no charge voltage whats the damage to the alternator ? it's not charging.

This is getting complicated, we now need the engine isolator to be turned off accidentally with the engine running, but not charging the battery, do we need a sunny day as well ?

I'm sure you know what you want to write, but it's not very clear to me. If you can't explain with a diagram, I think we'll have to agree to differ.

 

[halcyon]

I'm sure you know what you want to write, but it's not very clear to me. If you can't explain with a diagram, I think we'll have to agree to differ.

I'm afraid you have lost me.

We started of with accidently turning off the engine battery, if you have a VSR you will kill the alternator, so connect the alternator to the battery direct.

But new engines are electric stop, no battery no engine, so it needs to be an old engine with manual stop.


But the VSR will be engaged so domestic battery is connected, but not if the engine is not charging.

But if it's not charging, what has the VSR to do with the diagram and wiring alternator direct to battery?

Brian

 

[Len Ingalls]

Download this link, 400 amp start, 800 amp surge http://www.kddpowercentre.co.uk/data/11.pdf

Brian

Thanks for link. Looks like HD gear. / Len

 

[PabloPicasso]

So 6 AWG wire from start battery to vsr and house batt then? It's a one way vsr. Does it need. An n one fuse, if so. What type?

This is more complicated than I thought. Perhaps 1 2 both off switch would be easier

 

[VicS]

So 6 AWG wire from start battery to vsr and house batt then? It's a one way vsr. Does it need. An n one fuse, if so. What type?

This is more complicated than I thought. Perhaps 1 2 both off switch would be easier

Yes fuses at each battery connection.

A selector switch might be easier to install but it then needs to be operated correctly . A vsr once fitted can almost be forgotten and left to look after the charging without intervention.

A VSR is only complicated if you try to follow all the BS in the above posts.e
The only things Id add to the basic diags at the beginning of the thread are the fuses and the ( optional ) switch in the VSR neg to disable it if /when appropriate

 

[halcyon]

Yes fuses at each battery connection.

A selector switch might be easier to install but it then needs to be operated correctly . A vsr once fitted can almost be forgotten and left to look after the charging without intervention.

A VSR is only complicated if you try to follow all the BS in the above posts.e
The only things Id add to the basic diags at the beginning of the thread are the fuses and the ( optional ) switch in the VSR neg to disable it if /when appropriate

Thought I had given a simple answer in #14, it all got complicated after.

Brian

 

[VicS]

Thought I had given a simple answer in #14, it all got complicated after.

Brian

Dont disagree with you there but I might have queried connecting the VSR to the switched side of the isolators because that means the isolators have to be closed when using a battery charger ........ OTOH ...

Oh heck it's getting complicated again!

Nearly everything you do with boat electrical systems seems to be a compromise one way or another.