SPD to cover whole site?

[The Ghost]

I do mean the cost of downtime and production etc. Value of machines damaged and so on or potential danger if they stopped working etc. In terms of assaying the necessity against the cost. Looking at the regs I read it is about these matters as to whether you are going to use them and the calcs come when you do decide to put them in. One lady in a commercial unit has an embroidering machine that costs thousands and wanted SPD but again the cost put her off. So I said well get an SPD at the socket and put your machine in to that. So far so good! On the other hand in reception at another place they comms are for 60 units if that goes down then 60 odd businesses and the phone recording for some of them goes as well. A massive disruption. Again cost was the factor and was passed over. Look into the costing first.

 

[chrisdicko]

I do mean the cost of downtime and production etc. Value of machines damaged and so on or potential danger if they stopped working etc. In terms of assaying the necessity against the cost. Looking at the regs I read it is about these matters as to whether you are going to use them and the calcs come when you do decide to put them in. One lady in a commercial unit has an embroidering machine that costs thousands and wanted SPD but again the cost put her off. So I said well get an SPD at the socket and put your machine in to that. So far so good! On the other hand in reception at another place they comms are for 60 units if that goes down then 60 odd businesses and the phone recording for some of them goes as well. A massive disruption. Again cost was the factor and was passed over. Look into the costing first.

I see, that makes sense, thanks.

If we were to get a Surge, I presume most of the DB's and therefore machinery would be affected anyway, which would cost thousands. If it was the whole factory down, I think we'd loose £2500/hour in lost turnover.....although that may not be too accurate or true.

 

[Nigel]

I would suggest to managment a phased introduction. Pick the most vital of equipment to do first with a five year plan to achieve 100% compliance.

 

[Strima]

An SPD may very well not stop a surge in its tracks. On larger installations you need to stage it down so type 1 at the incomer then type 2 on each submain, each SPD reduces the surge down to acceptable levels.

 

[Strima]

An SPD may very well not stop a surge in its tracks. On larger installations you need to stage it down so type 1 at the incomer then type 2 on each submain, each SPD reduces the surge down to acceptable levels.

Finally Type 3 on equipment, such as surge protected socket-outlets.

 

[chrisdicko]

I would suggest to managment a phased introduction. Pick the most vital of equipment to do first with a five year plan to achieve 100% compliance.

Yes, good idea. We can only power down on Sunday's, so would probably take 5 years and no-one wants to work them, haha.

As said, these are new to me, do you install them before the main switch of each DB?

 

[chrisdicko]

An SPD may very well not stop a surge in its tracks. On larger installations you need to stage it down so type 1 at the incomer then type 2 on each submain, each SPD reduces the surge down to acceptable levels.

I see, great thank you

 

[Nigel]

Yes, good idea. We can only power down on Sunday's, so would probably take 5 years and no-one wants to work them, haha.

As said, these are new to me, do you install them before the main switch of each DB?

Needs to be connected correctly and BS7671 states exactly how.

 

[Deleted member 26818]

Yes, good idea. We can only power down on Sunday's, so would probably take 5 years and no-one wants to work them, haha.

As said, these are new to me, do you install them before the main switch of each DB?

SPDs are spurred off the main switch.