circuit-breaker allegedly "getting more sensitive"

Anecdotal, of course, but something that can alleviate the tripping issue, is to replace with a C type.

I was under the impression Alcomax that the thermal element of the circuit-breaker (CB) was the same irrespective of it being B, C or D and only the magnetic in-rush was different. The replacement of the CB with a C or D wouldn't alter the time of an overcurrent caused by too many heaters/kettles etc but would only help if say a tool transformer or welder were connected by not responding to the high inrush current.

Hi Persp, how are you involved?

The client heard about me (only the good bits I presume!) WB and decided that I might be able to come up with an alternative to the £15k he'd been quoted 15? and 10? years ago by WPD's predecessors for an increased supply of unknown kVA...........

Did the old breakers go in the general waste bin?

Not that I'm aware, but I'll try and retrieve them and bench test one of them with 10 A and then 16 A.

How heavily loaded is the electric bill compared with the bookings?

The units used last month equated to a steady state load of 5.2 kW and the meter is semi-intelligent and recorded a peak of 20.3 kW, presumably the maximum half-hour demand average for last month. I found 12 hook up points but need to check if any more hidden away............


From the 20.3 kW I'd say he's on a tightrope especially since not all pitches have access to a hook-up. He plans to extend to 50 pitches plus a shower block and wants me to use my crystal ball and reapply for a 3-ph supply,,,,,, I've yet to advise him about monthly availability charges once he's over 69 kVA or that he'll need and H-pole set up for a Tx over 100 kVA........ the crystal ball is still hazy but at least 120 kVA for 50 pitches plus stored hot water is likely to appear. Two spans of a third HV conductor also required. I'm thinking nearer £20k as the existing pole is only two years old, stout and double stayed so probably won't need renewing. I'll just have to have another meeting and give him some ideas.


He won't have bulk LPG on site even though there must be a quantity of smaller bottles in the caravans.... 


Previous experience of camp sites tells me that after this plan, he'll be looking at a visitor shop, laundry facilities, upgraded sewerage, more lights, manager's residential park home, it goes on..........


Regards


BOD

Anecdotal, of course, but something that can alleviate the tripping issue, is to replace with a C type.

I was under the impression Alcomax that the thermal element of the circuit-breaker (CB) was the same irrespective of it being B, C or D and only the magnetic in-rush was different. The replacement of the CB with a C or D wouldn't alter the time of an overcurrent caused by too many heaters/kettles etc but would only help if say a tool transformer or welder were connected by not responding to the high inrush current.

Hi Persp, how are you involved?

The client heard about me (only the good bits I presume!) WB and decided that I might be able to come up with an alternative to the £15k he'd been quoted 15? and 10? years ago by WPD's predecessors for an increased supply of unknown kVA...........

Did the old breakers go in the general waste bin?

Not that I'm aware, but I'll try and retrieve them and bench test one of them with 10 A and then 16 A.

How heavily loaded is the electric bill compared with the bookings?

The units used last month equated to a steady state load of 5.2 kW and the meter is semi-intelligent and recorded a peak of 20.3 kW, presumably the maximum half-hour demand average for last month. I found 12 hook up points but need to check if any more hidden away............


From the 20.3 kW I'd say he's on a tightrope especially since not all pitches have access to a hook-up. He plans to extend to 50 pitches plus a shower block and wants me to use my crystal ball and reapply for a 3-ph supply,,,,,, I've yet to advise him about monthly availability charges once he's over 69 kVA or that he'll need and H-pole set up for a Tx over 100 kVA........ the crystal ball is still hazy but at least 120 kVA for 50 pitches plus stored hot water is likely to appear. Two spans of a third HV conductor also required. I'm thinking nearer £20k as the existing pole is only two years old, stout and double stayed so probably won't need renewing. I'll just have to have another meeting and give him some ideas.


He won't have bulk LPG on site even though there must be a quantity of smaller bottles in the caravans.... 


Previous experience of camp sites tells me that after this plan, he'll be looking at a visitor shop, laundry facilities, upgraded sewerage, more lights, manager's residential park home, it goes on..........


Regards


BOD