Re: [AFMUG] Fusing batteries
I don’t want a shorted cell to take me down if I have more than one string of batts. So I downsize the circuit breaker to the lowest I can get away with. Big wires to prevent voltage drop. But the CB size in my central offices are more load than wire based. Just the opposite in a house where you don’t know the load that will be presented to a receptacle but want to maximize the current available to it. From: dmmoff...@gmail.com Sent: Thursday, January 6, 2022 8:07 AM To: 'AnimalFarm Microwave Users Group' Cc: 'Chuck McCown' Subject: RE: [AFMUG] Fusing batteries Yeah DIN breakers for those big ones. Or breakers that snap into the rectifier chassis. By the way, I thought the overcurrent device should be sized based on the amp capacity of the wire. I sometimes see people saying things like “I have an X watt device, so I need a Y watt fuse”. What’s the purpose to downsizing the fuse to match the device? From: AF On Behalf Of Chuck McCown via AF Sent: Wednesday, January 05, 2022 10:20 PM To: AnimalFarm Microwave Users Group Cc: Chuck McCown Subject: Re: [AFMUG] Fusing batteries I use circuit breakers. Sent from my iPhone On Jan 5, 2022, at 4:54 PM, TJ Trout wrote: How is everyone fusing your high current dc stuff? we use blade fuses and gmt fuses up to 15a, with inverters directly to the battery strings, granted they have internal breakers I really want to fuse them if that's a good idea but finding 100a fuses with a din rail etc is hard On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners wrote: Sorry, 50A being the circuit breaker. On Wed, Jan 5, 2022, 5:51 PM Colin Stanners wrote: 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If staying at 24V I'd recommend a 80-100A fuse in each series of batteries and maybe a 50A or in some cases lower fuse for the site. On Wed, Jan 5, 2022, 5:40 PM Steve Jones wrote: So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
Circuit breakers are simply better. The issue is they don't work very well in the low amperage world. Josh Luthman 24/7 Help Desk: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Wed, Jan 5, 2022 at 6:56 PM TJ Trout wrote: > How is everyone fusing your high current dc stuff? we use blade fuses and > gmt fuses up to 15a, with inverters directly to the battery strings, > granted they have internal breakers I really want to fuse them if that's a > good idea but finding 100a fuses with a din rail etc is hard > > On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners wrote: > >> Sorry, 50A being the circuit breaker. >> >> On Wed, Jan 5, 2022, 5:51 PM Colin Stanners wrote: >> >>> 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. >>> If staying at 24V I'd recommend a 80-100A fuse in each series of batteries >>> and maybe a 50A or in some cases lower fuse for the site. >>> >>> On Wed, Jan 5, 2022, 5:40 PM Steve Jones >>> wrote: >>> So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
Yeah DIN breakers for those big ones. Or breakers that snap into the rectifier chassis. By the way, I thought the overcurrent device should be sized based on the amp capacity of the wire. I sometimes see people saying things like “I have an X watt device, so I need a Y watt fuse”. What’s the purpose to downsizing the fuse to match the device? From: AF On Behalf Of Chuck McCown via AF Sent: Wednesday, January 05, 2022 10:20 PM To: AnimalFarm Microwave Users Group Cc: Chuck McCown Subject: Re: [AFMUG] Fusing batteries I use circuit breakers. Sent from my iPhone On Jan 5, 2022, at 4:54 PM, TJ Trout mailto:t...@voltbb.com> > wrote: How is everyone fusing your high current dc stuff? we use blade fuses and gmt fuses up to 15a, with inverters directly to the battery strings, granted they have internal breakers I really want to fuse them if that's a good idea but finding 100a fuses with a din rail etc is hard On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners mailto:cstann...@gmail.com> > wrote: Sorry, 50A being the circuit breaker. On Wed, Jan 5, 2022, 5:51 PM Colin Stanners mailto:cstann...@gmail.com> > wrote: 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If staying at 24V I'd recommend a 80-100A fuse in each series of batteries and maybe a 50A or in some cases lower fuse for the site. On Wed, Jan 5, 2022, 5:40 PM Steve Jones wrote: So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
I use circuit breakers. Sent from my iPhone > On Jan 5, 2022, at 4:54 PM, TJ Trout wrote: > > > How is everyone fusing your high current dc stuff? we use blade fuses and gmt > fuses up to 15a, with inverters directly to the battery strings, granted they > have internal breakers I really want to fuse them if that's a good idea but > finding 100a fuses with a din rail etc is hard > >> On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners wrote: >> Sorry, 50A being the circuit breaker. >> >>> On Wed, Jan 5, 2022, 5:51 PM Colin Stanners wrote: >>> 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If >>> staying at 24V I'd recommend a 80-100A fuse in each series of batteries and >>> maybe a 50A or in some cases lower fuse for the site. >>> On Wed, Jan 5, 2022, 5:40 PM Steve Jones wrote: So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
How is everyone fusing your high current dc stuff? we use blade fuses and gmt fuses up to 15a, with inverters directly to the battery strings, granted they have internal breakers I really want to fuse them if that's a good idea but finding 100a fuses with a din rail etc is hard On Wed, Jan 5, 2022 at 3:53 PM Colin Stanners wrote: > Sorry, 50A being the circuit breaker. > > On Wed, Jan 5, 2022, 5:51 PM Colin Stanners wrote: > >> 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If >> staying at 24V I'd recommend a 80-100A fuse in each series of batteries and >> maybe a 50A or in some cases lower fuse for the site. >> >> On Wed, Jan 5, 2022, 5:40 PM Steve Jones >> wrote: >> >>> So we have some 12v 190 ah batteries and are going to be running them in >>> series for 24 v and pairs in parralell if we need more capacity. >>> >>> Where all is fusing recomended and of what type and size? >>> These will be attached to 750w 1000w or 1500w ups depending on the site. >>> Most sites pull between 450 and 750 watts right now off the current >>> batteries >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
I would fuse them so that the max charge and discharge current can be handled. So add the current capacity of your charger to the load current and then a safety factor. No need to go too large. From: Steve Jones Sent: Wednesday, January 5, 2022 4:39 PM To: AnimalFarm Microwave Users Group Subject: [AFMUG] Fusing batteries So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
Sorry, 50A being the circuit breaker. On Wed, Jan 5, 2022, 5:51 PM Colin Stanners wrote: > 750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If > staying at 24V I'd recommend a 80-100A fuse in each series of batteries and > maybe a 50A or in some cases lower fuse for the site. > > On Wed, Jan 5, 2022, 5:40 PM Steve Jones > wrote: > >> So we have some 12v 190 ah batteries and are going to be running them in >> series for 24 v and pairs in parralell if we need more capacity. >> >> Where all is fusing recomended and of what type and size? >> These will be attached to 750w 1000w or 1500w ups depending on the site. >> Most sites pull between 450 and 750 watts right now off the current >> batteries >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
Re: [AFMUG] Fusing batteries
750 /24 = 31 amps. Sounds like it may be better to standardize on 48V. If staying at 24V I'd recommend a 80-100A fuse in each series of batteries and maybe a 50A or in some cases lower fuse for the site. On Wed, Jan 5, 2022, 5:40 PM Steve Jones wrote: > So we have some 12v 190 ah batteries and are going to be running them in > series for 24 v and pairs in parralell if we need more capacity. > > Where all is fusing recomended and of what type and size? > These will be attached to 750w 1000w or 1500w ups depending on the site. > Most sites pull between 450 and 750 watts right now off the current > batteries > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
[AFMUG] Fusing batteries
So we have some 12v 190 ah batteries and are going to be running them in series for 24 v and pairs in parralell if we need more capacity. Where all is fusing recomended and of what type and size? These will be attached to 750w 1000w or 1500w ups depending on the site. Most sites pull between 450 and 750 watts right now off the current batteries -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
