madkayaker
Pro sparkey Pro Welder
- Messages
- 13,678
the machines should have motor overload relays built in as part of the control gear so that protects the machine. as long as they haven't been turned up to far
- Thread starter astro_al
- Start date
madkayaker
Pro sparkey Pro Welder
- Messages
- 13,678
in that case its work out the current draw and use panel fuses the motors will be less than 750w i bet so only a few amps
brightspark
Member
- Messages
- 41,272
- Location
- yarm stockton on tees
in industry nearly all machines and motors have overload protection coils fitted because if overloaded and left a hefty bill will ocurr but for private use most wont bother . i havent any on any of my gear as its not left running unatended
madkayaker
Pro sparkey Pro Welder
- Messages
- 13,678
if its less than 750w then no need for DOL starter but i would recomend them always as set correctly they will save the expense of rewireing/ new motor
madkayaker
Pro sparkey Pro Welder
- Messages
- 13,678
with 3/ph safe is the only way
Drains
Yeah, nah.
- Messages
- 7,718
- Location
- Sefton, South Island, NZ
Well I do, for one. You should try it Al. Next job in the workshop, dab of oil/ vaselene or a squirt of WD40. Makes all the difference.
brightspark
Member
- Messages
- 41,272
- Location
- yarm stockton on tees
just noticed post the plug will carry 16 amp max full load but the supply fuse feeding the socket can be less depending what load u apply they could be down rated to 6 amp 10 amp or 16 amp as long as there not rated more than 16 amp if your running diffrent machines at diffent amperages they need to be fused at there respective currents not the plug size
Ah ok. You're probably right. One day... (Actually the distro board is full - how the hell do people find boards big enough to supply everything, with three phase they fill up fast - and I've only got 6 sockets and some 1 phase crap (lighting, ring main, roller door etc) wired to it.
Good idea Drains, I'll defo try it.
Al.
Good idea Drains, I'll defo try it.
Al.
brightspark
Member
- Messages
- 41,272
- Location
- yarm stockton on tees
most machines in workshops are wired through a 3 phase 30 amp ring main or even larger depending on the load and cable size. various size switchfuses or mcb are sited round the ring to supply the machines at the rated current they require meaning that only 3 ways are taken up on the distribution board to feed maybee 6 machines depending on the full load of all machines running. using diversity is the word
Motor overload protection is protection if your motor is having to work harder than it was designed to do. ie look at the Full load current of the motor and then set your overloads to suit. Fuses in a machine are there for short circuit protection. They both behave differently. Just for info.
Also they manufacture splitters for the purpose you need, trying to design your own Busbar system, is likely to end up in you going up in a puff of smoke at a later date
Better to have multiple correctly rated circuits and 1 splitter on each, than trying to cram it all in a busbar chamber and trapping a wire one time your trying to fix it and it gong bang.
Also 3 phase boards come in rather large sizes to accomadate industrial appliations and if you run out of room when just install another board.
trust me i been playing about with the stuff for 22 years as an industrial maintenance engineer.
regards
Mac
Also they manufacture splitters for the purpose you need, trying to design your own Busbar system, is likely to end up in you going up in a puff of smoke at a later date
Better to have multiple correctly rated circuits and 1 splitter on each, than trying to cram it all in a busbar chamber and trapping a wire one time your trying to fix it and it gong bang.Also 3 phase boards come in rather large sizes to accomadate industrial appliations and if you run out of room when just install another board.
trust me i been playing about with the stuff for 22 years as an industrial maintenance engineer.
regards
Mac
