Burdekin
Chief Bodger
- Messages
- 6,685
- Location
- Aberdeen
It drives the milling machine and drill press so assumed not it?Have you checked the voltage at the source?
It drives the milling machine and drill press so assumed not it?Have you checked the voltage at the source?
How do I test that? I'm not familiar with three phase electrics and it's scary when you don't really know what your doing.Any voltage after main switch?
Excellent thanks for taking the time. Will check them this afternoon.Take these 3 fuses out, then with the power on check the voltage across each of them in pairs, so 1st & 2nd, 1st & 3rd and 2nd & 3rd, they should all be very similar.
Then check voltage from each fuse to earth.
Make sure you have your multimeter on AC voltage and on the correct range. Edited to attach photo.
View attachment 380528
That would be awesome thanks. I have a bit of time after work tonight to do some checks but if I can't nail it down will send you a message.If you don't get it running before the weekend, I don't mind having a look at it for you on Saturday. I'm in Aberdeen and an electrician
Thanks will do.Forget about continuity. Plug your lathe into the converter.
Switch your multimeter to AC and 600V range. Between phases you should see 400 to 420V roughly. You need to check each phase against each other.
So:
L1 to L2 and L1 to L3 and L2 to L3
Open that big isolator switch and check that you have voltage. on the incoming side.
Then close it back up and trace the wiring inside the lathe. I presume it goes to them big fuses.
Switch that isolator on, and test the same again at the fuses.
You've probably got a fuse out. in which case rip them out and fit a three pole mcb suitable for the requirements of your lathe.
Nothing apart from another way to turn the machine off and on once big isolator was on. It came from a college.what does the white starter box next to main isolator do?
So in effect you have two switches in series….you need to test each on in turn Or …Disconnect from power and pull the 3 big fuses in the box, but both switches in the on position and check continuity through on each phase. If all three phases are good, you then need to move further through the circuit.Nothing apart from another way to turn the machine off and on once big isolator was on. It came from a college.
Yes. I was thinking of giving the isolator contacts a wee sand and some vaseline and see if that does the trick. I touched the push button switch and looks like the tape is holding the cover on.So in effect you have two switches in series….you need to test each on in turn Or …Disconnect from power and pull the 3 big fuses in the box, but both switches in the on position and check continuity through on each phase. If all three phases are good, you then need to move further through the circuit.
Id not start taking things to bits until you've established where the fault is. Its unlikley all three phases would be faulty. If its was working and just stopped, your looking for something that stops everything.Yes. I was thinking of giving the isolator contacts a wee sand and some vaseline and see if that does the trick. I touched the push button switch and looks like the tape is holding the cover on.