The Craftmans Shop > New from Old
Yet another Beaver resurection (TC20F)
philf:
Andrew,
Our hydroelectric scheme uses Siemens permanent magnet servo motors rated at 55 kW. To spin the 6 ton Archimedes screws up to speed before we let the water in only takes about 2.5 kW. It does ramp up slowly.
Phil.
JeffK:
Try these - the main plate does say the high running current is 78 amps but I didn't expect it to draw this for a low load cut.....I have got a couple of 63A type D breakers heading this way - if it needs more I will have to do something different with the distribution board....
Anyway got to fix the field current issue first. Hopefully the high draw is related to that.
cheers
Jeff
awemawson:
Although obviously an AC 3 phase rather than DC motor, it's rating is (perhaps not surprisingly) very similar to mine :thumbup:
My field driver gives about 160-170 V DC at about 7 amps so circa 1 kW so about 1/27 of the motor rating
Are you sure that the second plate you label as the field is not the cooling fan for the main motor ? Certainly a 2cw6-145-8 is a blower motor but a quick google doesn't show your 2cw6-166-8. The first plate is giving the specs for the motor in-built tacho.
ddmckee54:
I've been working with American motors and their data plates for 40 years and I've got no clue what those data plates are trying to tell us.
Stupid question/s, does this spindle motor have a separate cooling fan motor and is that motor running? It looks like your spindle motor has a thermistor/s to monitor winding temperatures. Siemens will do that on a lot of motors as an option, on their "bigger" motors thermistors are pretty much standard equipment. If the spindle motor has a separate motor for cooling, this motor should basically come on when you power up the system. If the cooling fan wasn't running you'd get over-temp alarms. Maybe not when the spindle motor is running no-load, but it would happen with a load on the motor.
You might get "lucky" and have a spindle cooling fan motor problem instead of a spindle motor problem.
Don
awemawson:
Sorry Don I got into your post erroneously intending to edit mine :bang:
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