Slip ring failure of ABB AML 630L6A BAM
Slip ring failure of ABB AML 630L6A BAM
(OP)
Hi All,
I would like to have your thoughts on what coud be the cause of a detachment of a phase of the rotor winding from the slip ring, an explosion was seen. the détachement was internal as you can see on the photo attached.
the moment of the failure the relay tripped by (blocked rotor/direct power/Overload/undervoltage).
I would like to have your thoughts on what coud be the cause of a detachment of a phase of the rotor winding from the slip ring, an explosion was seen. the détachement was internal as you can see on the photo attached.
the moment of the failure the relay tripped by (blocked rotor/direct power/Overload/undervoltage).
RE: Slip ring failure of ABB AML 630L6A BAM
Converting energy to motion for more than half a century
RE: Slip ring failure of ABB AML 630L6A BAM
Muthu
www.edison.co.in
RE: Slip ring failure of ABB AML 630L6A BAM
There does not appear to be any means for inspecting the hidden damage.
The entire rotating portion of the machine needs to be dismantled.
It's a connection problem, not a slip ring failure.
John
RE: Slip ring failure of ABB AML 630L6A BAM
Converting energy to motion for more than half a century
RE: Slip ring failure of ABB AML 630L6A BAM
I don't see data related to motor power , voltage and rotor current. In any case, while you waiting for rotor repair , you should carefully check and look at the condition of the rotor resistor and switching equipment .
Good luck !
RE: Slip ring failure of ABB AML 630L6A BAM
The motor Data:
- Nominal power : 2800 KW
- Voltage : 5,5 KV
- Nomiunal Current : 364 A
- Speed : 994 RPM
By monitoring the power and the current we observed that before the breakdown by 4 days,an abnormal current fluctuation Min-max difference of 200 Amps, compared to what was recorded before (a more or less stable current), now that we have replaced the motor with a another one new the same fluctuation persists I'm afraid that the same failure will happen again for the new motor, for information it's a raw mill application in a cement plant.
Does a current fluctuation below the rated current cand do a damage to the motor?
For illustration please see picture attached (in green the power, in pink the current)
RE: Slip ring failure of ABB AML 630L6A BAM
Muthu
www.edison.co.in
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
Are you saying this failed motor is a synch motor? You should post the motor nameplate details.
Muthu
www.edison.co.in
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
Muthu
www.edison.co.in
RE: Slip ring failure of ABB AML 630L6A BAM
RE: Slip ring failure of ABB AML 630L6A BAM
This is a warranty repair.
The failure is hidden from view inside a tube. The end user didn't cause this.
The manufacturer of the apparatus needs to explain why their product failed.
John
Edit: Yes, the connection nut locking devices do not appear to be "factory", [but] it still looks like a warranty.