Input Fuse to Drive Blown
Dear All,
We have 3 nos. ACS880-04-721A-7 for 3 nos. 650 kW, 690V motor.
2 working + 1 standby.
Normally running in 900 rpm fixed speed.
After running 7/8 days , one of the input fuse having rating of 1250A, 700v blown. Fuse is bussmann make.
This happens for different phase each time.
After replacing the fuse it ran for 8/9 days. Again same.
What would be reason and solution.
Thanks in advance.
We have 3 nos. ACS880-04-721A-7 for 3 nos. 650 kW, 690V motor.
2 working + 1 standby.
Normally running in 900 rpm fixed speed.
After running 7/8 days , one of the input fuse having rating of 1250A, 700v blown. Fuse is bussmann make.
This happens for different phase each time.
After replacing the fuse it ran for 8/9 days. Again same.
What would be reason and solution.
Thanks in advance.
Asked 7 months ago
Answers
0
Hi
the possible causes of breakage of a fuse in input to your drive may be different and as I have not seen the system I can only make conjectures.
One of these could be a random problem at the power line, which you can control with a recorder to verify that it does not fluctuate during the fuse failure.
Does the problem occur only on one of the drives or has it happened to others?
I suggest you let the ABB service intervene, which is equipped for this type of failure and can help you with the solution.
BR
Flavio
the possible causes of breakage of a fuse in input to your drive may be different and as I have not seen the system I can only make conjectures.
One of these could be a random problem at the power line, which you can control with a recorder to verify that it does not fluctuate during the fuse failure.
Does the problem occur only on one of the drives or has it happened to others?
I suggest you let the ABB service intervene, which is equipped for this type of failure and can help you with the solution.
BR
Flavio
0
Hi,
I don't know the details of your application.
Did you measure the input current of the inverters, when they are working at nominal/max load?
Just what I found in the HW manual for your drive - ABB recommend input fuses 1500A/690V for ACS880-04-721A-7 !
I don't know the details of your application.
Did you measure the input current of the inverters, when they are working at nominal/max load?
Just what I found in the HW manual for your drive - ABB recommend input fuses 1500A/690V for ACS880-04-721A-7 !
Source: ACS880-04-721A-7 HW manual
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