Ken Roach
Lifetime Supporting Member + Moderator
Anyone out there using Kinetix 5500 drives with a nominal 480V input ?
This should be a basic electricity question, but I don't know what's going on.
I have four of them in the field that are getting 3-phase 490V but the DC bus voltages are showing 750V DC when the drives have precharged and are idle.
I was expecting about 1.44 x 490 = 690 V on the DC bus. My recollection from when we wired these up in our shop is that it was definitely under 700V, but now they're in the field and we're getting bus regulator faults and weird voltages.
So: anyone running these at 480V input who can go look at their DC bus voltage display for me ?
This should be a basic electricity question, but I don't know what's going on.
I have four of them in the field that are getting 3-phase 490V but the DC bus voltages are showing 750V DC when the drives have precharged and are idle.
I was expecting about 1.44 x 490 = 690 V on the DC bus. My recollection from when we wired these up in our shop is that it was definitely under 700V, but now they're in the field and we're getting bus regulator faults and weird voltages.
So: anyone running these at 480V input who can go look at their DC bus voltage display for me ?