Electronics > Projects, Designs, and Technical Stuff
Looking for transients in 600V 3 phase system, need opinions
<< < (3/6) > >>
Sterno:
Line reactor is 6 inches above VFD.   Rated for 3.9A, 3%, 600V, 6.74mH.  Unit specified by VFD manufacturer
sibeen:
I'd be looking to hire a product that's dedicated to this sort of analysis. Dranetz, Hioki etc have units that do all the general electrical specs as well as capture transient over-voltages.
AlfBaz:
Can the VFD handle the motors regen? You said it's a conveyor motor, does it have a contactor on the vfd's output, input or both? Perhaps your rundown params are too aggressive or the motor's model parameters are incorrect
Sterno:

--- Quote from: AlfBaz on July 05, 2019, 01:47:36 am ---Can the VFD handle the motors regen? You said it's a conveyor motor, does it have a contactor on the vfd's output, input or both? Perhaps your rundown params are too aggressive or the motor's model parameters are incorrect

--- End quote ---
VFD is programmed to let motor coast to stop, belt moves very slowly, 10meters/min max, so no inertia to speak of.  Parameters have been checked repeatedly.

We're hunting for an Industrial Electrician who would have the necessary equipment and are considering installing a SPD such as this: https://www.intermatic.com/en/surge-protection/hard-wired-surge/ag6503l3 in the panel as additional protection.
floobydust:
Panel pic for all from your other post, but don't see the line reactor. It helps us to see what the panel looks like.

It's best to clamp surges at the source but we don't know what is generating them. I would rent some equipment to find out, it's cheaper than guessing.
Braking can kick up the DC bus voltage but is that where the 1100V MOV that blew is?
The SPD is just three MOV's inside, it clamps at 2,500V line-line which may be too high.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod