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radarcontact
Associate
November 25, 2024
Solved

STPM3x Evaluation Board Shorting

  • November 25, 2024
  • 1 reply
  • 1433 views

 

I am working with the STPM34/STPM33 chip and using the STPM34 evaluation board. I have noticed in my own hardware and the eval boards that when you attach power to measure voltage it shorts something and blows up. 

Is this a known issue? Is there a known solution. 

I attached a photo. Looks like a resistor that's blowing. 

 

IMG_2342 copy.jpg

Best answer by radarcontact

Hi Peter, 

 

Thanks for your reply. I think I figured this out. It's when you reverse neutral and L1 it will blow. 

1 reply

Peter BENSCH
Peter BENSCH
Technical Moderator
February 3, 2025

Unfortunately, you have not shown how you have connected your setup. I can see the connection wires of the Rogowski coils, but otherwise a blue and a brown wire for mains. Blue is usually connected as neutral, brown as live. Is that the same for you?

How is L2 connected?

Regards
/Peter

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R
radarcontactAuthorAnswer
Associate
February 3, 2025

Hi Peter, 

 

Thanks for your reply. I think I figured this out. It's when you reverse neutral and L1 it will blow. 

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