Jump to content

PV Plant Insulation Resistance Fault


El Pira Luz

Recommended Posts

Good day 

I have a 500KW system (5 x Sungrow 110KW) with 77 Strings of (7.1KW each).

Inv 1, 2, 3 and 5 are working well and are connected respectively to strings 1-15, 16-30, 31-45, 62-77. Inv 4 is not giving any output due to Low Insulation Resistance error and is connected to strings 46-61.

The strings connected to Inv 1,2,3 and 5 measure 730V between Terminals and half of that between each terminal and ground.

The strings connected to Inv 4 measure 730V between Terminals and the same between each terminal and ground. This is where I believe the problem is. 

Has anybody ever encountered this type of problems and whats the best way to fix it.

Thank you

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...