24kw diesel genset arcs when breaker engaged - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by [email protected], this thread has received 6 replies and been viewed 733 times.

 
LinkBack Thread Tools Display Modes
post #1 of 7 (permalink) Old 11-27-2017, 08:51 PM Thread Starter
Junior Member
 
Join Date: Sep 2010
Posts: 6
Points: 32,808
Thanks: 0
Thanked 0 Times in 0 Posts
24kw diesel genset arcs when breaker engaged

Its a Chinese made 24kw 4 cyl genset. Brushless diesel.

Engine starts clean, achieves 1800 rpm, voltage on meters are good 115/230.

Runs fine until I engage the 100amp breaker. Voltage readings disappear and load is not powered.

The control fuse on the 8amp AVR board pops.

Changed AVR board, still same fuse blows on new board.

Breaker inside in building is opened and there is no load connected at all, fuse blows.

Breaker is 3-pole. Breaker is also connecting and lifting the neutral from the windings.

I put an extra large fuse in the control AVR board and tested the following way ...

I flip the 3-pole breaker on and off real quickly and there is arc'ing in the windings when I do this.

It appears there is a short somewhere in the windings to the chassis/frame. With the 3-pole breaker OPEN, I can apply a 240 volt heater load to the windings side and it operates beautifully. Electric Heater warms and engine purrs.

If only I didn't need a neutral I'd be golden.

Any thoughts ?

Since it is brushless I was hoping to find a diagram of the windings. I can deal with half power even if I had to disconnect some windings to get any output.
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old 11-27-2017, 11:25 PM
Junior Member
 
Jasong's Avatar
 
Join Date: Feb 2015
Location: Plant City Fl
Posts: 309
Points: 29,947
Thanks: 41
Thanked 26 Times in 25 Posts
Bad breaker?
Jasong is offline  
post #3 of 7 (permalink) Old 11-29-2017, 02:44 PM Thread Starter
Junior Member
Threadstarter
 
Join Date: Sep 2010
Posts: 6
Points: 32,808
Thanks: 0
Thanked 0 Times in 0 Posts
cannot upload image

Trying to upload a file form my p.c. its a .jpg

Size on my end is 420k.

Upload fails ??!?
post #4 of 7 (permalink) Old 11-29-2017, 10:20 PM
Junior Member
 
Jasong's Avatar
 
Join Date: Feb 2015
Location: Plant City Fl
Posts: 309
Points: 29,947
Thanks: 41
Thanked 26 Times in 25 Posts
Too low of a post count.
Jasong is offline  
post #5 of 7 (permalink) Old 11-30-2017, 02:33 PM Thread Starter
Junior Member
Threadstarter
 
Join Date: Sep 2010
Posts: 6
Points: 32,808
Thanks: 0
Thanked 0 Times in 0 Posts
leaving

Well this user is now leaving to go to another forum. I had photo of burnt winding and arcing to share. Guess not.

And thanks for the hint (NOT) that wasted an hour of my time trying to figure out what I was doing wrong. Geesh.
post #6 of 7 (permalink) Old 12-01-2017, 08:00 PM Thread Starter
Junior Member
Threadstarter
 
Join Date: Sep 2010
Posts: 6
Points: 32,808
Thanks: 0
Thanked 0 Times in 0 Posts
only 1.5 ohm

Just measured the field winding resistance. Should be about 30 ohms and it reads 1.5 ohms. When connected to AVR it blows 15 amp control fuse thereon.
post #7 of 7 (permalink) Old 12-03-2017, 10:37 AM
Junior Member
 
Jasong's Avatar
 
Join Date: Feb 2015
Location: Plant City Fl
Posts: 309
Points: 29,947
Thanks: 41
Thanked 26 Times in 25 Posts
Is the short winding to winding or to the case?
I ask because you were able to apply a load to them earlier with no issues.
If it's to the case there may be debris causing that, not a blown winding. The core of the alternator can be pulled and cleaned. Re-meter the windings with it out.
Jasong is offline  
Reply

Tags
arcing, brushless, diesel, generator, windings

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Kohler Genset Controller mathura General Diesel 26 06-14-2013 07:36 PM
3208 genset Spindrift Medium and Heavy Duty 14 12-19-2011 08:22 PM
3/4 snap on ratchet, breaker bar, and handle flyin05 Everything Else 1 07-04-2011 02:33 AM
Back up genset budtoh3zo The Parking Lot 32 02-04-2010 09:23 PM
DIY Breaker Box whanner 2003-2007 6.0L Power Stroke 7 10-05-2009 01:31 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome