ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
nec 110.3 (B)
by gfretwell - 09/22/21 11:11 PM
Grounding electrodes
by gfretwell - 09/07/21 03:41 PM
Looking For Electricians in the Midlands
by Alex247 - 09/06/21 05:26 AM
New in the Gallery:
Now you know.
Now you know.
by Tom_Horne, September 7
February, North East Indiana
February, North East Indiana
by timmp, July 25
Who's Online Now
1 members (HotLine1), 46 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Nov 2002
Posts: 790
W
wa2ise Offline OP
Member
And not a bad neutral.
[Linked Image from wa2ise.com]
Some excitement today, a thunderstorm. we had a power failure today where the lights didn't completely go out. Line voltage ended up varying from 20V to 50V and at a peak of 70V. Seems lightning hit the distribution lines, and took out only two of the three phases. And I was on one of the impacted phases. Seems I was seeing power leakage thru power customers that get fed all 3 phases, and have loads connecting from one phase to another (208V). That would make a leakage path that would work its way back thru pole pig transformers back to the distribution lines and then to my pole pig.

I shut down my air conditioners and fridge, as compressors really don't like under voltages. Computer power supplies don't much like it either.

Later, once Pubic Service fixed it, saw a picture on FB of line crews in bucket trucks attending to the lines. And saw that 2 of the 3 phases were broken. One of the broken phases was the one I'm on.

To add to the fun, some LED bulbs could operate up to half their usual brightness during this event. Others didn't light at all. Incandescents showed most directly the voltage variations.

Joined: Jul 2004
Posts: 9,663
Likes: 4
G
Member
Back circuits can do strange things. Hopefully everything survived. I have seen 3 phase motors limp along on 2 fairly often but they are hot and not really doing well in the power department.


Greg Fretwell
Joined: Apr 2002
Posts: 7,279
Likes: 3
Member
Just be thankful you don't have JCP&L.

FWIW, the Municipal Complex here was dark from Tuesday afternoon until early Friday morning from a tree down and four poles. 26KV, 13/2KV, a few pole mounted transformers and capacitors.

Crew from Oklahoma did the replacements.


John

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
HCE727
HCE727
Delaware County, PA, USA
Posts: 187
Joined: November 2005
Top Posters(30 Days)
timmp 3
FGBY 2
Popular Topics(Views)
283,041 Are you busy
216,770 Re: Forum
203,168 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5