ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 10
Admin 4
Recent Posts
Any UL 508 experts out there?
by sparkyinak. 05/21/17 08:57 PM
Heat pump conundrum
by sparkyinak. 05/21/17 08:49 PM
Interesting week
by HotLine1. 05/20/17 11:57 AM
Electrical Pricing Guide
by ElectricianBud. 05/18/17 12:17 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
236,058 Are you busy
170,953 Re: Forum
164,071 Need opinion
Who's Online Now
1 registered members (brsele), 70 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#59619 - 12/09/05 09:23 PM Street Lighting  
distributor x  Offline
Member
Joined: Jul 2005
Posts: 57
Canada
I was driving home last night, and the HPS streetlighting all along the freeway was strobing, flashing on and off approx once per second.

I did not think it was possible for HPS to have such a quick restrike time

What could have caused this?


Work Gear for Electricians and the Trades

#59620 - 12/10/05 05:45 AM Re: Street Lighting  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
The Lucalox Superlife have no re-strike time, there are some other lamps made like this as well.
http://www.gepc.pl/lighting/do_pobrania/Lucalox%20-%20Ulotka%20(angielski).pdf

Also, on page 4 they have a short explaination of why they might be blink off and on, possibly due to wind or traffic vibration? Next guess would be strange voltage disturbance?


Mark Heller
"Well - I oughta....." -Jackie Gleason

#59621 - 12/10/05 09:06 AM Re: Street Lighting  
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
I once went to a seminar put on by a lighting manufacturer. The only thing that I remember about the context is the fact that if a HPS fixture cycles on and off, it is the bulb. Through the years, I have followed this rule, and have found it to always be true.


Earl

#59622 - 12/10/05 09:54 AM Re: Street Lighting  
jwhite  Offline
Member
Joined: Dec 2005
Posts: 64
Trenton, NC, USA
the restrike time is proportioinal to how hot the bulb is. if the bulb is not hot because it didnt light completely before the next power interuption it will restrike faster.


#59623 - 12/10/05 02:37 PM Re: Street Lighting  
mxslick  Offline
Member
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Some years back a shopping center had the same thing happening to an entire parking lot. They later found the cause when the circuit breaker caught fire. (It was arcing internally until it finally failed.)

So I would think that anything which causes an arc fault on the circuit would cause that effect. (Bad underground splice/feeder, etc.)

Arc faults would chop the current so fast that the bulb wouldn't go completely out, so it can strobe faster than the igniter would pulse it.

Were you a good samaritan and called the highway dept.? [Linked Image]


Stupid should be painful.


Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,138
Joined: May 2003
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 14 (0.003s) Memory: 0.7680 MB (Peak: 0.9061 MB) Zlib enabled. Server Time: 2017-05-22 15:26:30 UTC