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Home > User galleries > rlshieldjr > Traffic Signals

Battery back-up

Keep signals operating for 2 hours before going to red flash.

CIMG0242.jpg CIMG4302.JPG CIMG0178.jpg CIMG5939.JPG WESTY_LUMI40W-WH.jpeg
File information
Filename:CIMG0178.jpg
Album name:rlshieldjr / Traffic Signals
Keywords:Traffic_Lights
Company and Date Manufactured:Myers
Model Number:PB-2000
Filesize:53 KiB
Date added:Jun 04, 2010
Dimensions:360 x 480 pixels
Displayed:6284 times
URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=2094
Favorites:Add to Favorites

Comment 17 to 36 of 36
Page: 1 - 2

Form109   [Jun 28, 2010 at 12:21 AM]
Form109
Does the Battery Charging System work like that of a Warning Siren?...cause on those the Batteries Charge for a Period of Time...then Charging Ceases for a while,after the While is Up the System checks the Batteries then charges them again.

Silverliner14B   [Sep 06, 2010 at 08:53 PM]
Silverliner14B
I noticed in Florida, in the event of a power outage the traffic signals simply go out. Drivers dont seem to treat them as stop signs so a policeman is required to direct traffic.

GullWhiz   [Sep 06, 2010 at 11:49 PM]
GullWhiz
Around here, it varies! If it goes out completely...police gets involved......There may be some systems that have battery packs.....but some don't....

joe_347V   [Sep 08, 2010 at 03:06 AM]
joe_347V
I recall the traffic lights here simply going out when they lose power and drivers are expected to treat them as a 4 way stop but most of the busier streets need police involvement to direct traffic.

rlshieldjr   [Dec 13, 2010 at 06:37 PM]
rlshieldjr
Many of the batteries are in need of replacement now, they last about 3-5 years. sometimes only one will fail and show a full voltage but dies under load. We found a few intersections in need of batteries during our last inspection.

rjluna2   [Dec 13, 2010 at 06:58 PM]
rjluna2
That is the responsiblity of maintaing UPS box by replacing those batteries. I have 5 UPS is being used at home for each computers at home (2, my father, 1, my mother and 2 for myself). One at work Cool

SeanB~1   [Dec 14, 2010 at 03:31 PM]
SeanB~1
UPS maintenance is expensive when you replace batteries that are aging, especially with the UPS at work, that uses a half gross of 7AH SLA cells.

The UPS in my office is older tech, uses 3 car batteries in series, or now 36 of the best of the other ups batteries in a series/parallel stack.

streetlight98   [Aug 01, 2011 at 11:37 PM]
streetlight98
here when the power goes out, the signals go completly out.

joe_347V   [Aug 02, 2011 at 02:39 AM]
joe_347V
There's a few controllers here with a additional box on the cabinet which I'm guessing is a backup battery.

basilicon89   [Aug 02, 2011 at 05:55 AM]
basilicon89
Our newer cabinets have transfer switches mounted to the side of the cabinet

streetlight98   [Sep 26, 2012 at 12:24 AM]
streetlight98
I noticed here when the power goes out the signal goes dark, but some signals will go into flashing mode when the power comes back after it's out for a while while others will resume their normal operation.

basilicon89   [Sep 26, 2012 at 12:49 AM]
basilicon89
depends on how the cabinet is programmed for start up state...usually all-red, or flashing for a minute or so before going into normal operation. Going straight into operation seems like a unique thing. My cabinet is set for 30 seconds of flashing red in all directions before going into normal operation following powerup.

streetlight98   [Sep 26, 2012 at 01:08 AM]
streetlight98
The ones i'm referring to will continue to flash for up to a week if the power outage is long enough. I'm not sure if they eventually go back to normal on their own or if a worker has to reset it or something...

basilicon89   [Sep 26, 2012 at 01:34 AM]
basilicon89
A lengthy flash state is due to a tripped conflict monitor that needs the brownout fault reset by a technician. Newer models of monitors self reset for power outages.

rlshieldjr   [Sep 29, 2012 at 01:08 AM]
rlshieldjr
They could be on flash because no one reported them. Another problem is that the line to the cabinet suffered severe over voltage such as a lightning strike or a primary (2-16kV) touched the 120v line. Rain water may have shorted across two colors tripping the MMU / CMU, and the intersection was now a large one, and not a priority compared to others.

traffic light1   [Dec 23, 2012 at 01:42 AM]
traffic light1
I like LED traffic lights Cool .

SeanB~1   [Dec 23, 2012 at 04:39 AM]
SeanB~1
There are now 2 sets of lights in the city with solar powering, using battery packs and inverters. I do not know how they are wired, but I think they have grid tie inverters driving a standard large ups as they do say they feed power to the grid.

Would be nice if Eishkom allowed grid tie inverters to be connected, it would make life easy to add solar electricity to a house.

rlshieldjr   [Sep 04, 2013 at 05:01 AM]
rlshieldjr
I replaced a bypass switch in a BBS like this. It is the rotary switch in the upper right. Also some more batteries have failed and will have to be replaced.

rlshieldjr   [Oct 31, 2015 at 06:46 PM]
rlshieldjr
We had problems now - had several of these vandalized and batteries stolen, we since put on heavier locks.

SeanB~1   [Oct 31, 2015 at 08:09 PM]
SeanB~1
Is the lead price up again, that is normally what happens to those cells, sold for scrap value.


Comment 17 to 36 of 36
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