Aldridge Traffic Controllers in Sydney Australia identified a market for the application of Uninterruptible Power Supply systems to backup the supply of mains ac power to Traffic Signal Controllers, such as its ATSC4 model.
ATC found that critical infrastructure such as Traffic Signal intersections were at the mercy of the reliability of the local energy authority and this would have a material impact on the efficient management of road traffic in urban centres around the world.
With this view in mind and the fact that governments around the world want to minimize any problems with the flow of goods and services in its urban road network, ATC devised and integrated a UPS and interface circuits with the ATSC4 Traffic Signal Controller.
This means that in the event of a loss of mains ac in the short term that the UPS will allow the Traffic Signal Controller to continue operating road traffic intersections smoothly and without any impact on the road user.
In the event that a power outage is going to last longer than the standby time of the UPS, the product allows for a portable generator set to extend the time the intersection is powered.
The portable generator set option can practically provided limitless backup time (subject to the quantity of fuel used by the portable generator set).
More importantly, the UPS for Traffic Signal Controllers is an option for the 240vac/50Hz and 110vac/60Hz supply grid, which means this product can operate in any part of the world.
The UPS and battery subsystems used are designed for extended industrial temperature range up to +74 (165 F) degrees Celsius with temperature dependent charging algorithms optimally charging the batteries involved.
For information of such UPS’ click on the following link:
Traffic Engineer's Blog 