Uninterruptible Power Supply (UPS)

General Details

Uninterruptible Power Supply (UPS)

Power failures at critical intersections can result in traffic chaos and increased accident risk as the control exercised by the traffic signals is no longer operational.

It is therefore crucial to have a proven Power Backup System (UPS) to provide continuous AC power for all traffic light system ensuring that full traffic control is maintained during mains power failures.

Scalable Solutions

The capacity of the backup power supply has a large influence on the overall UPS cost. The load capacity and support times required are scalable to suit individual site requirements. For small to medium sized intersections the UPS can be accommodated in a single ST950 style cabinet. For large sites a second cabinet may be used to hold additional batteries. Each cabinet is suitably vented and to ensure maximum capacity.

Automatic Switching From Mains To Backup Power

When mains power is present the UPS system maintains the charge in the batteries at an optimum level, helping to maximise battery life.

In the event of a power failure the system switches transparently to the backup batteries without interrupting the power to the traffic controller, ensuring there is no disruption to normal traffic control. On restoration of the site power the system automatically (and transparently) switches back to mains power and begins to re-charge the batteries.

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