Evaluation of Three Recent Models of UPS for Intersection Traffic Signals with LEDs

Chitturi, Madhav V.; Benekohal, Rahim F.

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https://hdl.handle.net/2142/46018 Copy

Description

Title

Evaluation of Three Recent Models of UPS for Intersection Traffic Signals with LEDs

Author(s)

• Chitturi, Madhav V.
• Benekohal, Rahim F.

Issue Date

2005-07

Keyword(s)

Uninterruptible Power Supply for Intersections, UPS, Intersection Traffic Signals, LED Signal Modules, Battery Back up System for Traffic Lights, BBS.

Abstract

Uninterruptible Power Supply (UPS) systems are used to power the intersection traffic signals that have Light Emitting Diode (LED) signal modules, in case of a power failure. The objective of this study was to test the PB2000ITS UPS manufactured by US Traffic Corp., ME1000 UPS from TechPower Developments Inc and DUI 24M11 from Dimensions Unlimited Inc, and verify if they meet the Illinois DOT’s specification for UPS systems for traffic signals with LED modules. These were the most updated models furnished by the manufacturers at the time. Multiple tests with full load (approximately 700 W) were conducted at room temperature to determine charge and discharge times. For PB2000ITS the average run time was 3:31 and average recharge time was 16:25 at room temperature. For ME1000, the average discharge and recharge times were 2:32 and 42:16 respectively at room temperature. For DUI 24M11 the average discharge and recharge times were 3:57 and 18:58 respectively at room temperature. All the UPS systems meet the majority of the IDOT Specification requirements, but had some minor shortcomings.

Series/Report Name or Number

FHWA-IL/UI-TOL-16

ISSN

0917-9191

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/46018

Sponsor(s)/Grant Number(s)

The Illinois Department of Transportation

Copyright and License Information

No restrictions. This document is available to the public through the National Technical Information Service, Springfield, Virginia 22161

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