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2 System Overview
2.1 Description
The UPS Solution has been designed to provide seamless battery support to a Siemens
type traffic controller in the event of a loss of mains supply. The solution offers a line-
interactive uninterruptable power supply unit to constantly monitor the status of the mains
supply, maintaining a battery bank when power is present and switching to battery back
up when it is not. The switch from mains power to battery back up, and back again, is
almost instantaneous, ensuring that the traffic intersection controller sees no significant
break in power and remains operational.
The UPS Solution can be scaled to suit a range of power and battery hold up time
requirements. Hold up times can be extended further still with the connection of an
external generator as described in section 2.4.
2.2 Cabinet Variants
The UPS solution has been designed to be housed within a standard Siemens traffic
controller cabinet outer case to reduce its visual impact. When installed, the controller
and UPS solution cabinets appear identical. Two cabinet variants are available, as
described below.
UPS Cabinet -
Battery Expansion Cabinet -
WARNING: No more than one Battery Expansion Cabinet can be connected to
any one UPS Cabinet.
2.3 Supported Loads
The UPS solution is ideally suited to support ELV LED traffic controllers, but can also
support LV installations. It caters for intersection loads up to 2000W in two optimised
steps via a choice of UPS unit:
UPS Unit
Alpha FXM1100
Alpha FXM2000
WARNING: Both UPS units are subject to de-rating at high temperature. This
must be considered when specifying each solution. See sections 4.1 and 12.5.1
for details. See section 5.2 for a solution sizing example.
WARNING: Any traffic controller, Siemens type or third party, which is powered
via the UPS solution must be fitted with a 300mA RCD. See section 7.2 for
more details.
Version
7
Last Editor
Ore Oluwatudimu
Document
UPS Solution General Handbook
Name
Copyright ã Siemens plc 2017 All Rights Reserved
Houses the UPS system equipment and up to two
48V 55Ah battery banks.
Houses up to three 48V 55Ah battery banks only.
The Battery Expansion cabinet can be installed
alongside the UPS cabinet, providing additional
battery support in cases when an extended period of
support time is required.
Max Power Output
1100W / VA
2000W / VA
Table 2-1: UPS Load Suitability
Page 10 of 76
TS008468
Infrastructure and Mobility, Traffic Solutions
Suitable for
Loads up to and including 1000W
Loads from 1000W to 2000W
ISSUED
Status
Date
31/01/2017
Doc. No.
667/HB/47750/000
Sopers Lane, Poole, Dorset
BH17 7ER
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