Clary SP1250LX - Manual (Page 13)

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2 GENERAL CHARACTERISTICS
2.1 Characteristics
Overview
The Clary SP-LX Series Traffic UPS is a turnkey, true on-line, power conditioner and battery
backup or uninterruptible power system (UPS) designed for the extreme environments found in
traffic cabinets (-40 to + 74 deg C).
The Clary SP-LX Series, with its standard 41Ahr battery pack, is capable of operating, a full LED
intersection for over 2 hours at 700W (watts) output. A typical intersection consuming 450W can
be powered for approximately 4 hours. In Red-Flash operation, which consumes only about
300W, over 6 hours of backup is possible. These times assume fully charged batteries at the
ambient temperature of 25C .
Operation
The Traffic UPS is capable of producing a full regenerated and regulated, true sine wave power,
with continuous AC outputs. The Bypass Box is the link between the utility power, the UPS
power, and the loads.
The Bypass Box enables removal and replacement of the Traffic UPS without shutting down the
traffic control system (i.e. “hot swap” capability).
For 170 type cabinets, upon loss of power the Traffic UPS can actuate the existing Flash Transfer
Relays (FTRs), Mercury Contactor (MC) or Railroad Preemption to allow the traffic control system
to put the cabinet into Flash Mode operation.
Existing Flasher Modules and Flash Transfer Relays are utilized. The Traffic UPS does not
duplicate or take over flash operation or flash transfer relay functions.
The Traffic UPS provides continuous, fully regenerated, conditioned, regulated, sinusoidal (AC)
power to selected devices such as signal controllers, counters, modems, communications hubs,
NTCIP adapters, video equipment, etc.
To facilitate emergency crews and police activities, the Traffic UPS is compatible with police panel
functions (i.e. “Signals OFF” switch must kill power to the field wiring even when on UPS/Battery
power).
Utility Voltage Windows and Battery Operation
The UPS operates on utility power if the utility voltage is between 75 and 155 VAC. When the
utility falls below 75 VAC or climbs above 155 VAC the UPS operates from the batteries.