SECTION 633 - UNINTERRUPTABLE POWER SUPPLY
633.01 Description. This section describes the minimum requirements for battery backup
systems including uninterruptable power supply and power conditioner.
633.01.1 Uninterruptable Power Supply (UPS). If required by the contract documents
or design plans, the cabinet assembly shall be provided with a UPS System. The UPS system shall be a turn-key, true on-line, solid state, microprocessor controller power conditioner and/or UPS system. The system shall continuously regenerate and condition the AC sine wave, where 100% of the power to the load, whether on utility or batteries, is generated by the on-board inverter. The UPS system shall be capable of operating, up to the rated power levels, in extreme environments (-40°F to +165°F) with existing cabinet equipment, including any and all signal heads whether Incandescent, LED or Neon.
633.02 Materials. The UPS system shall consist of three (3) major components: the
Electronics Module, the Manual By-pass Switch, and the Battery System.
633.02.1 Electronics Module. The Electronics Module shall be provided as follows:
True Sinewave, Micro Processor controlled high frequency inverter. A temperature compensated battery charger. Local and remote control of UPS functions. Local and remote communicates capabilities. Utility By-pass Switch for by-passing the UPS for repair or removal.
633.02.2 The Manual Bypass Switch. A Manual By-pass Switch shall be provided as
follows: The UPS shall incorporate an automatic, internal safety by-pass capability and a Manual By-pass Switch. An optional interface connector shall be available that allows an external generator or vehicle inverter to supply utility power when commercial utility has failed. The UPS shall supply 120 VAC, 60 Hz, True Sinewave power when connected to either a generator or digital inverter power system
633.02.3 The Battery System. The battery shall be comprised of extreme temperature,
deep cycle, AGM-VRLA (Absorbed Glass Mat – Valve Regulated Lead Acid).
633.02.4 UPS Operation.
633.02.4 1--UPS System. A UPS System shall be provided as follows:
1.The Unit shall be capable of on-site programming without the use of attached computers.
2.On-line technology shall be supported and 100% of the load shall flow through the inverter 100% of the time to isolate and protect the attached equipment.
3.Power connection shall be made to the front or back of the UPS chassis to support NEMA cabinetry.
4.The UPS system shall be capable of providing continuous, fully conditioned and regulated sinusoidal (AC) power to select ed devices such as signal controllers, modems, communication hubs, NTCIP adapters and video equipment.
5.The UPS system shall be sized with a maximum rating to be capable of supporting all cabinet systems, regardless of power factor rating, without overdriving the poorer power factor LED heads whic h may cause early degradation, low luminosity or early signal failure and meeting minimum run time requirements during power loss/failure of commercial power.
6.Upon loss of utility power, the UPS system shall switch to battery power. In cases of UPS system failure, while on utility, the UPS system will auto-by-pass and remain in that mode until repaired. Should the battery power deplete such that it is not sufficient to power the equipment, the unit will auto-shutdown and return to normal operating mode once the utility power is restored.
7.The By-pass Switch shall enable remova l and replacement of the UPS system without shutting down the traffic control system (i.e. “hot swap” capability). The UPS system shall support generator input without going to batteries.
8.The UPS system shall be capable of starting when no utility AC is available, i.e. starting while on batteries (“cold starting”),
9.Existing cabinet Flasher Modules and Flash Transfer Relays shall be utilized.
10.To facilitate emergency crews and polic e activities, the UPS system shall be compatible with the police panel functions.
11.The UPS system shall not duplicate or assume Flash Operation or Flash Transfer Relay functions.
12.The UPS system shall deliver 120 VAC output when the AC input is between 75 to 175 VAC without going to batteries.
13.NEMA Style Cabinet mounting method shall be shelf mounted.
633.02.4 2--System Batteries. The system batteries shall meet the following:
a.The battery system shall consist of ex treme temperature, deep cycle, Gel or AGM-VRLA (Valve Regulated Lead Acid) batteries that have been field tested.
b.The battery system may consist of one (1) or more strings (typically four (4), six
6.or eight (8) batteries per string) of extreme temperature, deep cycle, Gel or AGM VRLA (Valve Regulated Lead Acid) batteries.
c.Batteries shall be capable of operating at extreme temperatures from -40°F to +165°F.
d.The batteries shall be provided with appropriate interconnect wiring and corrosion-resistant mounting trays and/or brackets.
e.The interconnect cables shall be prot ected with abrasion-resistant nylon sheathing.
f.The interconnect cables shall connect to the base module via a quick-release connector.
g.Battery construction shall include heavy duty, inter-cell connections for low- impedance between cells, and heavy duty plates to withstand shock and vibration.
h.The top cover shall use tongue and groove construction and shall be epoxied to the battery case for maximum strength and durability.
633.02.4 3--Electrical Specifications.
633.02.4 3.1--Input Specification. The following are input electrical specifications.
Nominal Input Voltage 120 VAC, Single Phase Input Voltage Range 75 VAC to 155 VAC (without drawing energy from batteries) Input Frequency 50 or 60 Hz Input Configuration 3-Wire (Hot, Neutral & Ground) Maximum Input Current 30 amps
633.02.4 3.2--Output Specification. The following are output electrical specifications.
Nominal Output Voltage 120 VAC, Single Phase Power Rating 1.25 - 2.0 KVa continuous watts Output Frequency 50 or 60 Hz Output Configuration Keyed, connectors and duplex receptacle Output Wave Form True Sine wave Fault Clearing Current limit and automatic shutdown Short Circuit Protection Current limit and automatic shutdown Efficiency 85% at full load
633.02.4 4--UPS Electronics Module, Physical Specifications. The following are the
physical specification for the UPS. Height: 3.5” to 5.25” Depth: 8.75” to 10.5” Width: 15.5” to 19”
633.02.4 5--Environmental Specifications. The UPS system shall meet or exceed NEMA
temperature standards from -40°F to +165°F. The UPS system shall be field proven to meet or exceed NEMA temperature standards.
633.02.4 6--Battery Specifications.
The UPS system batteries shall be field te sted and proven to meet or exceed NEMA temperature standards of -40°F to +165°F. Hydrogen gas emissions shall meet Mil-Spec, MIL-B-8565J.
633.02.4 7--Communications, Controls and Diagnostics. The UPS system shall provide
standard Alarm Function Monitoring indicating loss of utility power, inverter failure, low battery condition and USB connectivity for system up/down loads. An RS232 or USB Interface shall be provided that allows full interactive remote computer monitoring and control of the UPS functions.
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Source: Standard Specifications for Road and Bridge Construction, 2017 Edition. Pages 553–555 of 1,113. View official source ↗