Attachment_A_Specifications.docx

Specification for Molina Uninterruptible Power Supply

ABCO UPS DSE007-20-12-12-60-S OR EQUAL

1.0 Introduction and General Requirements:

Provide continuous duty, solid state, on-line double conversion reverse transfer static uninterruptible power supply (UPS) that conforms to Underwriters Laboratories (UL) 1778. The UPS, by means of solid state conversion techniques, must provide continuous regulated alternating current (AC) power to its output terminals, while operating from an input power source. The UPS system shall consist of a battery charger, inverter, static bypass transfer switch, manual maintenance bypass switch, controls and monitoring, remote monitoring interfaces (form C contacts), and system protective/isolation devices on DC battery, AC input, and bypass connections. External battery direct current(DC) power supply to the UPS will be provided by the Government.

1.1 Environment

Supplied product shall be suitable for use in an industrial environment Ambient Temperature: 32-104 degrees Fahrenheit Relative Humidity: 0-95% Operating Altitude: 10,000ft Audible Noise: 65-72dBA @ 4.9ft Enclosure: Nema 1 / IP-20 Footprint Available: 36”Wx48”D

1.2 System Ratings

1.2.1 Termination Lugs for External Connections

All system terminations for connections to external systems shall be UL listed lugs sized for the conductor size ranges specified below:

AC Static Switch Input #4AWG-#1AWG AC Battery Charger Input #4AWG-#1AWG AC Output to Critical Load #4AWG-#1AWG AC Maintenance Bypass #4AWG-#1AWG DC Battery: #1/0AWG - #2/0AWG

1.2.2 AC Input to UPS/Inverter

Voltage: 208 volts line-to-line.

Number of phases: Three-phase, three wire Voltage Range: Plus 10 percent, minus 10 percent nominal, without affecting battery float voltage or output voltage.

Frequency: 60Hz, plus or minus 5 percent.

1.2.3 AC Maintenance Bypass

Voltage: 120 volts line-to-neutral.

Number of phases: single-phase, two wire Current: 62.5 amps Overload Capacity: 125% continuous, 150% for 10 minutes, 200% for 1 minute, 1000% for 1 cycle Transfer time: Zero (make-before-break)

1.2.4 Static Switch

Voltage: 120 volts line-to-neutral Switch Type: silicon controlled rectifier (SCR) Failure Mode: automatically fails to bypass Transfer Time: Zero (make-before-break) Syce Capture Range: 0.5% to 0.8% (adjustable) Slew Rate: 1Hz/sec to 10Hz/sec (adjustable) Overload Capacity: 125% continuous, 150% for 10 minutes, 200% for 1 minute, 1000% for 1 cycle

1.2.5 DC Output

Voltage: 125 volts DC nominal, adjustable to 140VDC Capacity: Capable of delivering 75 Amps continuously

3.2.6 AC Output

Power: 7.5 KVA Voltage: 120 volts line-to-neutral.

Number of phases: single-phase, two wire Frequency: 60Hz plus or minus 0.1% Voltage regulation: Within plus or minus 2.0 percent of nominal voltage.

Frequency regulation: Plus or minus 0.1 percent Harmonic distortion (RMS voltage): maximum of 5% RMS total Load power factor operating range (without derating): 0.8-1.0 Overload capacity:

120% continuous 125 percent load for 10 minutes.

150 percent load for 60 seconds.

Crest factor (full load): 3:1 Transient Response: 23% for 1/2 cycle; 2% after 50 milliseconds Recovery Time: < 50 milliseconds to plus or minus 1%

1.3 System Components

1.3.1 UPS Module

1.3.1.1 General Description

UPS module consists of a rectifier/charger unit and an inverter unit with their associated synchronizing equipment, protective devices, surge suppression, and accessories as required for operation.

1.3.1.2 Rectifier/Charger Unit

Provide a solid state rectifier/charger unit that converts alternating current to direct current, and provides regulated direct current to the dc bus, supplying power to the inverter and charging the battery plant.

1.3.1.2.1 Input Protective Device

Provide the rectifier/charger unit with an input protective device. Size the protective device to accept simultaneously the full-rated load and the battery recharge current. Provide a protective device that has an amperes symmetrical interrupting rating of 14kAIC and is padlockable.

After the battery is recharged, the rectifier/charger unit maintains the battery at full float charge until the next operation under input power failure. Battery charger is capable of providing equalizing charge to the battery.

1.3.1.2.2 DC Ripple (Output Filter)

Rectifier/charger unit is to minimize ripple current and voltage supplied to the battery; the ripple voltage output is not to exceed 100mV.

1.3.1.2.3 Battery Protective Device

Provide the module or external battery system with a dc protective device to isolate the module from the battery system. The protective device size rating is as required by system capacity. Provide a protective device that has an amperes symmetrical interrupting rating of 10kAIC and is padlockable.

1.3.2 Inverter Unit

Provide a solid-state inverter with sinusoidal output deriving its power from the dc bus (rectifier or battery source) and providing ac power within specified limits to the critical load.

1.3.2.1 Output Overload

Provide an inverter that is able to sustain an overload as specified across its output terminals. The inverter is to remain on and continue to operate within rated parameters, with inverse-time overload shutdown protection. If the overload condition persists beyond the rated parameters of the inverter, the load is to be transferred to the bypass source where the inverter disconnects automatically from the critical load bus. If the bypass source is not available and the overload/fault condition continues, the inverter is to current limit for the time as determined by the manufacturer and then shut down to protect the internal components.

1.3.3 External Protection

Provide the UPS module with built-in self-protection against undervoltage, overvoltage, overcurrent and surges introduced on the ac input source and/or the bypass source. Provide the UPS with built-in self-protection against overvoltage and voltage surges introduced at the output terminals by load switching or circuit breaker operation in the critical load distribution system.

1.3.4 Internal Protection

Provide the UPS module with the ability to be self-protected against overcurrent, sudden changes in output load and short circuits at the output terminals. Provide the UPS module with output reverse power detection which causes the module to be disconnected from the critical load bus when output reverse power is present. Provide the UPS module with built-in protection against permanent damage to itself and the connected load for predictable types of failure within itself and the connected load. At the end of battery discharge limit, the module shuts down without damage to internal components.

1.3.5 Battery Protection

Provide the inverter with monitoring and controls circuits to protect the battery system from damage due to excessive discharge. Inverter shutdown is be initiated when the battery has reached the end of discharge voltage. Automatic shutdown based on discharge time is not acceptable.

1.4 Static Bypass Transfer Circuit

Provide the control logic with an automatic transfer circuit that senses the status of the inverter logic signals and alarm conditions and provides an uninterrupted transfer of the load to the static bypass ac power source, without exceeding the transient limits specified herein, during times when maintenance is required, when a malfunction occurs in the UPS or when an external overload condition occurs. The static bypass transfer circuit is to be used to connect the input bypass ac power source to the critical load when required. Provide the static bypass transfer circuit with the following features:

1.4.1 Construction

Provide a static bypass transfer circuit as an integral part of the UPS that consists of a static switch, made up of two reverse-paralleled SCRs (silicon-controlled rectifiers) per phase conductor.

1.4.2 Automatic Uninterrupted Transfer

The static bypass transfer switch automatically causes the bypass ac power source to assume the critical load without interruption when the bypass control logic senses one of the following conditions and the UPS inverter output is synchronized to the bypass ac power source:

a. Inverter overload exceeds unit's rating.

b. Battery protection period is expired and bypass is available.

c. System failure.

d. Inverter output undervoltage or overvoltage.

1.4.3 Interrupted Transfer

If an overload occurs and the UPS inverter output is not synchronized to the bypass ac power source, the UPS inverter output current-limits. The inverter then turns off and an interrupted transfer to the bypass ac power source is made. If the bypass ac power source is outside of tolerance, an interrupted transfer is made upon detection of a fault condition.

1.4.4 Manual Load Transfer

It must be possible to make a manually-initiated static transfer from the system status and control panel by turning the UPS inverter off or by initiating it through the UPS display interface. The transfer is to make-before-break.

1.4.5 Automatic Uninterrupted Forward Transfer

Automatic transfer of the load back to the inverter is to take place when the transfer was caused by an overload and only after the load has returned to a level within the inverter capacity.

1.4.6 Forced Transfer

Provide control logic circuitry with the means of making a forced or reverse transfer of the static bypass transfer circuit on an interrupted basis.

1.5 Maintenance Bypass Circult

1.5.1 General

Provide a maintenance bypass switch or arrangement of switch devices.

1.5.2 Load Transfer

The maintenance bypass switch provides the capability of transferring the critical load from the UPS static bypass transfer switch to maintenance bypass and then back to the UPS static bypass transfer switch with no interruption to the critical load.

1.5.3 Maintenance Bypass Protective Device

Provide the maintenance bypass with a protective device. Size the protective device to pass the full-rated output load. Provide a protective device that has an amperes symmetrical interrupting rating of 14kAIC and is padlockable.

1.6 Display, Controls, and Alarms

Provide the UPS module with a microprocessor-controlled display unit on the front of the system. Controls, meters, alarms and indicators for operation of the UPS module are to be on this panel. Provide a menu driven graphical user interface for browsing the screens.

1.6.1 Module Meters

1.6.1.1 Monitored Functions

Monitor and display the following functions:

a. Input voltage, phase-to-phase (all three phases).

b. Input current, all three phases.

d. Bypass voltage, phase-to-neutral.

e. Bypass frequency.

f. Battery voltage.

g. Battery current (charge/discharge).

h. Output voltage, phase-to-neutral.

i. Output current, phase-to-neutral.

j. Output frequency.

l. Maintenance bypass voltage, phase-to-neutral.

1.6.2 Module Controls

Provide a module or equivalent features via touchscreen with the following controls:

a. Silence audible alarm

b. Float

c. Equalize

b. Adjust setpoints on various alarms

c. Alarm test/reset pushbutton.

f. Emergency off pushbutton, with guard. Provide a hard-wired pushbutton even if touchscreen system is provided.

g. AC output voltage adjustment.

h. Transfer load to and from static bypass circuit.

i. Emergency off pushbutton, with guard. Provide a hard-wired pushbutton even if touchscreen system is provided.

1.6.3 Status or System Alarm Indicators

Provide lamp indicators on the front of the UPS for the following statuses and alarms, with color of lamp as indicated below (exact wording of alarm on manufacturer model may vary as long as alarm meets the intent designated below):

a. Bypass to Load (red lamp)

b. Inverter to Load (red lamp)

c. Float (yellow lamp)

d. Equalize (red lamp)

e. Low AC Input (red lamp)

f. Low DC Voltage (red lamp)

g. Battery Circuit Breaker Open (red lamp)

h. Bypass Source Circuit Breaker Open (red lamp)

i. AC Input Circuit Breaker Open (red lamp)

j. AC Output Circuit Breaker Open (red lamp)

k. UPS Trouble (red lamp)

l. Out of Sync (red lamp)

m. Bypass Source Low Voltage(red lamp)

n. Inverter Available (green lamp)

1.6.4 Mimic Diagram

Provide mimic diagram, in the format of a single-line diagram, that graphically depicts whether the load is supplied from the inverter, bypass, or battery.

1.7 Data Acquisition

Provide Form C dry contacts for remote indication, capable of indicating the alarms listed below:

a. UPS Trouble

b. Bypass Supplying Load

c. Charger Failure

d. Inverter Failure

e. Low DC Disconnect

f. Bypass Source Low Voltage

g. AC Output Low Voltage

h. Overtemperature Summary

i. AC Power Failure

j. Out of Sync

k. Battery Discharging

l. Bypass Off Frequency

m. Fan Failure

n. Low DC Voltage

o. Battery Breaker Open

1.8 Temperature Control

1.8.1 General

Ensure cabinet and enclosure ventilation is adequate to operate the components within their ratings. Forced-air cooled rectifier, inverter, and control unit will be acceptable. If UPS input power is lost, then the cooling fans are to continue to operate. Provide redundancy that ensures failure of one fan or associated circuit breaker does not cause an overheat condition. Provide visual and audible alarms on the control panel that indicate blower power failure. Provide replaceable filters on air inlets, which may be located on the inside of the cabinet doors and are easily accessible for replacement.

1.9 Temperature Sensors and Temperature Compensation

1.9.1 Overtemperature

Provide temperature sensors to monitor the air temperature. Provide a sensor or sensors to monitor the temperature of rectifier and inverter heat sinks. Provide critical equipment over-temperature indication that starts a timer that shuts down the UPS system if the temperature does not return below the setpoint level recommended by the UPS manufacturer.

1.9.2 Provide temperature sensor and compensation for automatic adjustment of battery charging voltage based on ambient temperature.

2.0 Installation

Installation will be performed by the Government.

3.0 Commissioning

Contractor shall provide one (1) 8-hour day of on-site Start-Up and Commissioning Services conducted during normal working hours (Mon-Fri, 0800-1700, Non-Holiday) by a Factory Certified Field Service Engineer; inclusive of labor, travel and living expenses.

4.0 Government Furnished Equipment

2.1 Batteries

Batteries to be connected to and charged by the UPS will be supplied by the Government.

5.0 Delivery

Product shall be delivered to:

Bureau of Reclamation 1800 South Rio Grande Avenue Montrose, CO 81401-4800