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READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 16: ELECTRICAL]{.underline}

SECTION 16205 - UNINTERRUPTIBLE POWER SUPPLY SYSTEMS

USE: Furnishing and installing of Uninterruptible Power Supply Systems
(UPS) to protect essential electrical equipment from outages due to
temporary loss of electrical power.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:** .

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 2/97

**SECTION 16205**

**UNINTERRUPTIBLE POWER SUPPLY SYSTEMS**

**[PART 1: GENERAL]{.underline}**

**1.1 SUMMARY**

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**SELECT EITHER A FERRORESONANT (FOR SMALL, SINGLE PHASE LOADS) OR A
STATIC SOLID STATE (FOR MOST LARGER (10 KVA UP) SINGLE OR THREE PHASE
APPLICATIONS) UNLESS A ROTARY UPS IS SPECIFICALLY NEEDED OR PREFERRED.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

** A. Section Includes: \[Furnishing\] \[and\] \[installing\]
\[ferroresonant\] \[static solid state\] \[rotary\] Uninterruptible
Power Supply Systems (UPS) for \[computer facilities\] \[data link
facilities\] \[communication facilities\] \[security systems\]
\[\_\_\_\_\_\_\_\_\_\_\_\_\].**

**1.2 SUBMITTALS**

** A. General: Submittals shall be according to \[Section 01009 -
General Information and Requirements.\] \[Section 01300 - Submittals.\]
\[Section 01365 - Certificates of Conformance.\]**

** B. Manufacturer\'s Shop Drawings and Literature: Submit \[\_\_\_\_\]
copies of the manufacturer\'s descriptive data for the UPS system and
accessories to be used on this project. Include data on all subsystems
such as rectifiers/chargers, inverters, transfer switches, maintenance
switches, batteries, instruments, and controls. Provide scale drawings
of the UPS equipment and show connections to normal and standby
electrical sources.**

**1.3 QUALITY ASSURANCE**

** A. Labeling Requirements: The UPS systems and components shall be
Underwriters Laboratories, Inc. (UL) listed and labeled. UL listing and
labeling will not be required if it can be shown that the UPS system
meets the requirements of another nationally recognized testing
laboratory (NRTL).**

** B. Testing Requirements: The UPS systems and components shall be
completely factory tested and calibrated as a system prior to
shipment.**

**1.4 WARRANTY**

** A. Special Warranty for Batteries: A written warranty, signed by the
manufacturer and principle installer, agreeing to replace UPS system
storage batteries that fail in materials and workmanship within the
specified warranty period.**

**  1. Special warranty period for batteries shall be 10 years from date
of substantial completion. A full warranty applies to the first year of
the period, and a prorated warranty applies to the last 9 years.**

**[PART 2: PRODUCTS]{.underline}**

**2.1 MATERIALS**

** A. General: UPS systems shall be constructed of the manufacturer\'s
standard materials, as listed in published product information; types
and sizes shall be as indicated or as required for the installation.**

**2.2 EQUIPMENT**

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**SELECT APPROPRIATE WORDS. SELECT DESIRED TIME BATTERY WILL BE REQUIRED
TO MAINTAIN POWER TO CRITICAL LOAD. THIS IS GENERALLY 15 MIN WHEN A
STANDBY GENERATOR IS AVAILABLE OR WHEN CRITICAL LOAD CAN BE SHUT DOWN IN
ORDERLY FASHION AS IN SOME COMPUTER INSTALLATIONS.**

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** A. General: UPS system shall maintain its continuous rated electrical
power output during a failure of its normal power input for a minimum of
\[10 minutes\] \[15 minutes\] \[1 hour\] \[4 hours\] \[\_\_\_\_\_\_\_\].
Upon return of normal power, UPS shall automatically recharge the
batteries to full charge within ten times the duration of the outage,
and then revert to float charge. When the normal power outage exceeds
the time the battery can maintain output power, the UPS shall
automatically disconnect the discharged battery and connect the load
directly to normal input power circuit. Operating conditions shall be
\[0 to 40 degrees C\] \[minus 10 to 50 degrees C}, 0 to 95 percent
relative humidity, and 0 to 4,000 feet above sea level.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**DELETE THIS PARAGRAPH UNLESS A FERRORESONANT UPS IS DESIRED.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

** B. Ferroresonant UPS: System shall consist of the following major
components: ferroresonant transformer, battery, battery charger, and
inverter. In normal operation, line power is fed directly through the
ferroresonant transformer to the load while the battery charger is
energized on demand to charge the battery and the inverter is off.
During a power outage the inverter is turned on and supplies power to
the ferroresonant transformer without any interruption in continuous
load current. The UPS in sizes 2 kVa and larger shall be microprocessor
controlled, with a LCD display and touchpad keyboard, with an RS232 port
for linking to a computer terminal, and with a data terminal for linking
to a modem. The UPS in sizes 2 kVA and up shall be capable of meter
functions including readout of input and output volts, amps and
volt-amps plus battery volts and amps, and run time logs on the major
components. Alarm messages plus relay contact signal on out of limits
operation shall be provided for battery, battery charger, ac output,
overload and over temperature conditions. Controls, and adjustable set
points shall be provided for the UPS and its major components and
functions. The UPS shall be equal to Best Power Technology Inc.
Micro-Ferrups in sizes up to 1500 volt amps and to Ferrups in sizes from
1500 va to 15 kVa. Full load efficiency shall not be less than 72
percent for units up to 500 VA, 85 percent for units up to 1500VA and 89
percent for units from 2 to 15 kVA. Audible line noise in decibels shall
not exceed 47dB for units to 1500 VA, 52dB for units 2 to 5 KVA, and
57dB for units 7.5 to 15 kVA. All UPS units shall provide complete
isolation from the supply line; less than 2 pf effective capacitance;
isolated output neutral; voltage spike attenuation of 250:1; common mode
noise rejection of 120dB; transverse mode noise rejection of 60dB;
voltage regulation [+]{.underline} 3 percent; output kVA rating with
power factor from .85 lead to .85 lag; overload capability of 25 percent
for ten minutes with surge capacity of 50 percent; sinewave output with
3 percent maximum single harmonic; 5 percent total harmonic distortion;
and output frequency 60 Hz [+]{.underline} .5 Hz. Batteries shall be
included with the UPS in the smaller sizes up to 5 kVA and shall range
in capacity from 50 minute backup at full load for the 250 VA unit to 15
minute backup at full load for the 5 kVA unit. Batteries for the units
over 5 kVA shall be furnished to give the required backup time and
desired lifetime specified elsewhere.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**DELETE THIS PARAGRAPH UNLESS A STATIC SOLID STATE UPS IS DESIRED.**

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** C. Static Solid State UPS: System shall consist of the following
major components: rectifier/charger; inverter; ac automatic transfer
switches; and maintenance switches. Construct system with ancillary
instruments, indicators and controls as required for UPS systems to
operate as a complete and independent installation. Mount ancillary
components on front of enclosures. System to function as follows: During
failure of normal power, maintain full load output using power from
battery for time specified in 2.02A above. Upon return of normal power
to rectifier/charger, automatically recharge batteries and revert to
floating condition. When normal power does not return by the time the
battery becomes discharged, automatically disconnect battery from
inverter and switch load directly to normal input power circuit, thus
bypassing UPS equipment. Provide free-standing rigid enclosures, capable
of resisting external vibrations and electromagnetic fields, for all
system equipment. Enclosures shall have screened ventilation openings
and hinged doors for front entry access to components. Synchronizing
controls shall automatically synchronize and phase-lock the UPS to the
ac incoming bypass line at a frequency of 60 Hz [+]{.underline} .5
percent. Synchronizing controls shall include adjustable frequency
synchronization limits in steps of [+]{.underline} .5 percent to
[+]{.underline} 1.5 percent of nominal. Indicator lamps shall be
provided to indicate when UPS output is matched with the bypass line and
that UPS is synchronized and phase-locked. The UPS shall be a reverse
transfer system with the critical load receiving its power through the
UPS inverter at all times except during a UPS failure or when clearing a
fault. Maintenance switches shall be provided where necessary to isolate
portions of the UPS equipment for maintenance without shutting down the
entire system.**

**  1. Rectifier/Charger: The rectifier/charger shall consist of primary
input circuit breakers, isolation transformers, solid-state rectifiers,
dc filters, battery circuit breakers, and necessary control circuitry.
Rectifier/charger shall be capable of simultaneously supplying dc power
to charge the battery and to run the inverter at full load, and shall
include current limit circuitry to prevent a fully discharged battery
from overloading the charger. Voltage regulators are required to
regulate the charger output voltage to the recommended value for
maintaining charge of the battery. Rectifier/charger shall meet the
following input performance requirements: input voltage \[480 Vac, 3
phase, 3 wire\] \[\_\_\_\_\_\]; input voltage range + 10 percent, -15
percent from nominal; frequency range 60 Hz [+]{.underline} 5 percent;
maximum harmonic current feedback is not over 30 percent of input
current at full load; operating current inrush from 25 percent maximum
to 100 percent of full load rating in 15 seconds; current limiting is
125 percent maximum of that required to operate the inverter at full
load; power factor of .85 minimum at full load; efficiency of 95 percent
minimum at full load; protection from short circuit shall be a circuit
breaker. Rectifier/charger shall meet the following output requirements:
voltage as required by battery and inverter; voltage for charge and
float functions shall be adjustable [+]{.underline} 8 percent from
nominal; output voltage regulation [+]{.underline} 1 percent maximum for
input voltage and dc load variations; ripple [+]{.underline} 2 percent
RMS for 0 to 100 percent resistive load; overload current capability of
125 percent of nominal full load current for 8 hours; overload
protection shall be electronic current limiting.**

** 2. Inverter: Solid-state single-phase static inverters shall be
comprised of inverters, filters and regulators for supplying regulated
alternating-current outputs. Input dc and output ac circuit breakers
shall protect inverters against overloads and short-circuit conditions.
Controls shall include circuitry capable of starting and stopping
inverters electronically. Instrumentation shall include ac ammeters,
voltmeters, and frequency meters accurate to within 2 percent. Inverter
shall meet the following performance requirements: output voltage
\[120/208 volts\] \[\_\_\_\_\_\], 60 Hz, 3-phase, 4 wire, adjustable
[+]{.underline} 5 percent from nominal; output regulation
[+]{.underline} 1 percent for a balanced load or [+]{.underline} 2-1/2
percent for a 30 percent unbalanced load; output waveform 5 percent
maximum total harmonic distortion line to line; frequency stability
normally synchronized to commercial ac line over frequency range of
[+]{.underline} 1.5 percent (selectable) or [+]{.underline} 0.5 percent
when free running; output response under sudden application or removal
of full load [+]{.underline} 10 percent maximum deviation with load
recovering to [+]{.underline} 1 percent of steady state in less than 100
milliseconds; overload rating of 125 percent for 15 minutes, 150 percent
for 30 seconds; short circuit electronic current limited to 150 percent
for 30 seconds; harmonic content for linear loads 3 percent maximum
single harmonic and 5 percent maximum total harmonics; efficiency at
full load 90 percent minimum. The inverter shall be the hybrid type
which combines the features of the step-wave and the pulse-width
modulated inverters.**

** 3. Static Automatic Transfer Switch: Switch shall be capable of
automatically transferring UPS full load current between the inverter
output and the bypass line and back again as its automatic transfer
circuits respond to alarm conditions. Transfer switch shall be
solid-state and shall be capable of uninterrupted power transfer. Switch
shall meet the following transfer characteristics: transfer time 100
microseconds (overlapping); detection time (synchronous) 4.2
milliseconds maximum (quarter cycle); detection time (asynchronous) 8.3
milliseconds maximum (half cycle); retransfer mode to be
automatic/inhibit (selectable); retransfer delay 2 to 32 seconds in auto
mode (selectable); transfer point [+]{.underline} 10 percent of nominal
(adjustable); retransfer point [+]{.underline} 5 percent of nominal
(adjustable); retransfer point [+]{.underline} 5 percent of nominal
(adjustable); transfer inhibit point [+]{.underline} 20 percent of
nominal (adjustable).**

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**DELETE THIS PARAGRAPH UNLESS A ROTARY UPS IS DESIRED.**

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** D. Rotary UPS: System shall consist of the following major
components: rectifier/charger; storage battery; battery circuit breaker;
static inverter; motor-generator set; system bypass switch; inverter
bypass switch, control and indicator panel; and remote annunciator.
During normal operation, utility power shall be converted to dc by the
controlled rectifier. This dc power is supplied to the battery and the
inverter. The inverter powers the synchronous motor which turns the
generator to supply clean sine wave ac to the load. During a normal
power outage the battery takes over for the rectifier without any
interruption to load power or in frequency which is controlled by an
internal oscillator while normal power is off. The inverter and system
bypass switches operate automatically in event of component failure, or
manually for equipment deenergization during maintenance. The
inverter/bypass switch connects input power around the rectifier,
battery, and inverter to the motor generator set. The system bypass
switch connects input power around the entire system to the load. In
either case, normal power is momentarily paralled with motor generator
output in a make-before-break switching sequence. Then, the procedure is
reversed in bringing the system back on line. The system shall maintain
steady state output voltage to within [+]{.underline} 1 percent of
rated, transient voltage regulation not over [+]{.underline} 8 percent
during bypass/transfer or at 50 percent step load. Overload capability
shall be 110 percent of rated for 2 hr., 125 percent for 10 minutes, and
150 percent for 1 minute. Rated speed shall be 1800 RPM. No regular
maintenance shall be required at less than 1 year intervals. Metal
enclosures suitable for use in a computer room shall be provided for all
equipment. The rotary UPS system shall be designed for operation in
temperatures from 10 to 40 degrees C, relative humidity from 10 to 90
percent. Fault detectors and indicators shall include automatic shutdown
for output over or undervoltage; output underfrequency; bearing
overtemperature. Protective circuits shall switch the motor generator
off and transfer the load to bypass when out-of-limit conditions
occur.**

**  1. Motor Generator Set: The motor shall be synchronous type, with
two bearings, brushless exciter, max. temp rise of 80 degrees C reduced
current pony motor type starter, input circuit breaker, and motor
controls. The generator shall be synchronous type, brushless, two
bearings, 80 degrees C temperature rise, with output circuit breaker,
direct connected ac exciter, and generator controls. Generator shall be
capable of at least 3 times rated current during short circuit
condition. Motor and generator shall be mounted on a common steel base
with spring type vibration isolaters. Coupling shall be gear type,
flexible and adjustable. Controls shall include start and stop switches,
voltage adjustment of [+]{.underline} 5 percent and instruments for
indicating ac input and output volts and amps.**

** 2. Rectifier/Charger: The rectifier/charger shall consist of a
voltage regulated, current-limited, 3 phase SCR bridge rectifier. It
shall provide power to the dc link and it shall have sufficient capacity
to provide enough power to the inverter to allow the system to carry
full load with a reserve capacity of 25 percent for simultaneous battery
recharging. Time to recharge a completely discharged battery shall not
exceed ten times the discharge time.**

** 3. Inverter: The inverter shall be all solid state, capable of
accepting the dc output of the battery and delivering ac power within
specified limits to the MG set. The inverter shall include all controls
and logic necessary to maintain proper frequency and to automatically
start up and accept the MG set load. The inverter shall be rated for 100
percent continuous duty at 40 degrees C ambient, and its semiconductors
shall be protected by fast-acting current-limiting fuses.**

** 4. System Status and Control: The system status and control panel
shall include all instruments and controls required for proper system
operation. An audible alarm shall sound for any function with a
potential problem. A system status panel shall have visual alarm
readouts indicating the fault and prompting the needed corrective
action. System alarms shall include utility fault; system fault;
generator circuit breaker closed; inverter on; utility on; inverter
bypass closed; system bypass closed; system and utility out of phase and
in phase. System metering shall include dc bus voltage; charger amps; ac
input volts; ac input amps; ac output volts; ac output amps; inverter
output volts; inverter output amps. A power outage counter shall keep
count of the utility outages. A silence switch shall be included for the
alarm system and an emergency stop switch to activate the system
shutdown sequence.**

** E. Battery: Those UPS systems which furnish a battery with the system
shall be as provided by the manufacturer when the battery has capacity
to meet the required outage time. Otherwise, batteries shall be
lead-acid, electrochemical type, two volts per cell nominal, with lead
calcium plates and glass or transparent plastic case. Estimated life of
the battery shall be 20 years with expected annual water replenishment.
Large batteries shall include acid-resistant, two tier rack. All
required intercell connections, bus or cables, necessary maintenance
equipment, and approximately 5 percent spare cells shall be included
with the battery. New lead-acid batteries shall deliver a minimum of 90
percent of its rated capacity when tested in accordance with NEMA IB 4.
The useful life of lead-acid batteries shall be completed when the rated
capacity falls below 80 percent when tested in accordance with NEMA IB
4.**

** F. Maintenance Bypass/Isolation Switch: Provide maintenance
bypass/isolation switch that is interlocked so the UPS cannot be
operated unless the static bypass transfer switch is in the bypass mode.
The device shall have 3 settings that produce the following conditions
without interrupting supply to the load during switching:**

**  1. Full Isolation: Load is supplied bypassing UPS. UPS ac supply
input, static bypass transfer switch, and UPS load terminals are
completely disconnected from external circuits.**

** 2. Maintenance Bypass: Load is supplied bypassing UPS. UPS ac supply
terminals are energized to permit operational checking, but system load
terminals are isolated from the load.**

** 3. Normal: UPS ac supply terminals are energized and the load is
being supplied through either the static bypass transfer switch or the
UPS rectifier and inverter.**

** G. Indicators and Controls: Provide the following indicators and
controls. Display shall be liquid crystal or digital LED. Provide
sensors, transducers, terminals, relays, and wiring required to support
listed items. An audible signal shall sound for alarms as well as the
visual indication.**

**  1. Quantitative indicators:**

** a. Input voltage, each phase, line to line**

** b. Input current, each phase, line to line**

** c. Bypass input voltage, each phase, line to line**

** d. Bypass input frequency**

** e. System output voltage, each phase, line to line**

** f. System output current, each phase**

** g. System output frequency**

** h. DC bus voltage**

** i. Battery current and direction (charge/discharge)**

** j. Elapsed time - discharging battery**

** 2. Status indicators:**

** a. Normal operation**

** b. Load on bypass**

** c. Load on battery**

** d. Inverter off**

** e. Alarm condition exists**

** 3. Alarm indicators:**

** a. Bypass ac input overvoltage or undervoltage**

** b. Bypass ac input overfrequency or underfrequency**

** c. Bypass ac input and inverter out of synchronization**

** d. Bypass ac input wrong phase rotation**

** e. Bypass ac input single-phase condition**

** f. Bypass ac input filter fuse blown**

** g. Internal frequency standard in use**

** h. Battery system alarm**

** i. Control power failure**

** j. Fan failure**

** k. UPS overload**

** l. Battery-charging control faulty**

** m. Input overvoltage or undervoltage**

** n. Input transformer overtemperature**

** o. Input circuit breaker tripped**

** p. Input wrong-phase rotation**

** q. Input single-phase condition**

** r. Approaching end of battery operation**

** s. Battery undervoltage shutdown**

** t. Maximum battery voltage**

** u. Inverter fuse blown**

** v. Inverter transformer overtemperature**

** w. Inverter overtemperature**

** x. Static bypass transfer switch overtemperature**

** y. Inverter power supply fault**

** z. Inverter transistors out of saturation**

** aa. Identification of faulty inverter section/leg**

** bb. Inverter output overvoltage or undervoltage**

** cc. UPS overload shutdown**

** dd. Inverter current sensor fault**

** ee. Inverter output contactor open**

** ff. Inverter current limit**

** 4. Controls:**

** a. Inverter on-off**

** b. UPS start**

** c. Battery test**

** d. Alarm silence/reset**

** e. Output-voltage adjustment**

**[PART 3: EXECUTION]{.underline}**

**3.1 INSTALLATION**

** A. General: Install UPS system equipment and components as indicated,
complying with the manufacturer\'s written instructions, applicable
requirements of codes and standards, and according to recognized
industry practices.**

** B. Coordination: Coordinate with other electrical work, including
raceways, boxes and fittings, to interface installation of UPS systems
work with other work.**

** C. Grounding: Provide equipment grounding connections, sufficiently
tight to assure a permanent and effective ground, for UPS system
equipment as indicated.**

**3.2 FIELD QUALITY CONTROL**

** A. Testing: Upon completion of installation of UPS system equipment,
and after building circuitry has been energized with normal power
source, the UPS system shall be energized and tested to demonstrate
capability and compliance with requirements. Factory representatives
shall conduct startup and testing procedures in the presence of the
Contracting Officer who shall be given 48 hours notice before any
startup or test procedure is to be performed. Malfunctioning units shall
be replaced.**

**[PART 4: MEASUREMENT AND PAYMENT]{.underline}**

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**WHEN A \"LUMP SUM\" CONTRACT IS USED, DELETE THE TITLE PART 4:
MEASUREMENT AND PAYMENT, AND BOTH ARTICLES FROM THIS SECTION.
MEASUREMENT AND PAYMENT WILL BE ADDRESSED IN PART 4 OF SECTION 01010
-SUMMARY OF WORK.**

**\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\***

**4.1 METHOD OF MEASUREMENT**

** A. Units: The work described in this section will not be measured for
payment.**

**4.2 BASIS OF PAYMENT**

** A. Payment: No direct payment for the work described under this
section will be made. Consideration for this item shall be included in
the bid price for other items of the Contract.**

**END OF SECTION**