SECTION 16680

UNIT POWER CONDITIONERS

PART 1 GENERAL

SECTION INCLUDES

Unit power conditioners.

REFERENCES

ANSI/NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum).

ANSI/NEMA ST20 - Dry Type Transformers for General Applications.

NEMA AB1 - Molded Case Circuit Breakers.

NEMA PB1 - Panelboards.

SUBMITTALS

Submit shop drawings under provisions of Section [01300.] [01340.]

Submit shop drawings indicating cable lengths and construction, circuit arrangements and directory, control system wiring diagram, connection diagram for external wiring, and details of conduit and wiring connections and terminations.

Submit product data under provisions of Section [01300.] [01340.]

Submit product data for unit and accessories. Include catalog data.

[Submit manufacturer's installation instructions under provisions of Section [01300] [01340].]

OPERATION AND MAINTENANCE DATA

Submit manufacturer's operation data under provisions of Section [01700.] [01730.]

Include operating instructions for start-up and resetting unit.

Submit maintenance data under provisions of Section [01700.] [01730.]

Include maintenance instructions for cleaning methods, recommended cleaning materials, addition and modification of branch circuit arrangements, repair and parts replacement.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

DELIVERY, STORAGE AND HANDLING

Deliver products to site under provisions of Section [01600.] [01610.]

Store and protect products under provisions of Section [01600.] [01620.]

Accept products on site and verify damage.

Protect products from moisture and dust by storing them in a clean, dry location remote from areas involved in construction operations. Provide additional protection in accordance with manufacturer's instructions.

MAINTENANCE SERVICE

Furnish service and maintenance of power conditioning systems for [one] [_____] year from Date of Substantial Completion.

EXTRA MATERIALS

Provide [one] [_____] cable and connector of each size and type under provisions of Section [01700.] [01750.]

Provide [one] [_____] control circuit fuse under provisions of Section [01700.] [01750.]

PART 2 PRODUCTS

MANUFACTURERS

[_________________________________] Model [____________.]

[_________________________________] Model [____________.]

[_________________________________] Model [____________.]

Substitutions: Under provisions of Section [01600.] [01630.]

UNIT POWER CONDITIONER

System Continuous Rating: [As indicated on Drawings.] [[_____] KVA, [_____] KW.]

Input Voltage Rating: [120/208] [277/480] [__________] volts, [1] [3] phase.

Output Voltage Rating: [120/208] [277/480] [__________] volts, [1] [3] phase.

Impedance: [3] [___] percent, maximum.

Input Voltage Limits: [+10, -20] [_____] percent.

Frequency: [60 plus or minus 3] [_____] Hz.

Load Power Factor: Capable of operating between [60] [___] percent lagging and [60] [___] percent leading power factor.

Harmonic Distortion of Input Current Wave Form: [5] [___] percent maximum at full load.

Output Voltage regulation: [+6, -8] [___] percent.

Output Harmonic Distortion: Maximum [2] [___] percent rms total harmonic distortion.

Three-phase Overload Ratings:

[500] [___] percent for 1 cycle.

[100 percent for 10 seconds.]

[[___] percent for [___] minutes.]

Response Time: [100] [___] percent correction in [1] [___] cycles.

Audible Noise: Less than [52] [___] dBA at distance of 3 feet (1 M) in nonreverberating environment.

Efficiency: [90] [___] percent minimum over operating range.

Normal Mode Attenuation: [32] [57] [___] dB, 10 Hz. to 1 MHz.

Common Mode Attenuation: [126] [130] [140] dB.

Environmental Conditions: Operate satisfactorily when	environment is maintained between 32 degrees fahrenheit (0 degrees Celsius) and 104 degrees Fahrenheit (40 degrees Celsius), and less than 95 percent humidity (non-

condensing).

DRY TYPE ISOLATION TRANSFORMER

Isolation Transformer: ANSI/NEMA ST 20; factory-assembled, air cooled dry type shielded isolation transformer, ratings to match unit ratings specified.

Insulation System: Class 220C, with 150 degree C average winding temperature rise.

Winding Taps: ANSI/NEMA ST 20.

Sound Levels: ANSI/NEMA ST 20.

Basic Impulse Level: 10 kV.

Ground core and coil assembly to enclosure using a visible flexible copper grounding strap.

Provide electrostatic winding shield with separate insulated grounding connection.

Coil Conductors: Continuous windings with terminations brazed or welded.

Isolate core and coil from enclosure using vibration-absorbing mounts.

CIRCUIT BREAKERS

Branch Circuit Panelboard: NEMA PB1; circuit breaker type.

Provide panelboards with bus ratings to match unit capacity specified. Provide copper ground bus.

Molded Case Circuit Breakers: NEMA AB1; plug-in type thermal magnetic trip circuit breakers, with common trip handle for all poles.

CONTROLS AND INDICATORS

Controls: AC input circuit breaker; INDICATOR TEST switch; [____________________] and [____________________.]

Indicators: Provide audible and visual alarm indication of abnormal conditions.

Output Overvoltage: Higher than 6 percent above rated.

Output Undervoltage: Less than 13 percent below rated.

Transformer Overtemperature: Temperature higher than 180 degrees Celsius.

[_______________________________________________.]

Meters: [Use [1] [___] percent accuracy meters.] [Use electronic sensing with digital display.]

Voltage: Input and output, phase-phase and phase-neutral.

Current: Input and output, each phase; output neutral current; ground current.

Apparent Power: Output kVA.

ACCESSORIES

Power Supply Junction Box: Watertight box, with terminal blocks for connection of incoming power feeder circuit, and connector for input cable.

Input Cable: [12] [___] feet ([4] [___] M) length, cable made up of building wire in liquid-tight flexible metal conduit.

Control Circuit Junction Box: Watertight box, with terminal blocks for connection of control and interlock circuits, and connector for cable to unit.

Control Cable: [12] [___] feet ([4] [___] M) length, cable made up of building wire in liquid-tight flexible metal conduit.

Output Cables: Fabricate output cables using copper building wire and liquid-tight flexible metal conduit, [[___] feet ([___] M) in length.] [length as indicated on Drawings.]

Remote Emergency Power Off Switches: Switch assembly with normally open contact mounted in painted wall box. Provide [___] feet ([___] M) of three conductor cable for connection to unit.

Transient Suppression Plate: Copper, 3 feet (1 M) square.

FABRICATION

Electroplate brackets and securing hardware with corrosion resistant material. Secure bolts, studs and nuts with lockwashers.

Identify internal wiring at each end of conductor.

Provide cabinet grounding lug.

Enclosure: ANSI/NEMA 250, Type 1 enclosure allowing access from front for servicing adjustments and connections, with access through hinged door equipped with tumbler lock and latch handle. Equip cabinet for fork truck lifting.

Equip air inlet with [permanent filters and pressurize cabinet] [or] [use gaskets around door and panel openings] to prevent entry of dirt.

Cooling: [Forced convection] [or] [natural convection.]

Component Ratings: To achieve expected service life of twenty years continuous duty, ten years without component replacement.

Cabinet finish: Primed and painted inside and outside with [[gray] [__________] semi-gloss enamel].] [manufacturer's standard finish.]

PART 3 EXECUTION

EXAMINATION

Verify that surfaces are ready to receive work.

Verify field measurements are as [shown on Drawings.]

[shown on shop drawings.] [instructed by manufacturer.]

Verify that required utilities are available, in proper location, and ready for use.

Beginning of installation means installer accepts conditions.

INSTALLATION

Install in accordance with manufacturer's instructions.

MANUFACTURER'S FIELD SERVICES

Prepare and start systems under provisions of Section [01600.] [01650.]

Include check out of system, energizing system, and verifying proper operation.

END OF SECTION