SECTION 16435

CONVERTERS

PART 1 GENERAL

SECTION INCLUDES

Converters.

RELATED SECTIONS

Section 03300 - Cast-in-Place Concrete.

Section 16180 - Equipment Wiring Systems.

REFERENCES

NEMA 250 - Enclosures for Electrical Equipment (1000 volts maximum).

NEMA AB 1 - Molded Case Circuit Breakers.

NEMA MG 1 - Motors and Generators.

NFPA 70 - National Electrical Code.

SUBMITTALS

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

Shop Drawings: Include outline dimensions, mounting points, and interconnecting wiring diagrams.

Product Data: Provide ratings and weights.

Manufacturer's Installation Instructions: Indicate recommended methods for installing and connecting units.

OPERATION AND MAINTENANCE DATA

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

Document ratings of system and of each major component.

Include instructions for starting and operating converters.

Identify operating limits which may result in hazardous or unsafe conditions, or in equipment damage.

Include routine preventative maintenance and lubrication schedule.

List special tools, maintenance materials, and replacement parts.

Include repair instructions for procedures to check, repair, and test equipment during typical malfunctions.

MAINTENANCE SERVICE

Furnish service and maintenance of converter and related equipment for [one] [_____] year from Date of Substantial Completion.

EXTRA MATERIALS

Furnish under provisions of Section [01700.] [01750.]

Provide [two] [_____] of each size and type fuse.

PART 2 PRODUCTS

MANUFACTURERS

[______________________________] Model [_____________.]

[______________________________] Model [_____________.]

[______________________________] Model [_____________.]

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

CONVERTERS

Description: Rotary converter for [converting [AC to DC] [single phase to three phase] power.] [change AC power frequency.]

Service Conditions:

Temperature: [_____] degrees F ([_____] degrees C), [maximum.] [minimum.]

Altitude: [________] feet ([________] m) above sea level.

Exposure to [damp] [__________] conditions.

Configuration: Motor-driven generator set.

Ratings:

Power Rating: [___] kW[.] [at [80] [___] percent power factor.]

Input Voltage: [240] [480] [_____] volts, [60] [_____] Hz, [single phase.] [three phase.]

Output Voltage: [120] [480] [_____] volts, [DC.] [[60] [400] [_____] Hz, [single phase.] [three phase.]]

Output Voltage Regulation: Plus or minus [one] [___] percent steady state, with [18] [___] percent no load to full load transient regulation.

Output Frequency Regulation: Plus or minus [one] [___] Hz.

Overload Capability: [10] [___] percent for [two] [___] hours.

Duty Cycle: [Continuous.] [_______________.]

Temperature Rise: [80] [___] degrees C.

Electrical Connection Requirements:

Branch Circuit Wire Size: Require size no larger than [[_____] amperes, maximum ampacity.] [provided under Section 16180.]

Branch Circuit Overcurrent Protection: Rate unit for use with [[fuses] [or] [circuit breakers] sized [___] amperes, maximum.] [overcurrent protection size and type provided under Section 16180.]

Terminal Lugs: Match size and type to branch circuit conductors[.] [provided under Section 16180.]

Enclose lugs with terminal box sized to [NFPA 70] [[__________] Code], suitable for connecting [raceway] [busway] as [indicated.] [provided under Section 16180.]

COMPONENTS

Motor: NEMA MG 1; [brushless synchronous] [low-slip squirrel-cage induction] type, rated [600] [___] rpm.

AC Generator: NEMA MG1; [brushless synchronous type, [12] [___] wire reconnectable machine.] [____________________.]

****** [OR] ******

DC Generator: NEMA MG 1; [[shunt] [compound] wound DC generator.] [______________________________.]

Size motor and generator to meet requirements of unit power rating.

Match motor and generator torque requirements. Couple generator directly to motor[.] [through flexible shaft.]

Motor and Generator Insulation: NEMA MG 1; Class F.

Voltage Regulator: Provide voltage regulator to maintain specified output voltage limits.

ACCESSORIES

Provide RFI filter.

Provide [unit-mounted] [wall-mounted] control panel with the following controls and indicators.

Manual Voltage Control: Adjustable, plus or minus [___] percent of nominal, wired to voltage regulator.

Output Voltmeter: [3-1/2] [_____] inch ([90] [_____] mm) square, with [2] [___] percent accuracy. Include [4] [7]

position selector switch.

Output Ammeter: [3-1/2] [_____] inch ([90] [_____] mm) square, with [2] [___] percent accuracy. Include [4] [7] position selector switch.

Output Frequency Meter: [3-1/2] [_____] inch ([90] [_____] mm) square, [reed type] [pointer type] with range of [58] [___] to [62] [___] Hz.

Running Time Meter: [3-1/2] [_____] inch ([90] [_____] mm) square.

Underfrequency Protection: [Automatic] [Manual] reset, set to trip at [___] percent underfrequency.

Overvoltage Protection: Automatic reset, set to trip at [___] percent overvoltage.

Field Circuit Breaker: NEMA AB 1; magnetic only circuit breaker in field circuit.

****** [OR] ******

Output Circuit Breaker: NEMA AB 1; thermal-magnetic circuit breaker connected to generator output.

Instrument Transformers: Provide potential and current transformers as required to operate meters. Match accuracy and burden to meters specified.

FABRICATION

Motor and Generator Enclosures: NEMA MG 1; [open drip proof.] [______________________________.]

Place entire unit in sheet metal enclosure, constructed to NEMA 250, Type [1] [___] requirements.

Finish unit using [_______________], [__________] color.

SOURCE QUALITY CONTROL

Provide testing of converter under provisions of Section [01400.] [01410.]

Test converter to NEMA MG 1, to verify performance to specification requirements.

Include witnessing of tests by [Architect/Engineer.] [Owner.]

PART 3 EXECUTION

PREPARATION

Provide concrete base for unit under provisions of Section 03300, size as shown on Drawings.

Obtain building environmental conditions in accordance with manufacturer's instructions.

INSTALLATION

Install converter in accordance with manufacturer's instructions.

FIELD QUALITY CONTROL

Perform field inspection and testing under provisions of Section [01400.] [01410.]

Inspect and test completed work to NEMA MG 1 prior to startup[,][.] [with manufacturer's field service personnel.

Test Procedures: [______________________________.]

Acceptable Test Values: [_______________________.]

Include description of testing and results in test report.

STARTUP OF EQUIPMENT

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

Prepare and start converter[.] [with manufacturer's field service personnel.]

ADJUSTING

Adjust work under provisions of Section [01650.] [01660.]

Adjust output voltage to within [one] [___] percent of nominal.

Adjust output frequency to within [one] [___] percent of nominal.

DEMONSTRATION

Provide systems demonstration under provisions of Section [01670.] [_____.]

Provide detailed operating and maintenance instruction [using manufacturer's field service personnel][,][.] [at project.] [at local classroom.] [at manufacturer's training facility.]

END OF SECTION