TechnicalSpecsSection15170.pdf

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SECTION 15170

ELECTRIC MOTORS

PART 1 - GENERAL

1.01 DESCRIPTION:

A. Furnish inverter rated electric squirrel-cage induction motors rated 460 volt and rated 10 horsepower to 25 horsepower. Motors to match existing motor horsepower and frame with a minimum efficiency of 92% (Attachment A).

1.02 RELATED SECTIONS:

A. Section 15806: Hot and Cold Water Pumps.

1.03 REFERENCES:

A. American Bearing Manufacturer’s Association (ABMA):

1. ANSI/ABMA 11:1990: Load Ratings and Fatigue Life for Roller Bearings.

B. American Society for Testing and Materials (ASTM):

1. ASTM B-117: Standard Practice for Operating Salt Spray (Fog) Apparatus.

C. Institute of Electrical and Electronic Engineers (IEEE):

1. IEEE Standard 85: Test Procedures for Airborne Sound Measurements on Rotating Electric

Machinery.

2. IEEE Standard 112: Standard Test Procedure for Polyphase Induction Motors and

Generators.

3. IEEE Standard 841: Standard for Petroleum and Chemical Industry—Premium-Efficiency, Severe-Duty, Totally Enclosed Fan-Cooled (TEFC) Squirrel Cage Induction Motors—Up to and Including 370 kW (500 hp).

D. National Electric Manufacturer’s Association, Inc. (NEMA):

1. NEMA-MG1: Motors and Generators

E. National Fire Protection Association (NFPA):

1. NFPA-70: National Electric Code.

F. Underwriters Laboratories, Inc. (UL):

1. UL-1004: Electric Motors; Standard for safety of rotating electric machines

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1.04 SUBMITTALS:

A. Submit the following with the bid:

1. Shop drawings and descriptive data to include:

a. Outlines, dimensions, weights, and wiring diagrams.

b. Nameplate date.

c. Efficiency and power factor at 1/2, 3/4 and full load.

d. Location of main conduit box.

2. Submit operation and maintenance manuals.

1.05 DELIVERY, STORAGE AND HANDLING:

A. Shipping:

1. Motors to be attached on a steel base to pumps specified in Section 15806 (attached).

Shipping instructions included in Section 15806

PART 2 - PRODUCTS

2.01 MANUFACTURERS:

A. General Electric Company

B. U.S. Electric Motor

C. Marathon Motors

D. Or equal

2.02 ELECTRIC MOTORS:

A. Ratings of Motors:

1. The following specific motor requirements are:

a. Motor enclosure: Totally Enclosed Fan Cooled (TEFC)

b. Severe duty motor.

c. Rated for continuous duty.

2. Provide motors capable of operating the driven equipment under all load and operating conditions without exceeding their respective rated nameplate current or power or their respective specified temperature limit at rated voltage.

3. Voltage ratings of motors:

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a. Motors shall be rated 460 volt (nameplate rating), three-phase, 60 Hertz; motors of 25 horsepower or less to be rated 460 volt, three-phase, 60 Hertz.

B. Type of motors:

1. Provide premium-efficiency, severe-duty, totally enclosed fan-cooled squirrel cage induction motors in accordance to IEEE 841.

2. Provide motors of NEMA Design B.

3. Variable Frequency Drive Motors

Pump Motor Quantity Variable Frequency Drive.

Hot Water Pump Motors 4 Yes

Cold Water Pump Motors 10 Yes

Primary Hot Water Heating Supply 3 No

4. Unless otherwise specified, motors are to be suitable for full-voltage starting.

C. Provide motors with Class F insulation with temperature rise by resistance at full load rating of a

Class B in accordance with NEMA Standards for Motors and Generators MG1, and based on a maximum ambient temperature of 40 degrees C.

D. General Characteristics of Motors:

1. Provide motors that comply with the latest NEMA Standards Publication No. MG1 for

Motors and Generators, unless otherwise specified.

2. Motor’s to be inverter rated.

3. Provide 10 horsepower and greater, polyphase with energy efficient operation unless otherwise specified in the specific driven equipment specification. Meet the Requirements of MG1-12.65.

4. Motor windings to be braced to withstand the stresses resulting from the method of starting. Windings to be thoroughly treated with insulating compound for protection against moisture and acid or alkaline conditions.

5. Bearings to be of the self-lubricating type, designed to ensure proper alignment of rotor and shaft and to prevent leakage of lubricant.

a. Bearings for open motors to be of the sealed ball type.

b. Bearings for totally enclosed and explosion proof motors to be of the ball type.

c. Bearing minimum L-10 fatigue life in hours at 100 percent load shall be 100,000.

d. Bearing grease shall be of the 120 degrees C thermal capability type.

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6. Provide horizontal motors with thrust bearings manufactured to function with the driven equipment, capable of handling all thrusts delivered to the motor by the driven equipment.

7. Provide horizontal motors of the open type with drip hoods of appropriate shape and construction. When the drip hood is too heavy to the removed by one person without the aid of lifting equipment, provide access for testing.

8. Provide totally enclosed fan cooled motors with a 1.15 service factor.

9. Provide motors of 10 to 25 horsepower of cast iron construction including frame for guard and end brackets. Provide totally enclosed motors with automatic breather and drain.

10. Provide stainless steel motor nameplates.

11. Motor terminal boxes and leads:

a. Provide terminal boxes for motors with oversized conduit to provide for making and housing the connections, and provide flexible leads to extend for a distance of not less than 4-inches beyond the face of the box. Provide cast-iron terminal boxed for totally enclosed motors capable of being rotated into four positions.

b. Provide auxiliary box with 1-inch threaded conduit opening and constructed such that conduit entrance may be place at top, bottom, or either side of box.

c. Provide leads for bearing and winding thermocouples and/or resistance temperature devices and vibration detection devices to auxiliary cast conduit boxes in locations which do not interfere with motor operation and maintenance. Boxes to be similar to above.

d. Provide a grounding terminal in the main terminal box, and an additional external grounding pad and silicon bronze bolts.

2.03 SHOP TESTING:

A. Submit copies of characteristic curves of each motor furnished as part of the driven equipment submittal.

B. Motor shop tests to be made in accordance with IEEE Test Codes as specified in the NEMA

MG1 Standards for Motors and Generators. Submit completed NEMA report-of-test forms in reporting test data.

C. Motor efficiency to be determined by use of IEEE Standard 112 Test Method B, and by use of

MG1-12.54.

D. Submit for induction motors 10 horsepower up to and including 25 horsepower, copies of routine test reports of electrically duplicate motors.

2.04 SHOP PAINTING:

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A. Motors are to be given a shop application of paint customary of the manufacturer’s standard coating for severe-duty pumps.

1. Provide minimum one coat of primer and minimum two coats of topcoat.

2. Coating shall be subject to the corrosion resistance test as specified in ASTM B-117 for 96 hours and shall meet the requirements of IEEE 841.

PART 3 - WARRANTY:

A. Furnish a Manufacturer’s warranty ensuring that the motors will be free from defects in design, materials and workmanship for a period of 12 months from delivery date.

END OF SECTION