General Construction Specifications
SECTION 15170
ELECTRIC MOTORS
PART 1 - GENERAL
1.01 SECTION INCLUDES
A. Single phase electric motors.
1.02 RELATED SECTIONS
A. Other sections of the specifications shall also apply to the extent required for proper performance of the work.
1.03 REFERENCES
A. NFPA 70 - National Electrical Code.
B. AFBMA 9 - Load Rating and Fatigue Life for Ball Bearings.
C. IEEE 85 - Airborne Sound Measurements on Rotating Electric Machinery.
D. IEEE 112 - Test Procedure for Polyphase Induction Motors.
E. NEMA MG 1 - Motors and Generators.
F. Underwriters Laboratories (UL): Applicable listings.
1.04 DESIGN REQUIREMENTS
A. Motor horsepowers shown on the electrical Drawings are approximate only. Design motors to perform the following:
1. Operate driven over the full range of load conditions without exceeding the full load nameplate rating.
2. Start and accelerate driven with voltage at the motor terminals at 80 percent of nameplate voltage.
3. Withstand any axial thrust from the driven equipment.
4. Operate continuously in 40 degrees C environment.
1.05 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Motor Data:
1. Manufacturer.
2. Nameplate rated horsepower.
3. Rated voltage.
4. Full load rpm.
5. Full load current.
6. NEMA design letter.
7. NEC code letter or inrush current.
8. Insulation class.
9. Service factor.
10. Full load efficiency (indicate test method).
11. Electrical connections.
12. Handling and placement instruction.
13. Mechanical connections.
14. Lubrication.
1.06 OPERATION AND MAINTENANCE DATA
A. Submit under provisions of Section 01730.
B. Operation Data: Instructions for safe operating procedures.
C. Maintenance Data: Assembly drawings, bearing data including replacement sizes, and lubrication instructions.
D. Field Test Data.
1.07 QUALIFICATIONS
A. Manufacturer: Company specializing in manufacture of electric motors and their accessories, with minimum three years documented product development, testing and manufacturing experience.
1.08 COORDINATION
A. Coordinate work under provisions of Section 01039.
B. Coordinate the work with installation of driven equipment.
1.09 DELIVERY,STORAGE AND HANDLING
A. Deliver to site, store, protect and handle motors under provisions of Section 01600.
B. Protect motors stored on site from weather and moisture.
1.10 EXTRA MATERIALS
A. Provide Series 300 stainless steel anchor bolts and nuts for equipment. Size bolts as recommended by the manufacturer of the equipment.
B. Install anchor bolts for mounting motors which requires careful alignment and have a fixed non-adjustable base or bolt hole drilling in Series 300 stainless steel sleeves with a diameter equal to twice the bolt diameter. Bolts for other similar non-critical alignment supports need not have sleeves.
PART 2 - PRODUCTS
2.01 MANUFACTURERS
A. Reliance Electric
B. Century/Gould
C. U.S. Motors
D. Substitutions: Under provisions of Section 01600.
2.02 SINGLE PHASE MOTORS
A. Starting Torque: Three times full load torque.
B. Starting Current: Less than five times full load current.
C. Pull-up Torque: Up to 350 percent of full load torque.
D. Breakdown Torque: Approximately 250 percent of full load torque.
E. Motors: Capacitor in series with starting winding; capacitor-start/capacitor-run motors shall have two capacitors in parallel with run capacitor remaining in circuit at operating speeds.
F. Drip-proof Enclosure: Class A (65 degrees C temperature rise) insulation, NEMA Service Factor, pre-lubricated ball bearings.
G. Enclosed Motors: Class A (65 degrees C temperature rise) insulation, 1.0 Service Factor, pre-lubricated ball bearings.
H. Design Voltage: Single phase, 60 Hz, 115/230 volts.
I. Single phase motor is identified in Contract Documents by type:
1. Type S-1 motors: Open drip proof enclosures.
2. Type S-2 motors: Totally enclosed.
2.03 ACCESSORIES
A. Nameplates: Motor shall be furnished with a stainless steel nameplate attached to the motor frame at an easily accessible location. The nameplate shall be clearly stamped with the following minimum data:
1. Manufacturer
2. Rated Horsepower
3. Power Factor
4. Rated Speed
5. Temperature Rating
6. Insulation Class
7. Rated Voltage
8. Rated Current
9. Bearing Sizes
PART 3 - EXECUTION
3.01 INSTALLATION
A. Install electric motors where shown on Drawings.
B. Follow manufacturer's written instructions and recognized industry practices.
C. Ensure that motors and electric connections comply with driven requirements.
3.02 FIELD QUALITY CONTROL
A. Test motors after the final placement.
1. Measurement of no-load currents of stator windings at rated voltage and frequency.
2. Measurement of phase currents while under load.
3. Mechanical checks.
4. Vibration checks.
END OF SECTION
