20 52 00 Motor Starters and Drives ADD 1.pdf

Construction Documents Set November 3, 2022

OREGON DEPARTMENT OF FORESTRY SECTION 20 52 00

TILLAMOOK FOREST CENTER MOTOR STARTERS AND DRIVES

BOILER REPLACEMENT PROJECT Page 1

PART 1 - GENERAL

1.01 RELATED SECTIONS

A. Section 20 10 00 - General Mechanical Provisions

B. Section 20 20 00 - Mechanical Operation and Maintenance Manuals

C. Section 20 51 00 - Motors

D. Section 23 09 00 - Controls

1.02 SHOP DRAWINGS, PRODUCT DATA, OPERATION & MAINTENANCE DATA

A. Submittals required for the products listed in the Product Table, in accordance with Section 20 10 00. Operation & Maintenance Information required as indicated in the Product Table in accordance with Section 20 20 00.

B. Operation & Maintenance Information requirements indicated by number designation as follows.

Refer to Section 20 20 00 for a description of each type of information.

1. Shop Drawings (submittal data)

2. Product Data (submittal data)

3. Manufacturer's Operation Manuals

4. Manufacturer’s Service and Lubrication Requirements

5. Service Contracts and Field Start-up Reports

6. Cleaning, Certification, and Test Reports

7. System Information

8. Warranties

PRODUCT TABLE

Operation & Maintenance Information

1 2 3 4 5 6 7 8 Variable Speed Drives X X X X X X X

Soft Starters X X X X X X X

PART 2 - PRODUCTS

2.01 DEFINITIONS

A. Variable Speed Drive (VSD): An electronic assembly that constitutes a type of motor drive used in electro-mechanical drive systems to control AC motor speed and torque by electronically varying motor input frequency. VSD converts incoming Alternating Current (AC) electric power at a frequency of 60 cycles per second (60 Hertz) to outgoing variable-frequency power through space vector pulse-width modulation (PWM) or sinusoidal PWM.

B. Variable Frequency Drive (VFD): Same as Variable Speed Drive. These two terms are used interchangeably in Drawings and Specifications.

2.02 VARIABLE SPEED DRIVES

A. Manufacturer: ABB, Allen Bradley, Yaskawa, Square D, Danfoss Graham, or approved.

B. Voltage Rating: 480 or 208 volts (as scheduled), three phase, three wire, 60 Hertz (Hz).

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C. VSD shall be furnished with door mounted operator controls consisting of Hand/Off/Auto switch, start/stop (reset switch, speed selection and 40 character LCD alphanumeric display. In automatic mode, VSD will follow an external signal and respond to remote start-stop contact wired to terminal strip. While in auto mode the VSD shall attempt up to ten restarts after a power dip, drive fault or external fault.

D. 40 character LCD alphanumeric display.

1. Frequency

2. Speed (RPM, %, or user programmable)

3. Motor current

4. Torque (calculated)

5. Motor power (calculated)

6. DC buss voltage

7. Output voltage

8. Heatsink temperature

9. Elapsed time meter

10. kWh meter

11. Fault Text

E. Controllers: Provide controllers for motorized equipment as indicated in schedules on Mechanical Drawings.

F. Two Stage Current Limit:

1. 175% at start-up

2. 50% to 150% motor load current

G. Power factor: 95% minimum.

H. Fault withstand capability: 18,000 symmetrical amperes.

I. Instantaneous overcurrent trip: Non-adjustable, 180% of controller continuous rated current.

J. Enclosure: Wall mounted NEMA 1 and MCC as scheduled. Refer to Electrical drawings.

K. The adjustable frequency controller shall convert three-phase 60 Hertz utility power to adjustable voltage and frequency, three-phase, A-C power for stepless motor control from 10% to 110% of base speed.

L. The VSD shall be a voltage source type with a Pulse Width Modulated (PWM) output utilizing power transistor semiconductors.

M. The VSD together with options and modifications shall mount within standard NEMA 1 enclosure suitable for continuous operation at a maximum ambient temperature of 40 degrees C. High voltage components within enclosure shall be isolated with steel covers. The complete unit shall be UL approved and labeled.

N. VSD shall be capable of starting into a rotating load without delay. Protective circuits shall cause instantaneous trip should any of the following faults occur:

1. 115% of VSD maximum current rating is exceeded.

2. Output phase to phase to phase to ground (ground fault) short circuit condition.

3. High input line voltage.

4. Loss of input phase.

5. External fault. This protective circuit shall permit, by means of the terminal strip, wiring of remote NC safety contacts such as high static, pressure, fire alarm duct detector, etc., to shut down the drive.

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O. Provide with by-pass switch/starters. Means shall be provided for isolating the VSD from line voltage conductors and by-pass mode conductors. Safety interlocks and limit controls shall remain in effect during by-pass mode. Refer to Section 23 09 00.

P. The following adjustments shall be available in the controller and retained in non-volatile memory:

1. Maximum frequency (15 to 400 Hz) factory set at 60 Hz.

2. Minimum frequency (3 to 60 Hz) factory set at 6 Hz.

3. Acceleration (.1 to 360 second) factory set at 20 sec.

4. Deceleration (.1 to 360 seconds) factory set at 20 sec.

5. Volts/Hertz ratio factory set for 460 V at 60 Hz.

6. Voltage offset or boost factory set at 100% torque.

7. Current limit (50% to 115% sine wave current rating) factory set at 11% current.

Q. The VSD shall have:

1. 0(4)-20 MA.

2. 0(2)-10 VDC.

3. RS-485 communications.

4. Frequency pulse isolated or non-isolated signals as speed reference (increase/decrease speed control.

5. P1 card for Ethernet communication with BAS controls specified in Section 23 09 00.

R. The VSD shall have a programmable electronic overload designed to protect the A-C motor, operated on VSD output, from extended overload operation.

S. The VSD shall provide true ground fault protection in all modes, starting and running, without any component failure, and a D-C bus contactor shall be used to provide this protection.

T. The VSD shall have three critical frequency avoidance bands to skip frequencies, which may cause mechanical damage.

U. The VSD shall have a digital display with the following display:

1. Instantaneous output current, voltage, and frequency.

2. First fault indication of over temperature, motor overload, high D-C bus voltage, high motor current line to line and line to ground, function loss, low D-C bus voltage.

V. The VSD shall have an internal input line reactor and/or isolation transformer to minimize nuisance trips, line noise, and electrical line problems. VSD operation shall result in less than l0% total harmonic distortion on the electrical distribution system.

W. The VSD shall be compatible with squirrel cage fan motors.

2.03 SOFT STARTERS

A. Manufacturer and model: ABB, WEG, Stellar, or approved. Similar to Stellar SR22 Compact Soft Starter.

B. Voltage Rating: 120 volts (as scheduled), single phase, 60 Hertz (Hz).

C. Solid state semiconductor motor starter shall be use thyristors for controlled reduced voltage motor starting and stopping, then switch to internal contacts for efficient running at rated speed.

D. Motor starter arranged for 35mm DIN rail mounting.

E. Enclosure: Wall mounted NEMA 1 or MCC as scheduled. Refer to Electrical drawings.

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PART 3 - EXECUTION

3.01 INSTALLATION

A. Install motor control equipment in accordance with manufacturer's instructions.

B. Select and install heater elements motor starters to match installed motor characteristics.

C. Motor Data: Provide neatly typed label inside each motor starter enclosure door identifying motor served, nameplate horsepower, full load amperes, code letter, service factor, and voltage/phase rating.

3.02 DRIVE START UP SERVICE

A. Start-up service including physical inspection of drive and connected wiring and final adjustments to meet specified performance requirements shall be provided by a factory trained service engineer employed by the manufacturer.

3.03 APPLICATION

A. Provide variable frequency drives for equipment as scheduled on Drawings and as required for the required sequence of operations as listed in Section 23 09 00.

END OF SECTION