26 29 23 - VFDs .pdf

26 29 33 – VARIABLE FREQUENCY DRIVES

Herbert, Rowland & Grubic, Inc. 26 29 23-1 005153.0436

SECTION 26 29 33 - VARIABLE FREQUENCY DRIVES

PART 1 - GENERAL

1.1 DESCRIPTION OF WORK

A. This section covers the requirements for variable frequency drives (VFDs) for process equipment. The provider of the VFDs shall also provide all harmonic reduction equipment, and other appurtenances required by this specification.

B. Provide the hereinafter specified equipment as part of the systems called for in the Specifications and on the Contract Drawings.

1.2 RELATED SECTIONS

A. Division 26.

B. Division 40.

1.3 REFERENCES

A. The latest revisions of the following standards and specifications are incorporated herein by reference and form a part of this Specification to the extent that sections or portions of section are applicable hereto:

1. National Electric Code (N.E.C.).

2. Underwriter's Laboratories, Inc. (U.L.) - U.L. 508.

3. National Electrical Manufacturers Association (NEMA).

a. NEMA - 1C-1.

b. NEMA ICS 3.1.

c. NEMA 250.

4. American National Standards Institute (ANSI).

5. Standards for Industrial Control (J.I.C.).

6. Institute for Electronic and Electrical Engineering (IEEE) - IEEE 519.

1.4 SYSTEM DESCRIPTION

A. Systems - Provide VFDs for the following systems:

1. Equalization Tank Submersible Pumps

2. Recirculation Pump Station Submersible Pumps

3. Secondary Clarifiers Submersible Pumps

Controls - Controls shall be in accordance with the applicable equipment specification and this section.

B. Harmonic Reduction Equipment:

1. For drives powering motors less than 20 HP (and as otherwise indicated on the drawings), provide either 3 or 5 percent input line reactors as recommended by the VFD manufacturer. For drives 20 HP and larger (and as otherwise indicated on the Drawings), provide harmonic filters or other harmonic mitigation equipment.

Herbert, Rowland & Grubic, Inc. 26 29 23-2 005153.0436

2. For all motors controlled by VFDs which will be installed at a location farther than 100 feet away from the VFD (and otherwise if an output line reactor is shown on the Electrical Drawings), provide output line reactors.

3. Submit design calculations with the VFD shop drawing submittal proving compliance with IEEE Std. 519 for drives 20 HP and larger.

C. Coordinate (with the Engineer and Owner) the location and installation of harmonic filters if required to be external to supplied VFDs. The electrical installer shall provide all interconnecting conduit, wiring, and protective devices between VFDs and these external devices.

1.5 SUBMITTALS

A. Submittals in accordance with Sections 01 33 00 - Submittals and 26 05 00 – Electrical- General.

B. Submit harmonic analysis (calculations).

C. Submit written description of sequence of operation for each system of VFDs.

D. Submit dimensional data for each VFD. Include as a minimum: height, width, depth, distance from bottom of enclosure to centerline of disconnect handle (top of handle maximum of 6 feet 6 inches from floor with VFD on concrete housekeeping pad), conduit openings, size and location of cooling vents. Include any additional enclosures for harmonic devices.

E. Submit drawings showing panel door layouts.

F. Submit elementary diagrams and block diagrams for the VFD system. Indicate how/where remote equipment is wired to the VFD system.

G. Submit manufacturer's literature containing information needed to prove conformance with these specifications.

1.6 QUALIFICATIONS

A. Equipment shall fit into the space as shown on the Contract Drawings.

1.7 DELIVERY, STORAGE, AND HANDLING

A. Deliver, store, protect, and handle equipment to site under provisions of Materials and Equipment. Examine "Drop-N-Tell" monitors. See Section 26 05 00, Electrical-General, for requirements.

B. Deliver in 40-inch maximum width shipping splits, individually wrapped for protection and mounted on shipping skids.

C. Store in a clean, dry, heated or air conditioned space. Maintain factory wrapping or provide a heavy canvas or heavy plastic to protect units from dirt, water, debris, and traffic. Replace any equipment damaged during shipping, handling, or storage.

Herbert, Rowland & Grubic, Inc. 26 29 23-3 005153.0436

1.8 SPARE PARTS

A. Furnish the following spare parts for each system of VFDs provided:

1. One complete set of spare fuses for each drive.

2. Provide three L.E.D. pilot light assemblies of color type provided.

1.9 WARRANTY

A. Provide a two-year on-site warranty by the VFD manufacturer to cover all VFDs and all associated equipment and devices. The warranty period shall begin at the time of substantial completion. The warranty shall cover all parts and labor necessary to repair equipment which is inoperable due to defects in material or workmanship.

1.10 SPECIAL SIGNAGE

A. At each remote disconnect switch for all systems operated via VFD, a sign shall be posted to read “Do Not Open With Equipment Operating - Will Cause Damage to VFD.” Sign shall have red letters on a white background.

PART 2 - PRODUCTS

2.1 MANUFACTURER

A. All VFDs provided shall be by the same manufacturer:

1. Yaskawa.

2. Square D - Altivar 61/71 Series.

3. Danfoss.

4. Or Equal.

B. All materials and equipment furnished shall be current products of manufacturers regularly engaged in the manufacturer of VFD and for which replacement parts are available.

2.2 PULSE-WIDTH MODULATED VARIABLE FREQUENCY DRIVE

A. General:

1. Furnish and install the complete VFD system(s) described in this specification and as shown on the Contract Drawings.

2. Drives shall be microprocessor controlled with digital display and programming/status key pad.

3. Provide VFDs rated for the full horsepower and full load amperes and rpm of the equipment as indicated.

4. VFDs shall have ample starting and operating torque to operate the specified equipment over its complete speed range. Oversized drives may be required for some applications.

5. Motor Service Factors - Minimum 1.0, unless otherwise specified in respective equipment sections.

6. Provide VFDs specifically designed to provide continuous speed adjustment of three phase, inverter duty, NEMA design 'B' squirrel cage motors.

Herbert, Rowland & Grubic, Inc. 26 29 23-4 005153.0436

7. The VFD applications shall be for the systems listed in Table 26 29 23-1 at the end of this section.

8. Complete configured VFD system shall be U.L. listed per U.L. 508.

9. Minimum Efficiency - 95 percent at motor full load.

10. Unit Service Factor - Minimum 1.0.

11. All VFDs shall be provided by the Contractor.

12. Input line reactors, either 3 percent or 5 percent, as recommended by the VFD manufacturer, shall be provided for all drives less than 20 HP (and as otherwise indicated on the drawings). All drives 20 HP and larger (and as otherwise indicated on the Drawings) shall have harmonic filters or other harmonic mitigation equipment.

13. For all motors controlled by VFDs which will be installed at a location farther than 100 feet away from the VFD (and otherwise if an output line reactor is shown on the Electrical Drawings), provide output line reactors.

14. All drives are operated via electrical systems connected to a standby emergency generator. As such, all drives shall be capable of full operation both starting and running with a maximum of a 15 percent voltage dip based on a 480-volt system.

B. Construction - House the VFDs in the motor control centers or other enclosures for OEM-supplied drive per Table 26 29 23-1. Provide replaceable, cleanable filters in enclosure cooling fan/vent openings.

C. VFD Operating Criteria:

1. The VFD shall be capable of converting 208 volt, 3 phase, 60 Hertz power to a fixed potential DC bus level. The DC voltage shall be inverted to an adjustable frequency pulse width modulated (PWM) sine coded output waveform. The drive shall utilize solid-state full wave diodes and IGBT power transistors.

2. The VFD shall be insensitive to the phase rotation of the AC line and not cause displacement power factor of less than 0.95 lagging under any speed or load condition.

3. The VFD shall have the following ratings:

a. Minimum efficiency of 95 percent at rated load.

b. Overload Rating:

1) Variable Torque - 110 percent rated current for 1 minute.

2) Constant Torque - 150 percent rated current for 1 minute.

c. Ambient operating temperature of 0 to 50 degrees C continuously without derating.

d. Operating humidity of 5 to 90 percent, non-condensing.

4. The following basic control features shall be provided standard on each VFD:

a. Unidirectional operation, programmable acceleration and deceleration, restart into spinning loads. Implementation of the programmable acceleration and deceleration ramping shall be achieved without the programming of devices external to the VFD. Provide acceleration and deceleration ramp programming as suggested by the driven equipment manufacturer or as requested by the Engineer during system startup.

b. Full time torque limit, adjustable. Reduces speed to shed load when overcurrent conditions exists.

c. Programmable torque performance from 4 to 60 Hertz. Coordinate with manufacturer of each motor controlled by a VFD. Program minimum VFD

Herbert, Rowland & Grubic, Inc. 26 29 23-5 005153.0436 speed per motor manufacturer's recommendations to avoid overheating the motor.

d. Harmonic Reduction - See paragraphs 1.04.C, 2.02.A.12, and 2.02.A.13.

e. Frequency stability of 0.5 percent for 24 hours with voltage regulation of

+2 percent of maximum rated output voltage.

f. Status indication for the following:

1) Power on.

2) Run.

3) Motor direction.

4) Overcurrent.

5) Overtemperature.

6) Phase loss.

7) Current limit.

8) Ground fault.

9) Overvoltage.

10) Fault.

g. Control power transformer (CPT) for 120 volt AC power for operator devices.

h. Motor slip dependent speed regulation.

i. Minimum one cycle logic power carryover during loss of power.

j. Programmable automatic restart upon the return of power following a power outage.

k. Automatic restart after fault, minimum three attempts and shutdown with manual reset.

l. Critical frequency rejection or lockout.

m. Programmable preset speeds, minimum of three.

n. Local (via keypad) speed adjustment and speed indication, configurable in either rpm, percent of full speed, or hertz.

o. Remote speed adjustment via panel-mounted potentiometer.

p. Fault log for minimum of last three faults.

q. Isolated process instrument follower input signal of 4-20 mA DC, grounded or ungrounded.

r. 4-20 mA DC output proportional to 0 to 100 percent speed.

s. Provide auxiliary run output contact(s) wired to an interposing relay(s) or provide applicable programmable contacts. The interposing relay(s) or programmable contacts shall be provided with a minimum of two normally open and two normally closed contacts, rated for 10 amps at 120 volts. These are used for internal controls. At least one auxiliary relay or four programmable contacts are to be provided; others as required.

t. All wiring connections to the VFD shall be made on labeled terminal strips in accordance with Section 26 05 53 – Electrical System Identification.

5. The following protective features shall be provided standard on each VFD:

a. AC input line current limiting fuses for short circuit fault protection of AC to DC converter sections.

b. Electronic overcurrent trip for instantaneous or timed overload protection

c. Undervoltage and phase loss protection.

d. Overfrequency protection.

Herbert, Rowland & Grubic, Inc. 26 29 23-6 005153.0436

e. Overtemperature protection.

f. Surge protection from AC line transients.

g. Electrical isolation between power and logic circuits.

h. Ground fault protection.

i. VFD enable terminals. Normally closed, field-mounted protective devices

(such as auxiliary contacts on disconnect switches, emergency stop pushbuttons, low suction pressure switch, high motor temperature switches; see Contract Drawings and system specifications) shall be wired in series across the enable terminals.

j. Minimum of two output CTs for load monitoring.

k. Provide a minimum of three sets of programmable output contacts for remote alarm indication. Wire programmable VFD output contacts to interposing relays. Provide the number of relays as required, minimum of two, with a minimum of two normally open/two normally closed contacts rated 10 amperes at 120 volts.

l. LCD or LED diagnostic display.

m. Password protection for VFD programming.

6. The following VFD operating parameters shall be capable of being independently adjusted on the VFD:

a. Minimum Speed - 4 to 40 Hertz.

b. Maximum Speed - 40 to 90 Hertz.

c. Acceleration Time - 2 to 300 seconds.

d. Deceleration Time - 2 to 300 seconds.

e. Low Frequency Boost - Up to 46 volts.

f. Volts per hertz.

g. Current limits up to 110 percent for 60 seconds for variable torque VFDs, up to 150 percent for 60 seconds for constant torque VFDs.

h. Programmable Constant Torque - Variable torque switching. Drives which require physical modifications to accomplish this are not acceptable.

7. The following, manufacturer-installed options shall be furnished with the VFDs as specified:

Surge suppression unit shall be self-contained, meets UL 1449 and UL 1283, have repeatable surge current capability for long life, meets ANSI/IEEE C62.41, Category A, B, and C3 compatible, ANSI/IEEE C62.11, C62.45 tested. Protection modes shall be L-N, L-L, L-G, and N-G (where applicable), with a response time of 0.5 nanoseconds. Provide L.E.D.

status lights plus isolated dry contacts for system integrity monitoring.

Unit shall be sized by the VFD manufacturer and be Liebert, AccuVar ACV Series, Best, or approved equal. Individual suppression is not required when the VFD is installed in an MCC that includes incoming line surge suppression.

D. VFD Sequence of Operation:

1. The Enable input must be made for the drive to operate in any mode. When the

Enable input is lost while the drive is running, the drive shall ramp to stop and turn off.

2. When the Manual input is made, the drive shall start, stop and ramp to speed as manually adjusted via a remote mounted potentiometer.

Herbert, Rowland & Grubic, Inc. 26 29 23-7 005153.0436

3. When the Auto input is made, the drive shall start, stop and ramp to speed as controlled via a remote mounted potentiometer.

4. When the External Fault input is made, the drive shall ramp to stop, tum off, and send a fault signal to the drive fail indicator light. The drive shall not run until the fault is reset.

2.3 SYSTEM-SPECIFIC CONTROLS AND ALARMS

A. Field-mounted and connected equipment (remote from the VFD enclosure) such as start/stop pushbuttons, solenoids, flow switches, auxiliary contacts on disconnect switches, etc. as described in the Section 46 specifications.

B. The VFDs shall accept a remote start/stop and speed control inputs as shown on the Contract Drawings and described in Section 46 specifications.

C. Provide run, failure, and speed outputs for connection to the remote equipment as shown on the Contract Drawings and described in Section 46 specifications.

2.4 DV/DT FILTER (IF REQUIRED BY MANUFACTURER)

A. Product Overview:

1. Construction of this filter shall not include any capacitive components.

2. Filter design shall include a damping resistor element to reduce ringing or resonating between filter inductance and cable capacitance. This damping shall be present and effective for both differential and common mode operations.

3. The PWM Output Filter shall be specifically designed to accomplish three major functions:

a. Reduce peak voltage waveform voltage at the motor windings.

b. Reduce the dV/dt or “rise time” at the motor terminals.

c. Attenuate the common mode current to reduce the stress from bearing currents and reduce those stray common mode signals that can corrupt the control circuits and analog signal references.

B. Design Specifications:

1. The filter shall have both common mode and differential mode inductances. This can be accomplished by separate common and differential mode inductors, or by an integrated single core construction. The filter shall contain wire-wound resistors.

2. Core shall be constructed of non-laminated powered iron material.

3. Resistors shall be designed to run up to 1/2 of the power wattage rating.

4. The filter shall be rated for a maximum fundamental system frequency of 90 Hz at nominal system voltages up to 600 V and up to 120 Hz with a de-rating factor of 0.85.

5. The filter shall operate at a maximum carrier frequency of 10 KHz for units up to 110 amps and 5 KHz for units above 110 amps.

6. The ambient temperature of operation shall be 50° C for enclosed units and 60° C for open panel mounted units.

7. Filter shall be capable of operating at 150% current for one minute, repeated every 10 minutes.

8. Insertion losses shall be no more than 1.7% at 60 Hz and 2.6% at 90 Hz 480 volts.

Herbert, Rowland & Grubic, Inc. 26 29 23-8 005153.0436

C. Operational Limit

1. The maximum distance from the drive to the input terminals of the dV/dt Sentry filter shall be 50 feet.

2. Application shall be effective for lead distances between the drive and the motor that range from 30 feet to 1,000 feet.

3. Sound Pressure shall be less than 65 dB at one meter.

D. Construction:

1. All filters shall be UL component-recognized and shall be built to comply with UL

508A.

2. Construction shall be of copper wire.

3. Inductors shall be sized appropriately for the total connected load. The design maximum temperature shall be 200° C class N insulation.

4. Brackets shall be painted structural steel.

5. Coils shall be wedged in place and the core shall be locked in place using steel banding.

6. Windings shall consist of copper wire or of copper foil.

7. Terminations shall be copper alloy taps or UL-recognized terminal blocks.

8. Sheet insulation shall be Dupont Nomex.

9. Completed inductors shall be vacuum dipped and baked with epoxy resin.

E. Protection:

1. Filters shall be installed in the VFD enclosure.

2.5 HARMONIC FILTER

A. The harmonic filter shall treat all characteristic low frequency harmonics generated by a three phase full wave converter load (5 th

, 7 th

, 11 th

, 13 th

, etc.).

B. The characteristic harmonics shall be suppressed without need for individual tuning or the requirement to phase shift against other harmonic sources.

C. The harmonic filter shall be an adaptive passive series connected low pass filter consisting of an inductor capacitor network. Active electronic components shall not be used.

D. The harmonic filter model supplied shall be capable of feeding a three phase input rectifier with or without line reactors, with or without a DC link choke, with or without a combination line reactor and DC link choke.

E. The harmonic filter model supplied shall be capable of feeding a rectifier composed of diodes, thyristors or any combination thereof.

F. The harmonic filter shall meet the harmonic performance specification with a three percent phase voltage unbalance as defined in ANSI C-84.1-1995.

G. The harmonic filter shall not resonate with the power distribution system nor attract harmonics from other sources.

Herbert, Rowland & Grubic, Inc. 26 29 23-9 005153.0436

H. The filter shall be suitable for use with either a single nonlinear load or multiple nonlinear loads.

I. The filter shall be listed per UL-508.

J. In the operating range from full load to 30% load the power factor shall be .98 lagging to .85 leading.

K. The harmonic filter in combination with the adjustable frequency drive shall meet all requirements specified in the 1992 edition of IEEE standard 519 for individual and total harmonic voltage and current distortion. The Point of Common Coupling (PCC) for all voltage and current harmonic calculations and measurements shall be the input terminals of the harmonic filter.

L. Total Demand Distortion (TDD) of the current at the input terminals of the harmonic filter shall not exceed the limits defined in Table 10-3 of IEEE-519.

M. Tota l Harmonic Voltage Distortion (THVD) shall meet the requirements of Table 10-2 of IEEE-519. The harmonic filter supplier shall not be responsible for pre-existing voltage distortion caused by other harmonic sources.

N. The harmonic filter shall suppress the characteristic harmonics to the levels specified in paragraph 13.0 provided that the line voltage unbalance is between 0% and 1%. If the line voltage unbalance is between 1% and 3% per ANSI C84.1-1995 the total harmonic input current distortion at any reduced load or speed condition shall not exceed the full load THID by more than 50% (i.e. if 5% THID required at full load, then not more than 7.5% THID at reduced load when voltage unbalance is more than or equal to 1% and less than or equal to 3%.)

O. The full load efficiency of the harmonic filter shall be greater than 97 percent.

P. When fed from a power distribution system operating at the nominal distribution voltage, the harmonic filter output voltage at no load shall not be more than 4.6 percent of the nominal RMS and peak distribution voltage.

Q. When fed from a power distribution system operating at the nominal distribution voltage, the harmonic filter output voltage at full load shall not be less than the nominal RMS utilization voltage.

R. A l l wiring shall be copper.

S. To assure that voltage source PWM inverters do not experience over voltage trips, the harmonic filter shall not cause the inverter bus voltage to increase by more than 5% when the filter is operating from the nominal distribution voltage.

T. To assure that the filter will not reduce the life of a voltage source inverter’s bus capacitor, the output current waveform of the harmonic filter and the input current waveform of the inverter shall be consistent with the input waveform of an inverter fed from a drive equipped with a 3% minimum impedance line reactor.

Herbert, Rowland & Grubic, Inc. 26 29 23-10 005153.0436

U. To assure quality control and proper performance, the filter shall be manufactured by an ISO9001 supplier in the supplier’s own manufacturing facility, and not by a contract manufacturer. Filters shall be subject to rigorous quality control checks prior to shipment.

V. An integrated series and shunt reactor shall be used in the construction of the harmonic filter.

W. To ensure generator compatibility, the harmonic filter must never introduce a capacitive reactive power (KVAR), which is greater than 20% of its KVA rating.

X. THiD shall be less than 5% at full load and less than 8% at 30% load.

Y. Capacitor Contactor:

1. Provide a contactor to disconnect the filter capacitor bank based on the motor load current. Two current operated switches shall provide independent adjustment of the pick-up and drop current levels. The switches shall be pre-set at the factory for pick up at 35% and drop out at 20% of the filter output current rating, and shall each be field adjustable over a 0 – 100% current range.

2. Provide control power transformer with two primary fuses and one secondary fuse to supply operating power for the capacitor contactor.

Z. Enclosure:

1. All VFDs shall be housed in enclosures in accordance with Division 46 specifications.

PART 3 - EXECUTION

3.1 GENERAL

A. Supply the VFD(s) with the controls specified herein and as shown on the Contract Drawings.

B. Contractor shall arrange for the VFD supplier to furnish the services of a qualified manufacturer's service representative (one specifically trained and qualified for startup and servicing- no salesperson) to check and supervise the installation. The representative shall, for each of the VFD systems, be on site to do the preliminary testing for not less than two hours, to supervise final testing for not less than four hours, and to instruct the Owner's operator(s) in proper operation at the time of final acceptance for not less than one hour. The representative shall also provide a second one-hour training session during the warranty period at a date requested by the Owner. A day is defined as eight hours.

All times are actual on-site time. Travel and subsistence are the responsibility of the Contractor:

1. The number of actual visits may vary due to the project phasing. Contractor shall provide the hours and visits required to accomplish the requirements herein for the phasing specified. Reference Section 01 10 00 - Summary of Work.

2. Contractor shall provide the Engineer with a written certification in accordance with Section 01 33 00 - Submittals, that the installations, including conduit and wiring and the maximum distances between drive and motor, meet in every way

Herbert, Rowland & Grubic, Inc. 26 29 23-11 005153.0436 the requirements of the VFD manufacturer. Contractor shall make all corrections to the installations to meet the manufacturer's requirements.

3. Times shown will be to cover all drives during each visit or visits, unless additional time is required, which shall be at the Contractor's cost.

C. Submit complete operations and maintenance manual to the Engineer in accordance with Sections 01 78 23 – Operation and Maintenance Data; 01 78 39 Project Record Documents; and 26 05 00 – Electrical-General.

D. Field wiring per manufacturers’ recommendations.

3.2 FIELD TESTING

A. Perform field testing in accordance with Section 01 78 23 - Operation And Maintenance Data and as specified herein.

B. Coordinate VFD testing such that both the Owner and the Engineer are available to witness the testing. Contact both the Engineer and the Owner prior to the proposed test date. The representative of the equipment run by the VFD (pumps, mixers, etc.) shall be present during VFD testing.

C. Have the shop drawing available during testing.

D. Have a copy of the operations and maintenance manual available during testing.

E. Verify that all systems have been electrically connected and that equipment is ready for operation.

F. Testing/Verification/Documentation:

1. Perform general explanation of each system.

2. Provide a written tabulation of all adjustable/settable parameters as set from the factory. In a separate column, all of the actual field adjusted/set values shall be shown.

3. Demonstrate the following and show how each is set/changed:

a. Manual operation both local/remote via VFD.

b. Minimum or default speed to be set for specific equipment operation.

c. Maximum set speed.

d. Adjust acceleration/deceleration times for proper equipment operation.

e. Restart after power outage.

f. Demonstrate starting into rotating motor (shut off circuit breaker and turn right back on).

g. Overcurrent/overvoltage (simulate with test equipment).

h. Overtemperature/low voltage (simulate with test equipment).

i. Phase Loss - Remove on fuse on supply voltage.

j. Auto operation (from input current or voltage signal).

k. Output contacts for alarm/run/status, etc., operate as required, simulate with test lights.

l. Input and output Ethernet communications for all control, alarm and indication parameters specified.

Herbert, Rowland & Grubic, Inc. 26 29 23-12 005153.0436

G. Unit(s) shall operate without unusual or undue noises or vibrations.

H. Contractor to provide a written certification that the VFD installations were started up, adjusted for proper operation, tested, and are operating properly and in accordance with the Contract Documents and the manufacturer's requirements.

3.3 MOUNTING

A. Height - Per Section 26 27 16 - Control Panels and Enclosures.

B. Method and Material - Per Section 26 05 29 - Electrical Supports, Anchors and Fasteners and manufacturer's requirements.

TABLE 26 29 23-1

VARIABLE FREQUENCY DRIVE APPLICATIONS

Spec Section Description

VFD

HP

(KW) Type(2)

NEMA

Enclosure(3) Bypass Input

Voltage

Full Load

(RPM)

Distance to Motor

(feet)

43 26 13 10-VFD-P-101 3 2 4X NO 208 1800 100

43 26 13 10-VFD-P-102 3 2 4X NO 208 1800 100

43 26 13 40-VFD-P-201 3 2 12 NO 208 1800 200

43 26 13 40-VFD-P-202 3 2 12 NO 208 1800 200

43 26 13 40-VFD-P-301 3 2 12 NO 208 1800 120

43 26 13 40-VFD-P-302 3 2 12 NO 208 1800 120

43 26 13 40-VFD-P-303 3 2 12 NO 208 1800 120

43 26 13 40-VFD-P-304 3 2 12 NO 208 1800 120

TABLE 26 29 33-1

(1) Contractor shall verify the motor amperage with each equipment manufacturer/supplier and provide a drive amply sized for the provided equipment.

(2) Type Drive:

1 Variable torque centrifugal pumping application.

2 Variable torque drive application.

3 Variable torque air fan application.

4 Constant torque air pumping application.

5 Constant torque pumping application.

6 Constant torque drive application.

7 Constant torque submersible propeller pump.

8 Constant torque conveyor application.

(3) All open type are installed in motor control centers.

(4) Provide load reactor or dv/dt filters.

(5) Provided as part of an OEM control panel.

(6) Solid state bypass.

END OF SECTION