variABLE FREQUENCY DRIVE – NEMA 7

VARIABLE FREQUENCY DRIVE – NEMA 7

PART 1GENERAL

1.01SCOPE

  1. This specification describes the electrical, mechanical, environmental, agency and reliability requirements for three-phase, Variable Frequency Drives (VFD) as specified herein and as shown on the contract drawings.

1.02REFERENCES

  1. The variable frequency drives and all components shall be designed, manufactured and tested in accordance with the latest applicable standards.
  1. Underwriters Laboratories & National Electrical Manufacturer’s Association (NEMA)
  2. UL 1203
  3. UL: Class I, Division 1 & Division 2, Groups B, C, and D
  4. cUL Class I, Division 1 & Division 2, Groups C, and D
  1. National Electrical Manufacturer’s Association (NEMA)
  2. NEMA 7
  3. NEMA 4X
  1. In case of conflict between the requirements of this section and those of the listed documents, the requirements of this section shall prevail.

1.03SUBMITTALS - FOR REVIEW/APPROVAL

  1. The following information shall be submitted to the Engineer.
  2. Dimensioned outline drawing
  3. Schematic diagram
  4. Power and control connection diagram(s)
  5. Submit four (4) copies of the above information.

1.04SUBMITTALS-FOR INFORMATION

  1. When requested by the Engineer the following product information shall be submitted:
  2. Descriptive bulletins
  3. Product sheets

1.05SUBMITTALS-FOR CLOSEOUT

  1. The following information shall be submitted for record purposes prior to final payment.
  2. Final as-built drawings and information for items listed section in 1.04.
  3. Installation information.

1.06QUALIFICATIONS

  1. For the equipment specified herein, the manufacturer shall be ISO 9001 certified.
  2. The supplier of this equipment shall have produced similar electrical equipment for a minimum period of ten (10) years. When requested by the Engineer, an acceptable list of installations with similar equipment shall be provided demonstrating compliance with this requirement.
  3. Variable Frequency Drives shall be on the basis of Eaton Crouse-Hinds ACE Series for function and quality. Products that are in compliance with the specification and manufactured by others will be considered as “Approved Equal” only if pre-approved by the Engineer fourteen (14) days prior to bid date. Alternate suppliers shall submit documentation showing itemized compliance to the specifications and experience specific to the proposed VFD including a list showing details of the installation, application, location, contact name and telephone number of at least 10 users.

1.07REGULATORY REQUIREMENTS

1.08DELIVERY, STORAGE, AND HANDLING

  1. Equipment shall be handled and stored in accordance with manufacturer's instructions. One (1) copy of these instructions shall be included with the equipment at time of shipment.

PART 2PRODUCTS

2.01MANUFACTURERS

  1. Eaton’s Crouse-Hinds Business
  2. ______
  3. ______

Naming specific venders does not imply acceptance of their standard products nor relieve them from meeting these specifications in their entirety.

2.02NEMA 7 VariABLE FREQUENCY DRIVE (VFD)

  1. Where shown on the drawings, NEMA 7 variable frequency drives 1 through 75 Horsepower (HP), Constant Torque (CT) / Variable Torque (VT), shall have the following features:
  2. Shall be rated for 480 VAC (optional input voltages of 208, 240, 380 and 575 VAC).
  3. Shall have fusible disconnect with a thru-the-door operator
  4. Incorporate a an explosion proof window in the NEMA 7 enclosure to allow Interface Module to viewed without need to open NEMA 7 enclosure
  5. Shall have means to control VFD without need to open NEMA 7 enclosure
  6. Shall have indicator lights in cover of the NEMA 7 enclosure to indicate Run, Stop, & Alarm modes
  7. The VFD shall have a one (1) minute overload current rating of 150% for constant torque drives. The VFD shall have a one (1) minute overload current rating of 110% for variable torque drives.
  8. All VFD components shall be mounted in an explosion proof enclosure properly sized to dissipate the heat generated by the drive within the limits of the specified environmental operating conditions. Adequate space shall be provided in the bottom of the drive for incoming and outgoing conduit exits.
  9. Shall include stainless steel, sintered metal filters with pre-filters as standard
  10. Enclosure shall be epoxy painted as standard
  11. Enclosure cover shall include stainless steel hinges and stainless steel, triple lead spring loaded bolts
  12. Standard operating conditions shall be:
  13. Incoming Power: Three-phase, [208 – 240] [380 – 500][525 – 600] Vac (+10% to -15%) and 50/60 Hz (+/-5 Hz) power to a fixed potential DC bus level.
  14. Ambient Temperature: -10C to 50C (14F to 122F)
  15. On-board Communication
  16. The VFD shall include the following communication options: Ethernet, Modbus, Wireless,Profibus, CANopen, Devicenet

PART 3EXECUTION

3.01MAINTENANCE / WARRANTY SERVICE

  1. Warranty to commence 12 months from the date shipment and include all parts, labor, and travel time.

3.02TRAINING

  1. The Contractor shall provide a training session for up to ____ owner's representatives for  ____ normal workdays with a maximum of  ____ trips at a job site location determined by the owner. Training and instruction time shall be in addition to that required for start-up service.
  2. The manufacturer’s qualified representative shall conduct the training.
  3. The training program shall consist of the following:
  4. Instructions on the proper operation of the equipment.
  5. Instructions on the proper maintenance of the equipment.

9/22/14

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