DESCRIPTION A. Provide all variable frequency drives (VFD) as indicated on the Single Line Diagram sketch. Owner shall coordinate variable frequency drive Manufacturer selection with all equipment Manufacturers. Ensure AIC of new VFD enclosures are equal to the rating of existing Motor Control Center. B. Variable frequency drives which are shown to be located in a standalone enclosure are not required to be of the same Manufacturer as any variable frequency drives installed within the motor control center. C. Acceptable Manufacturers are ASEA Brown-Boveri (ABB), Toshiba, Square D, or equal. 1.2 REQUIREMENTS SPECIFIED ELSEWHERE A. Additional Requirements are specified elsewhere including: 1. Section 16160 – Cabinets and Enclosures 2. Section 16900 - Controls 1.3 QUALITY ASSURANCE A. The equipment specified herein is based upon the first Manufacturer named after the phrase "Acceptable Manufacturer's". Equipment types, device ratings, dimensions, etc. correspond to the nomenclature dictated by that Manufacturer. Equipment of other acceptable Manufacturers shall be equivalent in every way to that of the equipment specified. B. Suppliers deemed equivalent shall be responsible to support and supply equivalent equipment which shall meet the intended design. C. All equipment shall be tested at the factory. Unless specified elsewhere, standard factory inspection and operational tests will be acceptable. 1.4 SUBMITTALS TO THE ENGINEER A. Shop Drawings are required for all items provided under this section. Submittals shall be provided in accordance with this section. 1. Prior to fabrication a. Components… b. Assembly… c. Diagrams… d. System analysis documentation and verification for application 2. Prior to startup a. VFD Parameter Setup Checklist 3. After startup a. VFD parameter setup verification and record version of VFD Parameter Setup PART 2 - PRODUCTS 2.1 MATERIALS A. Variable Frequency Drives 1. The drive shall be capable of varying the speed of a standard or inverter duty rated NEMA Design B induction motor from a virtual standstill to the standard speed of the motor. The unit shall transform input power into a variable voltage, adjustable frequency three phase output of suitable capacity and waveform. 2. Input voltage shall be as indicated on the Drawings and/or as specified in the equipment specification sections. Frequency shall be 60 Hz. 3. Output shall be three (3) phase voltage as indicated on the Drawings and/or as specified in the equipment specification sections. 4. The drive shall be a PWM (Pulse Width Modulated) transistorized inverter. 5. The drive Manufacturer shall have not less than five years of experience in the manufacture of drives in the United States. 6. The drives shall be rated for constant or variable torque applications (460V - 1 HP to 150 HP), depending on the individual driven load requirements. For constant torque applications, the output transistors shall be low-gain, fully rated. Derated high-gain transistors are not acceptable. 7. Power Line Considerations
