C04 Attachment 2 Specifications.pdf
PDF 104 KB Posted
- Attached to
- Two (2) Variable Frequency Drives (Ames, IA)
- Solicitation number
- 1232SA26Q1285
About this file
This document is a Specifications sheet for the procurement of two new Variable Frequency Drives (VFDs) to replace end-of-life units at a USDA chilled water plant facility.
The procurement requires two units that are documentable and pre-approved equivalents to an Altivar 660 (model ATV660C16T4N2ANYBBNX), sized for 460 Vac 3-phase motors operating at 250 horsepower with normal duty rating. The units must maintain a footprint comparable to the existing drive (25 inches deep, 31½ inches wide, 93 inches tall) and include a main circuit breaker disconnect, 100k AIC rating, Type 12 enclosure, UL508A label, and RAL7035 gray finish. Each unit shall have a 302 max output amp controller, standard IEC-rated bypass contactors with mechanical and electrical interlocking, isolation and bypass contactor sequencing for true motor isolation, remote automatic bypass operation, and a dv/dt motor filter. Control options must include AFC-Off-Bypass and Hand-Off-Auto selector switches, Start/Stop push buttons, Test-Normal selector switch, and speed potentiometer. Pilot light provisions include bypass (yellow), overload trip (yellow), power on (red), run (green), and trip (yellow) indicators. Auxiliary contacts shall include normally open/normally closed run and trip contacts, normally open/normally closed bypass run contact, normally open auto mode contact, and a line reactor as standard output filter. The units must be compatible with Johnson Controls Metasys N2 communication. Delivery is required 60 days after receipt of order to USDA, 1920 Dayton Avenue, Building 24, Ames, IA 50010.
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| File | Type | Posted |
|---|---|---|
| C04 Attachment 1 Provisions and Clauses 1232SA26Q1285.pdf |
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Specifications
Project: Procurement of (2) two new Variable Frequency Drives
GENERAL INFORMATION
1.0 Scope of Work: Purchasing (2) two Variable Frequency Drives (VFD) to replace an end-of-life existing VFDs.
2.0 Background: The chilled water plant has 4 secondary chilled water pumps that operate with the chilled water system. The VFDs with the labels “SCHP-3” and “SCHP-4” has reached their end of life and parts to repair them have become obsolete. It will be more cost effective to replace these units with new ones.
REQUIREMENTS – Equivalent and salient characteristics
3.0 Technical Requirements/Tasks:
New units shall be documentable and pre-approved equivalent to an Altivar 660, ATV660C16T4N2ANYBBNX.
Qty: 2 units, delivered.
Unit footprints shall be the same size or similar to existing Altivar 660 VFD footprint. Size of existing unit is 25 inches deep, 31 ½ inches wide and 93 inches tall.
Minimum technical specifications shall include:
Unit shall have main circuit breaker disconnect Unit shall be 100k AIC (Ampere Interrupting Capacity) rated Unit shall be selected for 460 Vac 3 phase motor Unit shall operate with 250 Horsepower Unit shall be sized for Normal duty.
Unit drive controller shall be rated for 302 Max. Output Amps Unit Max. Output Current Rating Will Be Lower Than the Continuous Output
Current Rating Of The Drive When Bypass Option Is Selected.
Unit shall include Type 12 Enclosure Unit shall have UL508A Label Unit shall be RAL7035 (Gray) Unit shall include Standard IEC Rated Bypass Contactors Unit shall include Isolation and bypass contactors (with mechanical and electrical interlocking).
Unit shall include Isolation and bypass contactor sequencing provides true motor isolation.
Unit shall include Remote automatic bypass operation using Auto Start contacts.
Unit shall include Dv/Dt Motor Filter (Voltage Rate of Change Filter)
Minimum control options shall include:
Unit shall include AFC-Off-Bypass selector switch Unit shall include Hand-Off-Auto selector switch
Unit shall include Start/Stop push buttons Unit shall include Test-Normal selector switch Unit shall include Speed Potentiometer
Minimum Pilot Light options shall include:
Unit shall include Bypass pilot light (yellow) Unit shall include Overload Trip pilot light (yellow) Unit shall include Power on pilot light (red) Unit shall include Run pilot light (green) Unit shall include Trip pilot light (yellow)
Minimum Auxiliary contacts shall include:
1 Normally Open/Normally Closed run contact 1 Normally Open/Normally Closed trip contact 1 Normally Open/Normally Closed bypass run contact 1 Normally Open auto mode contact Unit shall include Line Reactor as standard Output Filter Unit shall be compatible with Johnson Controls Metasys N2 Communication
4.0 Deliverables/Schedule: 60 days after receipt of order
5.0 Place of Delivery: USDA, 1920 Dayton Avenue, Bldg 24, Ames, IA 50010
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