Specifications include, but are not limited to: 2.8 Performance Rating: Seller’s equipment shall meet the requested performance ratings: 2.8.1 The variable frequency drive (VFD) shall be designed to operate in one of the following input voltage classes with -15%/+10% voltage tolerance: 1. 380 to 480 VAC, 3 phase. 2.8.2 The VFD shall operate from an input frequency range of 47 to 63 Hz. 2.8.3 The VFD shall have a power rating of: 1. 380 to 480V: 0.4 to 22 kW / 0.5 to 30 HP. 2.8.4 The displacement power factor of the VFD shall be between 1.0 and 0.95, lagging, over the entire speed range. 2.8.5 The efficiency of the VFD shall be a minimum of 97% at full load and speed. 2.8.6 The overload capability shall be: 1. Normal Duty – 110% for up to 1 minute, 150% for up to 3 seconds. 2. Heavy Duty – 150% for up to 1 minute, 180% for up to 3 seconds (200% programmable). 2.8.7 The VFD shall have a maximum output frequency of 500 Hz. 2.8.8 The VFD shall provide UL Listed Class 10 motor overload protection to comply with N.E.C. Article 430. 2.8.9 The VFD shall be designed to operate in the following environmental conditions: 1. Ambient temperature range: a. -20°C to 50°C (-4°F to 122°F). b. -20°C to 60°C (-4°F to 140°F) with current derating. c. -20°C to 70°C (-4°F to 158°F) with current derating and control module fan kit (available option, but not required to be provided). 2. Relative humidity range – 0% to 95% non-condensing 2.11 Control I/O (input/output): 2.11.1 The variable frequency drive (VFD) shall have 2 analog inputs (1 unipolar and 1 bipolar), independently isolated from the rest of the drive I/O. 2.11.2 The VFD shall have 7 digital inputs (24 VDC, 6 programmable) to provide application versatility. 2.11.3 The VFD shall have 1 analog output that is scalable, 10-bit, suitable for metering or as a speed reference for another drive. 2.11.4 The VFD shall have 2 digital outputs and 2 relay outputs (1 form A and 1 form B) to be used to indicate various drive, motor or logic conditions. 2.12 Dimensions 2.12.1 Frame A: 152 mm (5.98 in.) H x 72 mm (2.83 in.) W x 172 mm (6.77 in.) D B. Frame B: 180 mm (7.08 in.) H x 87 mm (3.42 in.) W x 172 mm (6.77 in.) D C. Frame C: 220 mm (8.66 in.) H x 109 mm (4.29 in.) W x 184 mm (7.24 in.) D D.