WEG W21‑55KW‑8P‑315S/M‑660V‑50HZ‑IE3‑IP66‑V1T Motor Specifications

WEG W21 cast‑iron frame three‑phase IE3 high‑efficiency induction motor. V1T = V1 vertical flange mounting (shaft down), T‑terminal box on top; IP66 high protection, IC411 TEFC Totally Enclosed Fan‑Cooled

Model Code Explanation

Electrical Data (50 Hz, 660V Star)

• Rated Power: 55 kW
• Poles: 8‑pole; Synchronous speed: 750 rpm; Rated speed: 735 rpm
• Rated Voltage: 660V (Star) / 380‑415V (Delta)
• Rated Current (660V Star): 62.0 A
• Rated Torque: 714 N·m
• Power Factor cosφ: 0.78 (full load)
• IE3 Efficiency: ≥93.0% at full load, approx. 93.3% at 75% load
• Locked‑rotor current ratio LRC: 6.2 × In
• Starting Torque: 210% Tn; Maximum Torque: 240% Tn
• Duty Cycle: S1 Continuous running
• Insulation Class: Class F (temperature rise assessed per Class B, 80K)

Mechanical & Environmental Data

• Protection Class: IP66 (with automatic drain plugs)
• Cooling Method: IC411 TEFC Totally Enclosed Fan‑Cooled
• Mounting Arrangement: V1T (vertical flange mounting, shaft downward, no feet, terminal box on top)
• Frame Material: Cast iron 315S/M
• Shaft Extension: Φ80 mm, key 22×14, shaft extension length 170 mm
• Moment of Inertia J: 7.10 kg·m²
• Bearings: DE NU319C3; NDE 6319C3; vertical‑oriented bearing arrangement, regreasing nipples on both ends
• Weight: approx. 990‑1040 kg
• Ambient Temperature: ‑20℃ ~ +40℃, altitude ≤1000 m
• Standard supply: PTC thermistors per‑phase for winding protection; W3 labyrinth shaft seals for IP66WEG
• Terminal box: Top entry, rotatable, suitable for VFD operation

IEC 315S/M‑8P V1 (B5 Vertical) Flange Mounting Dimensions

• Centre height H: 315 mm
• FF Flange: Flange OD 550 mm, spigot 450 mm, mounting holes M16
• Shaft diameter D: 80 mm, key 22×14
• Shaft extension E: 170 mm