WEG W21‑90KW‑6P‑W315S/M‑380V‑50HZ‑IE3‑B3T Motor Specifications

WEG W21 cast‑iron frame three‑phase IE3 high‑efficiency asynchronous motor, B3T (foot‑mounted, terminal box on top), IC411 TEFC Totally Enclosed Fan‑Cooled

Model Code Explanation

Electrical Data (50 Hz)

• Rated Power: 90 kW
• Poles: 6‑pole; Synchronous speed: 1000 rpm; Rated speed: 991 rpm
• Rated Voltage: 380‑415V (Delta) / 660‑690V (Star)
• Rated Current (380V Delta): 167 A
• Rated Torque: 868 N·m
• Power Factor cosφ: 0.82 (full load)
• IE3 Efficiency: ≥94.9% at full load, approx. 95.0% at 75% load
• Locked‑rotor current ratio LRC: 6.4 × In
• Starting Torque: 220% Tn; Maximum Torque: 250% Tn
• Duty Cycle: S1 Continuous running
• Insulation Class: Class F (temperature rise assessed per Class B, 80K)

Mechanical & Environmental Data

• Protection Class: IP55
• Cooling Method: IC411 TEFC Totally Enclosed Fan‑Cooled
• Mounting Arrangement: B3T (foot‑mounted, no flange, 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: 5.42 kg·m²
• Bearings: DE NU319C3; NDE 6319C3
• Weight: approx. 970‑1020 kg
• Ambient Temperature: ‑20℃ ~ +40℃, altitude ≤1000 m
• Standard supply: 1 set PTC thermistors per phase for winding protection (for frame 315)
• Terminal box: Top entry, rotatable, suitable for VFD operation

IEC 315S/M‑6P B3 Mounting Dimensions

• Centre height H: 315 mm
• Foot mounting hole spacing A: 500 mm; B: 400 mm
• Foot width C: 216 mm
• Shaft diameter D: 80 mm, key 22×14
• Shaft extension E: 170 mm