Product Overview:
The AEG S985-000 is a premium-efficiency three-phase induction motor from the S985 series. It is designed for continuous duty (S1) operation where energy efficiency is a priority. The IE3 efficiency rating makes it suitable for applications with long operating hours, such as HVAC fans, pumps, and compressors, where energy cost savings justify the higher initial investment.

Technical Specifications:

• Rated Power (P2): 0.75 kW (1.0 HP)
• Rated Voltage: 400V AC, 50 Hz (Delta connection) / 230V AC (Star connection)
• Rated Current: 1.7 A (Delta, 400V) / 3.0 A (Star, 230V)
• Rated Speed: 1360 RPM (4-pole, 50 Hz)
• Efficiency (IE3): 82.5% at rated load
• Power Factor (cos φ): 0.82
• Insulation Class: F (155°C)
• Protection Class: IP55
• Frame Size: 80M
• Mounting: B5 (flange-mounted, large flange)
• Ambient Temperature: -15°C to +40°C
• Weight: 8.2 kg
• Noise Level: 62 dB(A) at rated load

Material Composition:

• Frame: Aluminum alloy die-cast (ADC12) with ribbed exterior for heat dissipation
• Stator Core: High-grade silicon steel M500-47A, 0.35 mm lamination thickness (reduced eddy current losses)
• Rotor: Aluminum die-cast squirrel cage, dynamically balanced
• Shaft: Carbon steel C45, ground and polished, keyed with keyway DIN 6885
• Bearings: SKF 6203-2RS (sealed deep groove ball bearing, pre-greased)
• Terminal Box: Aluminum alloy, IP55, with cable glands PG13.5

Structural Features:

• B5 flange mounting with 4 bolt holes on 140 mm bolt circle — direct coupling to pumps/fans
• Terminal box rotatable in 4×90° positions
• Lifting eye on top frame for installation
• External fan (IC411) for forced air cooling
• Drain plug on frame bottom for condensation removal

Working Principle:
Three-phase AC energizes stator windings, producing a rotating magnetic field at 1500 RPM (synchronous). The rotor follows at 1360 RPM with 9.3% slip, which is necessary for torque generation. The reduced slip (compared to IE1 motors) is achieved through optimized rotor bar geometry and thinner stator laminations, resulting in higher efficiency. The external fan forces air over the frame ribs, removing heat generated by copper and iron losses.

Key Advantages:

• IE3 efficiency (82.5%) — saves up to 20% energy versus IE1 motors over 10-year lifetime
• 0.35 mm thin laminations reduce iron losses by 15% versus standard 0.5 mm
• B5 flange mounting enables direct coupling — no adapter plate needed
• Noise level 62 dB(A) — among the quietest in its power class
• SKF bearings — 40,000+ hour L10 life at rated load

Applicable Industries:

• HVAC fan drives (air handling units)
• Centrifugal pump drives
• Refrigeration compressor drives
• Industrial ventilation systems
• Energy-sensitive continuous-duty applications

Installation Requirements:

• Mount on rigid base using 4×M10 anchor bolts on 140 mm bolt circle
• Align shaft with driven equipment to within 0.03 mm TIR using laser alignment tool
• Connect power: U/V/W to L1/L2/L3, PE to frame ground
• Verify rotation direction — reverse any two phases if incorrect

Usage Precautions:

• Do not operate above rated voltage — insulation class F is rated for 155°C maximum winding temperature
• Ensure 300 mm minimum clearance on all sides for air cooling
• Check bearing temperature quarterly — maximum 95°C
• Perform insulation resistance test (≥100 MΩ at 500V DC) every 6 months
• Do not use VFD (Variable Frequency Drive) without verifying motor is inverter-duty rated — standard S985 is line-frequency only