ABB AMA High Voltage Modular Induction Motors
The ABB AMA High Voltage Motor Series (featured model: AMA 450L4A 600 kW 6.6 kV) is ABB's specialized high-voltage modular induction motor platform, engineered for severe continuous duty across power generation, municipal water works, petrochemical refining, cement manufacturing, and mining plants. Built upon a rigid, welded-steel frame architecture, AMA motors offer exceptional thermal dissipation, structural vibration resistance, and custom-configurable cooling top-modules including **IC01 (open-drip-proof / weather-protected)**, **IC611 (air-to-air heat exchanger)**, and **IC81W (air-to-water heat exchanger)**. Covering power output ratings from 140 kW up to 2000 kW across high voltage grid supplies from 2.3 kV up to 11 kV (AMA 315, AMA 355, AMA 400, AMA 450, and AMA 500 frame sizes), AMA motors feature **Vacuum Pressure Impregnated (VPI)** Class H insulation rated for direct VFD speed control with **ABB ACS880 and MEGADRIVE medium voltage drives**. Designed for maximum plant uptime, ABB AMA motors serve as the direct, modernized replacement for legacy **ABB HXR** and early-generation modular high-voltage induction motors in boiler feed pumps, ID/FD fans, water pipeline boosters, and mill crushers.
Technical Specifications
| Featured Model | AMA 450L4A (600 kW, 4-Pole, 6.6 kV 50Hz, VPI Insulation, Foot Mount B3) |
|---|---|
| Brand / Manufacturer | ABB (High Voltage Motors Division) |
| Product Series | AMA Series High Voltage Modular Induction Motors |
| Frame Sizes Covered | AMA 315, AMA 355, AMA 400, AMA 450, AMA 500 (5 Key Frame Sizes) |
| Rated Power Range | 140 kW to 2000 kW (190 HP to 2700 HP) |
| High Voltage Supply | 2.3 kV, 3.3 kV, 6.0 kV, 6.6 kV, 10.0 kV, 11.0 kV AC (50/60 Hz) |
| Cooling & Enclosure Options | IC01 / IP23 (Weather-Protected), IC611 / IP55 (Air-to-Air), IC81W / IP55 (Air-to-Water) |
| Insulation System | Class F/H VPI (Vacuum Pressure Impregnation) System — VFD Inverter Duty Rated |
Documentation & Resources
ABB AMA Series Frame Size, Voltage & Power Rating Matrix
Full selection matrix for ABB AMA high voltage modular induction motors. Review frame sizes, supply voltage options, 4-pole power outputs, and cooling configurations:
| Motor Frame Size | Power Output (4-Pole 50Hz) | High Voltage Supply Options | Available Cooling Methods | Bearing & Mount Execution |
|---|---|---|---|---|
| AMA 315 | 140 kW - 315 kW | 2.3 kV, 3.3 kV, 6.0 kV, 6.6 kV | IC01, IC611, IC81W | Rolling Element Bearings / IM B3 Foot |
| AMA 355 | 250 kW - 500 kW | 3.3 kV, 6.0 kV, 6.6 kV, 10 kV | IC01, IC611, IC81W | Rolling Element / Sleeve Bearings |
| AMA 400 | 400 kW - 800 kW | 3.3 kV, 6.0 kV, 6.6 kV, 10 kV, 11 kV | IC01, IC611, IC81W | Regreasable Rolling / Insulated Sleeve |
| AMA 450 | 600 kW - 1250 kW | 3.3 kV, 6.0 kV, 6.6 kV, 10 kV, 11 kV | IC01, IC611, IC81W | Hydrodynamic Sleeve Bearings Standard |
| AMA 500 | 1000 kW - 2000 kW | 6.0 kV, 6.6 kV, 10 kV, 11 kV | IC01, IC611, IC81W | Sleeve Bearings with Forced Lubrication |
Legacy ABB HXR & Early High Voltage Motors to AMA Upgrade Guide
Obsolete ABB HXR cast-iron high voltage motors and early-generation modular induction motors can be directly upgraded to modern ABB AMA motors with 100% mechanical shaft height alignment:
| Legacy ABB Motor Code (Obsolete) | Legacy Power & Voltage | Current AMA Equivalent Model | Key Upgrades & Operational Advantages |
|---|---|---|---|
| HXR 35554 / HXR 355L4 | 250 kW - 400 kW / 6.6 kV | ABB AMA 355L4A Direct Upgrade | VPI Class H insulation, lower noise emissions, improved VFD harmonic tolerance. |
| HXR 40054 / HXR 400L4 | 450 kW - 630 kW / 6.6 kV | ABB AMA 400L4A Direct Upgrade | Modular cooling top-module design (easy IC611 to IC81W swap), lower vibration levels. |
| HXR 45054 / HXR 450L4 | 630 kW - 1000 kW / 10 kV | ABB AMA 450L4A Direct Upgrade | Matches standard B3 foot bolt hole centers, insulated sleeve bearings prevent shaft currents. |
| HXR 50054 / HXR 500L4 | 1120 kW - 1600 kW / 11 kV | ABB AMA 500L4A Direct Upgrade | Higher efficiency under partial loads, PT100 winding & bearing temperature monitoring. |
Expert Technical Sourcing & High Voltage System Integration Notes
When replacing older ABB HXR or early-generation modular high-voltage motors in critical pumping stations, power plant ID/FD draft fans, or mining compressors, switching to current ABB AMA motors provides immediate benefits: VPI insulation rated for high VFD switching frequencies, reduced energy losses, lower vibration levels, and compliance with modern IEC high-voltage standards. Simply supply us with your existing motor nameplate serial number or complete order code (e.g., HXR 450L4 or AMA 450L4A), and our technical engineering team will deliver a 100% compliant high-voltage replacement specification and proposal.
Core Benchmark Model Standard Configurations
- AMA 315M4A (200 kW 6.6kV IC611)
- AMA 315L4A (315 kW 6.6kV IC611)
- AMA 355M4A (400 kW 6.6kV IC611)
- AMA 355L4A (500 kW 6.6kV IC611)
- AMA 400M4A (630 kW 6.6kV IC611)
- AMA 400L4A (800 kW 6.6kV IC611)
- AMA 450M4A (900 kW 10kV IC81W)
- AMA 450L4A (1250 kW 10kV IC81W)
- AMA 500M4A (1600 kW 11kV IC81W)
- AMA 500L4A (2000 kW 11kV IC81W)
- ABB HXR 355L4 Motor Replacement
- ABB HXR 400L4 Motor Replacement
- ABB HXR 450L4 Motor Replacement
- ABB HXR 500L4 Motor Replacement
- AMA 400 6.6kV Boiler Feed Pump Motor
- AMA 450 10kV Water Pipeline Booster
- AMA 500 11kV Mining Crusher Drive
- ABB HV Motor IC81W Air-Water Cooler
- ABB HV Motor Sleeve Bearing Unit
- ABB HV Motor VPI Inverter Insulation
