ABB AMI 630L2AB High Voltage Squirrel Cage Induction Motor | 5000kW‑6200kW, 2 Pole, 3000V

The ABB AMI 630L2AB is a large‑frame modular high‑voltage squirrel‑cage induction motor built on ABB proven AMI modular platform, covering power range from 5000 kW to 6200 kW, 2‑pole configuration and rated voltage 3000 V. Manufactured in compliance with IEC and NEMA standardsABB Group, this welded‑steel frame motor is designed for S1 continuous full‑load heavy‑duty operation. Its highly‑modular mechanical architecture supports flexible selection of cooling systems, monitoring sensors and auxiliary assemblies. It is widely adopted in thermal power, petrochemical, metallurgy and large‑scale industrial facilities to drive critical high‑speed equipment such as large process compressors, main blowers and heavy‑flow pumpsABB Group.

Core Technical Parameters

Electromagnetic design is optimised for high‑speed 2‑pole heavy‑load conditions via multi‑working‑point finite‑element simulation. Stator core is stacked with premium low‑loss silicon‑steel laminations to minimise iron loss, stray loss and magnetic leakage under long‑duration full‑load running. Stator windings adopt high‑grade corona‑resistant magnet wire and go through complete VPI vacuum‑pressure‑impregnation process. Robust reinforced winding end structure improves dielectric strength, thermal stability and anti‑electrical‑aging capability, resisting industrial grid voltage fluctuation and frequent startup impulse. For this ultra‑high‑power 2‑pole unit, heavy‑duty copper‑bar squirrel‑cage rotor is standard configuration, delivering exceptional mechanical rigidity, low rotor loss and stable starting performance. Each rotor assembly undergoes multi‑stage high‑precision dynamic balance calibration to strictly constrain vibration and noise, which is essential for reliable long‑term 3000 rpm high‑speed operation.

The welded modular steel‑plate frame represents the core feature of ABB AMI series, enabling flexible re‑configuration of cooling, monitoring and auxiliary components according to project demandsABB Group. Standard cooling solution is IC611 air‑to‑air closed cooling: two fully independent air loops are arranged inside the motor. Internal hot air circulates within sealed housing and transfers heat to external ambient air through top‑mounted air‑to‑air heat exchanger. The IP55 enclosure provides reliable protection against dust and water spray, making the motor suitable for dusty, humid industrial environments where open‑ventilated motors cannot be deployed. For sites with insufficient cooling air supply, IC81W air‑to‑water cooling can be selected for enhanced heat‑dissipation performance.

Bearing system is purpose‑engineered for high‑speed, high‑power continuous operation. Large‑size heavy‑duty sliding bearings are equipped as standard for this frame size; high‑performance rolling bearings are available as alternative upon request. PT100 temperature sensors can be pre‑embedded inside stator windings and bearing housings as factory option, feeding real‑time temperature data to plant DCS system for remote condition monitoring and over‑temperature protection. Space heater is fitted as option to avoid winding condensation during motor stand‑by periods. For variable‑frequency speed‑control applications, IC616 cooling variant can be supplied to guarantee adequate cooling airflow under low‑speed operation. Customisation options cover ATEX hazardous‑area modification, high‑altitude adaptation, tropical anti‑humidity & anti‑corrosion coating, special terminal‑box layout and double‑shaft extension to satisfy complex project requirementsABB Group.

Typical driven machinery includes large‑capacity process compressors, main industrial blowers and heavy‑flow centrifugal pumps. It supports direct‑on‑line startup or high‑voltage soft‑starter configuration depending on local grid short‑circuit capacity. Every motor completes comprehensive factory acceptance tests before shipment, including insulation‑resistance test, high‑voltage withstand test, no‑load running test, efficiency verification, vibration and noise measurement. Leveraging ABB mature modular AMI platform, AMI 630L2AB delivers high operational reliability, good spare‑part interchangeability and low total‑cost‑of‑ownership for mission‑critical high‑speed heavy‑duty industrial processes.