IE4 and IE5 cast iron electric motors sit at the top of the IEC 60034-30-1 efficiency classification and are built for plants that run continuously under load. As an Izmir-based supplier, DRG Motor combines these efficiency classes with a cast iron frame to deliver both high efficiency and mechanical strength in a single unit.

The Efficiency Gap Between IE4 and IE5

The IE4 Super Premium class noticeably lowers losses compared with an IE3 motor of the same rating, while IE5 Ultra Premium cuts losses further, by roughly a fifth relative to IE4. The difference shows up clearly on the energy bill in ratings above 7.5 kW and in applications running more than twelve hours a day. For this reason, pumps, fans and compressors with continuous duty favour the higher efficiency class.

What the Cast Iron Frame Adds

A cast iron frame offers greater vibration damping and thermal mass than aluminium. This keeps the motor stable against shock and load swings in heavy industrial settings and holds winding temperature more evenly. With Class F insulation and IP55 protection, frame life is extended on dusty, humid lines.

Suitable Applications

These motors are available in 2, 4 and 6-pole versions, running at 3000, 1500 and 1000 rpm respectively on a 50 Hz supply. B3 foot-mounted, B5 flange-mounted and B14 face-mounted options fit directly onto existing gearbox and pump connections. Continuous lines in textiles, food, water treatment and chemical plants recover the energy investment fastest.

IE4-IE5 Supply in Izmir

As an Izmir-based supplier, DRG Motor offers IE4 and IE5 cast iron motors from 0.55 to 355 kW, both from stock and made to order. Contact our sales team to set the power, speed and mounting type to your needs and to confirm delivery times.