250 kW 3000 rpm Cast Iron Frame Electric Motor 355M-2

250 kW 3000 rpm Cast Iron Frame Electric Motor 355M-2, a HEM Motor three-phase asynchronous motor rated 250 kW / 340 HP. Its robust cast iron frame makes it suitable for dusty, humid and heavy-duty conditions.

Electrical data

Rated power

250 kW / 340 HP

Rated speed

2982 rpm

Power factor (cos φ)

0.91

Rated current 380 V / 400 V / 415 V

436 A / 414 A / 399 A

Rated torque (Mn)

800.6 Nm

Starting torque / rated torque (Ts/Tn)

1.6

Breakdown torque / rated torque (Tmax/Tn)

2.2

Starting current / rated current (Is/In)

7.2

Voltage

400/690 V (Δ/Y)

Frequency

50 Hz

Service factor (SF)

1.15

Mechanical features

Model code

355M-2

Frame

Cast iron (GG20)

IEC frame size

355M

Shaft height (H)

355 mm

Cable entry

2 × M63×1.5

Protection class

IP55

Insulation class

F (155 °C)

Temperature rise

Class B (80 K)

Cooling

IC 411, surface cooling by the fan on the frame

Winding

100% copper

Shaft material

C45 carbon steel

Vibration

≤ 1.8 mm/s

Noise

58–75 dB(A)

Applications: high-speed machines such as pumps, fans, blowers and compressors. For dimensioned drawings, see the technical drawings; for all values, see the technical catalogue.

250 kW 3000 rpm Cast Iron Motor – View

Model: 355M-2

Other options at the same power

• 250 kW 1000 rpm Cast Iron Frame Electric Motor 355L-6
• 250 kW 1500 rpm Cast Iron Frame Electric Motor 355M-4

250 kW Cast Iron Frame Motor – Details

Model: 355M-2

Technical comparison

• Current: 414.00 A at 400 V, about 2,981 A at start (1.66 A per kW). Compare with other ratings
• Torque: rated 800.6 Nm, about 1,281.0 Nm at start. Same power: 800.6 Nm at 3000 rpm, 1602 Nm at 1500 rpm, 2412 Nm at 1000 rpm. Torque table
• 355M frame: shaft height 355 mm; same frame: 160 kW 1000 rpm, 185 kW 1000 rpm, 200 kW 1000 rpm, 250 kW 1500 rpm. Frame – power table

Frequently Asked Questions

How many amps does a 250 kW 3000 rpm motor draw?

On a 400 V supply it draws about 414 A at full load.

Will it replace my old motor?

If your old motor also has an IEC 355M frame, that is the first piece of information for assessing mounting compatibility. To confirm the fit, compare the mounting type, shaft diameter and length, foot hole spacing, flange dimensions if any, as well as power, speed and electrical data. Send photos of your current motor’s nameplate and connections on WhatsApp and we will confirm the right model.

How can I order?

Fill in the order form above and send it via WhatsApp, or call +90 532 345 49 86.