CHT 355 Three-Phase Cast Iron Motor (160–315 kW)
CHT 355 three-phase cast iron motor — Chiaravalli's IEC frame 355 cast iron motors in the IE3 / IE4 efficiency classes, 2 / 4 / 6-pole, 160–315 kW. Cast iron casing, IP54, class F insulation, IC411 fan cooling, Δ/Y 400/690 V 50 Hz. Mounting B3, B5 or B35 — the dimension sheets give the frame 355 mounting dimensions per efficiency class.
How to pick from the table: choose the pole count for the speed you need, then the power and the efficiency class — IE3 or IE4 (we supply IE3 and above only from 0.75 kW up; IE4 where the energy saving pays). The type letter is the motor's length designation within the frame. Forced-cooling fan kits for inverter duty are available for every frame (catalogue p8).
Product Configuration
Select a row to add it to your quote
Three-phase Δ/Y 400/690 V 50 Hz; IP54, insulation class F, IC411 cooling; efficiency to IEC 60034-30 / 60034-2-1.
| Code | Type | Efficiency class | Poles | Power | Speed | Torque | Current at 400 V | Efficiency | cos φ | Efficiency at 75 % | Efficiency at 50 % | Ms / Mn | Mmax / Mn | Is / In | J0 | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CHT 355 MA6 IE3 |
MA6
|
IE3
|
6
|
160 kW
|
980 r/min
|
1559.2 Nm
|
294.6 A
|
95.6 %
|
0.82
|
95.8 %
|
94.3 %
|
2
|
2.3
|
7.5
|
8.9764 kg m²
|
1419.0 kg
|
CHT 355 MA6 IE4 |
MA6
|
IE4
|
6
|
160 kW
|
990 r/min
|
1544.1 Nm
|
279.1 A
|
96.2 %
|
0.86
|
96.3 %
|
96 %
|
1.6
|
2
|
8
|
12.1405 kg m²
|
1432.0 kg
|
CHT 355 MB6 IE3 |
MB6
|
IE3
|
6
|
200 kW
|
980 r/min
|
1949 Nm
|
367.5 A
|
95.8 %
|
0.82
|
95.8 %
|
94.3 %
|
2
|
2.3
|
7.5
|
11.0018 kg m²
|
1571.0 kg
|
CHT 355 MB6 IE4 |
MB6
|
IE4
|
6
|
200 kW
|
990 r/min
|
1930.1 Nm
|
348.6 A
|
96.3 %
|
0.86
|
96.3 %
|
96.1 %
|
1.6
|
2
|
8
|
15.0369 kg m²
|
1656.0 kg
|
CHT 355 MA2 IE3 |
MA2
|
IE3
|
2
|
220 kW
|
2960 r/min
|
709.8 Nm
|
394.6 A
|
95.8 %
|
0.84
|
96.2 %
|
94.8 %
|
2
|
2.3
|
6.5
|
2.9559 kg m²
|
1501.0 kg
|
CHT 355 MA4 IE3 |
MA4
|
IE3
|
4
|
220 kW
|
1480 r/min
|
1419.6 Nm
|
371.7 A
|
96 %
|
0.89
|
96.2 %
|
95.3 %
|
2
|
2.3
|
8
|
7.0423 kg m²
|
1395.0 kg
|
CHT 355 LA6 IE3 |
LA6
|
IE3
|
6
|
220 kW
|
980 r/min
|
2143.9 Nm
|
404.2 A
|
95.8 %
|
0.82
|
96 %
|
94.2 %
|
2
|
2.3
|
7.5
|
11.6413 kg m²
|
1659.0 kg
|
CHT 355 MB2 IE3 |
MB2
|
IE3
|
2
|
250 kW
|
2960 r/min
|
806.6 Nm
|
448.4 A
|
95.8 %
|
0.84
|
96.2 %
|
94.8 %
|
2
|
2.3
|
6.5
|
3.1427 kg m²
|
1538.0 kg
|
CHT 355 MB2 IE4 |
MB2
|
IE4
|
2
|
250 kW
|
2980 r/min
|
801.5 Nm
|
420.1 A
|
96.5 %
|
0.89
|
96.5 %
|
96 %
|
1.6
|
2.2
|
8.5
|
4.481 kg m²
|
1678.0 kg
|
CHT 355 MB4 IE3 |
MB4
|
IE3
|
4
|
250 kW
|
1480 r/min
|
1613.2 Nm
|
422.3 A
|
96 %
|
0.89
|
96.3 %
|
95.4 %
|
2
|
2.3
|
7.2
|
7.6382 kg m²
|
1467.0 kg
|
CHT 355 MB4 IE4 |
MB4
|
IE4
|
4
|
250 kW
|
1485 r/min
|
1608.4 Nm
|
414.6 A
|
96.7 %
|
0.9
|
96.7 %
|
96.3 %
|
1.8
|
2.2
|
8.5
|
10.2116 kg m²
|
1491.0 kg
|
CHT 355 LB6 IE3 |
LB6
|
IE3
|
6
|
250 kW
|
980 r/min
|
2436.2 Nm
|
459.3 A
|
95.8 %
|
0.82
|
96 %
|
94.3 %
|
2
|
2.3
|
7.5
|
13.5601 kg m²
|
1846.0 kg
|
CHT 355 LB6 IE4 |
LB6
|
IE4
|
6
|
250 kW
|
990 r/min
|
2412.7 Nm
|
434.8 A
|
96.5 %
|
0.86
|
96.5 %
|
96.4 %
|
1.6
|
2
|
8
|
16.9678 kg m²
|
1865.0 kg
|
CHT 355 LA2 IE3 |
LA2
|
IE3
|
2
|
280 kW
|
2960 r/min
|
903.4 Nm
|
502.2 A
|
95.8 %
|
0.84
|
96.2 %
|
94.8 %
|
2
|
2.3
|
6.5
|
3.4791 kg m²
|
1679.0 kg
|
CHT 355 LA4 IE3 |
LA4
|
IE3
|
4
|
280 kW
|
1480 r/min
|
1806.8 Nm
|
473 A
|
96 %
|
0.89
|
96.4 %
|
95.4 %
|
2
|
2.3
|
7.4
|
8.3193 kg m²
|
1530.0 kg
|
CHT 355 LB2 IE3 |
LB2
|
IE3
|
2
|
315 kW
|
2960 r/min
|
1016.3 Nm
|
558.3 A
|
95.8 %
|
0.85
|
96.2 %
|
94.8 %
|
2
|
2.3
|
6.5
|
3.8529 kg m²
|
1765.0 kg
|
CHT 355 LB2 IE4 |
LB2
|
IE4
|
2
|
315 kW
|
2980 r/min
|
1009.9 Nm
|
529.4 A
|
96.5 %
|
0.89
|
96.5 %
|
96 %
|
1.6
|
2.2
|
8.5
|
5.6041 kg m²
|
1939.0 kg
|
CHT 355 LB4 IE3 |
LB4
|
IE3
|
4
|
315 kW
|
1480 r/min
|
2032.6 Nm
|
532.1 A
|
96 %
|
0.89
|
96.3 %
|
95.5 %
|
2
|
2.3
|
7.4
|
9.3408 kg m²
|
1605.0 kg
|
CHT 355 LB4 IE4 |
LB4
|
IE4
|
4
|
315 kW
|
1485 r/min
|
2026.6 Nm
|
522.4 A
|
96.7 %
|
0.9
|
96.7 %
|
96.4 %
|
1.8
|
2.2
|
8.5
|
11.3741 kg m²
|
1686.0 kg
|
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Product Information
Reading the table
Each row is one motor of this frame size: the type letter and pole count (a 4-pole motor runs at about 1500 r/min on 50 Hz, 2-pole about 3000, 6-pole about 1000), the efficiency class, rated power, speed, rated torque, current at 400 V, efficiency and power factor. "Show starting and part-load data" adds the starting torque and current ratios (Ms/Mn, Mmax/Mn, Is/In), the rotor inertia J0 and, for IE3 / IE4 motors, the efficiency at 75 % and 50 % load.
Efficiency classes
From January 2017 the EU regulation (CE) 640/2009 requires motors of 0.75 to 375 kW with 2, 4 or 6 poles sold in the European market to be at least IE3. Nusaf supplies IE3 and above only from 0.75 kW up — IE1 motors are listed below 0.75 kW only. Efficiency figures follow IEC 60034-30 / 60034-2-1.
Fitting to a gearbox
The frame size is the IEC size the gearbox flange is specified by — a gearbox listed for "IEC 80" takes a frame 80 motor in B5 or B14. Mounting B3 (foot), B5 (flange) and B14 (face flange) dimensions are on the dimension sheets.
- Material
- Cast iron casing
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