CHT 280 Cast Iron Three-Phase Motor 6-Pole (45–55 kW)
CHT 280 cast iron three-phase motor, 6-pole (about 1000 r/min at 50 Hz) — Chiaravalli's IEC frame 280 cast iron motors in the IE3 / IE4 efficiency classes, 45–55 kW. Cast iron casing, IP54, class F insulation, IC411 fan cooling, Δ/Y 400/690 V 50 Hz. Mounting B3 (foot), B5 (flange) or B35 (foot and flange): pick it in the table's Mounting filter; the dimension sheets give the frame 280 mounting dimensions per efficiency class.
How to pick from the table: choose the power, the efficiency class — IE3 or IE4 (we supply IE3 and above only from 0.75 kW up; IE4 where the energy saving pays) — and the mounting. 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. The table opens on the B3 mounting — switch the filter for B5 or B35.
| Code | Mounting | Type | Efficiency class | 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 280 S6 IE3 B3 |
B3
|
S
|
IE3
|
45 kW
|
980 r/min
|
438.5 Nm
|
83.5 A
|
93.7 %
|
0.83
|
94.6 %
|
92.7 %
|
2.5
|
2.8
|
8.9
|
2.2027 kg m²
|
478.0 kg
|
CHT 280 S6 IE4 B3 |
B3
|
S
|
IE4
|
45 kW
|
985 r/min
|
436.5 Nm
|
82.5 A
|
94.8 %
|
0.83
|
95 %
|
94.7 %
|
2
|
2
|
8.5
|
2.3357 kg m²
|
503.0 kg
|
CHT 280 M6 IE3 B3 |
B3
|
M
|
IE3
|
55 kW
|
980 r/min
|
536 Nm
|
99.3 A
|
94.1 %
|
0.85
|
95 %
|
93.4 %
|
2.5
|
2.8
|
9.2
|
2.573 kg m²
|
543.0 kg
|
CHT 280 M6 IE4 B3 |
B3
|
M
|
IE4
|
55 kW
|
985 r/min
|
533.5 Nm
|
99.4 A
|
95.1 %
|
0.84
|
95.3 %
|
95 %
|
2
|
2
|
8.5
|
2.7027 kg m²
|
572.0 kg
|
CHT 280 S6 IE3 B5 |
B5
|
S
|
IE3
|
45 kW
|
980 r/min
|
438.5 Nm
|
83.5 A
|
93.7 %
|
0.83
|
94.6 %
|
92.7 %
|
2.5
|
2.8
|
8.9
|
2.2027 kg m²
|
478.0 kg
|
CHT 280 S6 IE4 B5 |
B5
|
S
|
IE4
|
45 kW
|
985 r/min
|
436.5 Nm
|
82.5 A
|
94.8 %
|
0.83
|
95 %
|
94.7 %
|
2
|
2
|
8.5
|
2.3357 kg m²
|
503.0 kg
|
CHT 280 M6 IE3 B5 |
B5
|
M
|
IE3
|
55 kW
|
980 r/min
|
536 Nm
|
99.3 A
|
94.1 %
|
0.85
|
95 %
|
93.4 %
|
2.5
|
2.8
|
9.2
|
2.573 kg m²
|
543.0 kg
|
CHT 280 M6 IE4 B5 |
B5
|
M
|
IE4
|
55 kW
|
985 r/min
|
533.5 Nm
|
99.4 A
|
95.1 %
|
0.84
|
95.3 %
|
95 %
|
2
|
2
|
8.5
|
2.7027 kg m²
|
572.0 kg
|
CHT 280 S6 IE3 B35 |
B35
|
S
|
IE3
|
45 kW
|
980 r/min
|
438.5 Nm
|
83.5 A
|
93.7 %
|
0.83
|
94.6 %
|
92.7 %
|
2.5
|
2.8
|
8.9
|
2.2027 kg m²
|
478.0 kg
|
CHT 280 S6 IE4 B35 |
B35
|
S
|
IE4
|
45 kW
|
985 r/min
|
436.5 Nm
|
82.5 A
|
94.8 %
|
0.83
|
95 %
|
94.7 %
|
2
|
2
|
8.5
|
2.3357 kg m²
|
503.0 kg
|
CHT 280 M6 IE3 B35 |
B35
|
M
|
IE3
|
55 kW
|
980 r/min
|
536 Nm
|
99.3 A
|
94.1 %
|
0.85
|
95 %
|
93.4 %
|
2.5
|
2.8
|
9.2
|
2.573 kg m²
|
543.0 kg
|
CHT 280 M6 IE4 B35 |
B35
|
M
|
IE4
|
55 kW
|
985 r/min
|
533.5 Nm
|
99.4 A
|
95.1 %
|
0.84
|
95.3 %
|
95 %
|
2
|
2
|
8.5
|
2.7027 kg m²
|
572.0 kg
|
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Product Information
Reading the table
Every row is one motor of this frame and pole count: the mounting, the type letter (the catalogue's length code), 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.
Mounting
The table opens on B3 (foot). Switch the Mounting filter to B5 (flange) or B35 (foot and flange); the electrical data is the same, the mounting dimensions are on the dimension sheets per efficiency class.
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.
- Material
- Cast iron casing
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