Description
LWBE3G250-102NT-21 — EC Backward-Curved Centrifugal Fan
The LONGWELL LWBE3G250-102NT-21 is a backward-curved centrifugal fan driven by an EC external-rotor motor. Decoded from the LONGWELL type code: Ø250 mm impeller, Ø102 mm motor rotor, without housing / bracket, supply 380 VAC, three-phase winding, series number 21.
EC backward-curved fans are the standard choice for AHU, FCU, FFU, air purifiers, sterilisation and humidifier equipment, EC fan grids (fan walls) and data-centre cooling — speed is set steplessly by a 0–10 VDC or PWM signal, so the fan runs only as hard as the duty requires.
Type code — LWBE3G250-102NT-21
| LW | LONGWELL |
| B | Backward-curved impeller |
| E | EC motor |
| 3G | Three-phase winding |
| 250 | Impeller diameter Ø250 mm |
| 102 | Motor rotor diameter Ø102 mm |
| N | Without housing / bracket |
| T | Supply 380 VAC |
| 21 | Series number |
Product characteristics
| Impeller material | Glass-fibre reinforced plastic (PA6+GF / PA66) |
| Direction of rotation | Clockwise, seen on rotor |
| Protection class | IP54 / IP55 (per model) |
| Mounting position | Horizontal or vertical |
| Bearing | Maintenance-free ball bearings |
| Mode of operation | S1 (continuous) |
| Insulation class | F |
| Operating temperature | -25 °C to +60 °C |
| Control input | 0–10 VDC / PWM |
| Protection functions | Tach output, locked-rotor protection, reverse-polarity protection, over-voltage protection, soft start |
Performance data
Air volume, static pressure, input power and sound level for LWBE3G250-102NT-21 depend on the operating point you set through the 0–10 VDC / PWM input. Send us your required airflow and static pressure and our engineers will return the full duty point, the measured sound level and a dimensional drawing for this model — normally within one working day.
Typical applications
AHU (air handling units) · FCU (fan coil units) · FFU (fan filter units) · air purifiers · sterilisation equipment · humidifier equipment · EC fan grid / fan wall · ventilation units · data-centre cooling.
The Company Longwell Leading Fan and Motor Innovator Worldwide
As a leading supplier of ventilation and drive technology, LONGWELL is a highly respected engineering partner in many industries. With over than 20,000 different products, we provide the right solution for every need. And we have always worked according to the highest economic and ecological standards.
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