2150RPM EC Centrifugal Fans For Roof Ventilation Fan 280MM

Speed 2150RPM EC Centrifugal Fans For Roof Ventilation Fan 280MM

Power factor correction(PFC): Passive and active(IEC61000-3-2)

Soft start, adjustable acceleration, CVT

Design operating temperature range: -30~60 degrees of minimum selection(The device in accordance with -40~85 degrees)

Protection: over voltage, over temperature, over current, phase loss detection, communication failures.

The basic interface: 0-10V/PWM, RS485/Modbus, 4-20Ma

The basic parameters of field programmable: Maximum speed, minimum speed, maximum power,

Let’s assume a laminar flow workstation requiring 13200m³/h at 450Pa. This requires 4 off Ø315 backward curved fans.

Now let us assume that this workstation operates for 50 weeks of the year and for 8 hours per day at full speed. During non working hours to

maintain the work area, the fans are run at roughly half the airflow.

AC fan 2800hrs @ 4 x 1.41kW = 5.64kW 15,792 kWh
5600hrs @ 4 x 0.62kW = 2.48kW 13,888 kWh
Total A 29,680 kWh
EC fan 2800 hrs @ 4 x 1.04kW = 4.16kW 11,648 kWh
5600 hrs @ 4 x 0.27kW = 1.08kW 6,048 kWh
Total B 17,696 kWh
A minus B 11,984kWh saved with the EC fan

aster/Slave : This system is used when several fans are used together within a single application. The main fan (Master) is individually pressure

controlled. The other fans (slaves) are then speed controlled by the Master fan : Slave Fans are always at the speed of the master fan (Rosenberg Versions only).

Safe-common necessity of company and customers

Excellent –worker and product

Efficiency-worker and produc

1. Why choose OFAN not others?

a. OFAN is a real manufacturer within 10000 sqm workshop for fans R&D, production.
b.The best engineer team in China, chief engineer was trained in Japan.
c.The best electric components imported from world top three suppliers.
d.OEM production available.

2. How about delivery time?

a. Sample order below 10 pieces, we could make dispatch within 10 days.
b. Within four production lines we could supply 1000 fans each day.

3. What kind of payments do you support?

T/T, L/C, other kind of payment please contact with us

4. What's the MOQ?

1 piece sample fan. We believe our fan quality must satisfy customer.