BESB box fan
BESB box fans have their motor connected directly to the fan impeller.
BESB box fans are available with three types of motor:
- EC motor
- Single-phase AC motor
- 3-phase AC motor
The motors are made to protection class IP54 and all materials are as a minimum class F (155 °C). All motor types have integral current overload protection.
EC motor
The EC motor for BESB is a permanent-magnet motor of class IE5 with motor control for 1 x 230 V or 3 x 400 V connection. The motor control and the motor are protected from overloading, blocking, over and under voltage, and over heating.
The motor control is factory programmed by EXHAUSTO for optimal operation of the fan. It only requires mains connection and a control signal from an EXHAUSTO EFC1P or MAC12 controller or a 0-10V signal.
The motor controls also provide a Modbus interface for fan control and alarm read-offs etc.
Single-phase and 3-phase AC motor:
Single-phase AC motors can be selected for BESB250. All motors are 4-pole with 1400 rpm, and permit direct voltage control using EXHAUSTO controllers EFC16, EFC35 and MAC12 (with MPR4 or MPR8 module).
3-phase motors can be selected for BESB500. The motor is designed for a fixed rpm of 1400 or for frequency control (max. 50 Hz) by external frequency converter. The 3-phase motors must use external motor protection, or they can be controlled by an external frequency converter (with integral motor protection) to max. 50 Hz.