Helios Fans SKRD EC 500÷80÷50 B

The Helios SKRD EC 500÷80÷50 B is a rectangular EC centrifugal fan engineered for inline installation in rectangular duct systems. The compact casing is constructed from galvanised steel, flanged on both ends, and acoustically lined with a 50 mm thick mineral fibreboard for optimal sound insulation. The fan allows easy servicing and cleaning with its swing-out motor and impeller unit.

Equipped with a high-performance centrifugal impeller featuring backward curved aluminium blades, it guarantees vibration-free operation through dynamic balancing and aerodynamic optimisation, with inflow managed via a nozzle.

This fan is driven by an energy-efficient, speed-controlled EC external rotor motor offering IP44 protection and peak efficiency. The motor is maintenance-free, ball bearing mounted, and designed to be radio interference-free. It includes integrated electronic temperature monitoring for the motor and electronics. Standard speed control is provided via an internal potentiometer allowing stepless adjustment between minimum and maximum speeds. Additional stepless speed control is achievable using an external potentiometer or the universal EUR-EC control system. The electrical connection is made through a standard terminal box (IP54) mounted on an extended cable.