Rosenberg high-efficiency centrifugal fans of the ERND, ERNE, and EHND series are ideal for the movement of clean or lightly dusty air, lightly aggressive gases, and steam.
They are not gastight. Allowed temperature of the ventilated medium is -30°C up to 60°C.
Casings are made of galvanized sheet steel.
Side parts and the spiral-shaped guide plate are connected with rivets.
With size 180 and 200, the motors are flanged on.
From size 225, the motors are mounted on a console.
Plastic coating is available on request.
The impellers of ERND and ERNE series with forward-curved impellers are made of galvanized sheet steel.
The plastic inlet cones are screwed into the casing. The impellers of the EHND series with backward-curved impellers are made of aluminium.
The inlet cones are made of galvanized sheet steel and are screwed into the casing.
All impellers are balanced dynamically and statically in accordance with quality level G 2,5 DIN ISO 1940 on two levels.
The position of the casing and the direction of rotation are in accordance with the EUROVENT directive.
The direction of rotation is viewed from the drive side.
When ordering, please indicate the position of the casing and direction of rotation!
Rosenberg high-efficiency centrifugal fans of the ERND, ERNE, and EHND series are ideal for the movement of clean or lightly dusty air, lightly aggressive gases, and steam.
They are not gastight. Allowed temperature of the ventilated medium is -30°C up to 60°C.
Casings are made of galvanized sheet steel.
Side parts and the spiral-shaped guide plate are connected with rivets.
With size 180 and 200, the motors are flanged on.
From size 225, the motors are mounted on a console.
Plastic coating is available on request.
The impellers of ERND and ERNE series with forward-curved impellers are made of galvanized sheet steel.
The plastic inlet cones are screwed into the casing. The impellers of the EHND series with backward-curved impellers are made of aluminium.
The inlet cones are made of galvanized sheet steel and are screwed into the casing.
All impellers are balanced dynamically and statically in accordance with quality level G 2,5 DIN ISO 1940 on two levels.
The position of the casing and the direction of rotation are in accordance with the EUROVENT directive.
The direction of rotation is viewed from the drive side.
When ordering, please indicate the position of the casing and direction of rotation!
EC (Electronically Commuted or Electronically Controlled) motors are electric motors which have permanent magnets on the rotor and use electronics to control the voltage and current applied to the motor.
EC motors have no brushes, so they avoid the sparking and short life of brushed motors. Because they have electronics controlling the stator and do not need to waste power inducing the rotor field, they give better performance and controllability and run cooler than induction motors (for small motors, at least; high horsepower 3 phase induction motors can be very efficient). EC motors are used today in many fractional-horsepower applications where high motor efficiency, reliability, and/or controllability are desired.
EC motors are very high efficiency and maintain a high efficiency level even at part speed. This means that in most cases, they use from less than one-third to one-half of the electricity needed by the traditional "shaded pole" induction motors used in the ventilation and refrigeration industries, which in turn translates into lower operating costs and short payback periods.
EC motors’ high efficiency also means that the motors run “cool” and dramatically reducethe amount of waste heat produced. Reduced waste heat at the evaporator motor level also typically results in reduced operation at the compressor level, which allows further energy savings. Further, running cooler improves the life of highly loaded motor parts like windings and bearings.
EC motors also have a wider operating range than traditional induction motors, which means that one ECM motor can replace several induction motor models. In this way, the number of models required by a typical customer is significantly decreased, which reduces and simplifies inventory. This is the main reason why ECM product lines usually include fewer motor models than their induction counterparts.
In terms of speed control and features, because the motor’s operation is controlled by software, EC motors allow customers to optimize and integrate the motor, fan, and controller with the application and to include features like data communications, constant volume control, variable speed, etc.
EC motors are also quieter than traditional inefficient motors, have longer design life, and require less maintenance.
