vkm ec erp 2018 8005 Inline centrifugal fan with the air flow up to 1230 m³/h in steel casing. EC-motors, high level of efficiency 100% speed controllable EC technology is intelligent technology; using integral electronic control which eliminates the slip losses in the motor and ensures that the motor always runs at optimal load. This guarantees that the proportion of energy utilized effectively is many times higher and the energy usage considerably lower compared with AC motors. EC fans are notable for their economical use of energy and excellent ease of control. They can be varied in speed to match the airflow demand, and operate at high efficiency levels. For the same air volume, they consume distinctly less energy than AC fan drives. Another special feature of EC fans is their energy-saving potential not only at full load, but especially at part-load. When operating at part-load, the energy used is much lower than with an asynchronous motor of equivalent output. Reduced energy usage guarantees a drop in operating costs.

VKM 250 EC

Inline centrifugal fan with the air flow up to 1230 m³/h in steel casing.
  • EC-motors, high level of efficiency
  • 100% speed controllable

EC technology is intelligent technology; using integral electronic control which eliminates the slip losses in the motor and ensures that the motor always runs at optimal load.

This guarantees that the proportion of energy utilized effectively is many times higher and the energy usage considerably lower compared with AC motors.

EC fans are notable for their economical use of energy and excellent ease of control. They can be varied in speed to match the airflow demand, and operate at high efficiency levels. For the same air volume, they consume distinctly less energy than AC fan drives.

Another special feature of EC fans is their energy-saving potential not only at full load, but especially at part-load. When operating at part-load, the energy used is much lower than with an asynchronous motor of equivalent output.

Reduced energy usage guarantees a drop in operating costs.

Category

Description

APPLICATION

  • Supply and exhaust ventilation systems for commercial, office and other public or industrial premises.
  • EC motors applied in VKM fans reduce energy demand by about 35 % and ensure high aerodynamic performance and low noise level.
  • Such characteristics are of special importance for ventilation of public premises as banks, supermarkets, restaurants, hotels, installation close to residential buildings and for domestic application, e.g. ventilation of private pools.
  • EC motors enable integration of several fans into a unified networks and their centralized control.
  • The steel casing ensures reliable operation of the fan in case of its outside installation.
  • The fan are designed for connection to Ø 250 mm air ducts.

DESIGN

  • The fan casing is made of polymer coated steel.
  • New technologies for manufacture of the fan components let attain the total casing air tightness.

MOTOR

  • The impellers with backward curved blades are powered with a high efficient electronically commutated (EC) direct current motor with external rotor.
  • As of today, such motor type is the most advanced solution for energy saving.
  • EC motors are featured by high performance and the best speed controllable range.
  • Premium efficiency reaching up to 90 % is the absolute advantage of electronically commutated motors.
  • The motors are equipped with ball bearings for longer service life of the fan (40 000 hours).
  • For precise features, safe operation and low noise, each turbine is dynamically balanced while assembly.
  • Motor ingress protection rating IP44.

SPEED CONTROL

  • The fan is controlled with the external control signal 0-10 V (air flow control as a function of temperature, pressure, smoke conditions and other parameters).
  • Should the control value get changed, the EC motor adjusts its speed and the fan boosts as much air flow to the ventilation system as required.
  • Maximum speed of the fan does not depend on the current frequency and it can operate at 50 or 60 Hz mains supply.
  • The fans may be integrated into the unified dispatch system.
  • The respective software enables to control all the fan integrated into the system.
  • The computer displays all the system parameters.
  • Each fan in the system may be individually adjusted.

MOUNTING

  • The fans may be installed at any angle.
  • The fixing brackets that are included into the delivery set are used to facilitate the fan mounting to the wall.
  • The fan is connected to power mains through the external terminal box.

Characteristics

Parameter VKM 250 EC Measurement unit
Low-powered motor no –
High-power version no –
Phase 1 ˜
Voltage 230 V
Frequency 50/60 Hz
Sound pressure level at 3 m distance 46 dBА
Air capacity 1230 m³/h
Power consumption 164 W
Current 1.15 A
EC motor yes –
RPM 2900 min-1
Max. transported air temperature -25 +60 °С
Protection rating IP X4 –
Duct diameter 250 mm
Weight 5.1 kg
Design centrifugal –
Casing material polymer coated steel –
Outdoor mounting yes –
SEC Class – –
Duct for round air ducts –
Type supply and exhaust –
Mounting outdoor mounting, Inline –

Additional characteristics

Sound-power level, A – weighted Octave frequency band [Hz] LpA, 3 m [dBА] LpA, 1 m [dBА]
Hz Gen. 63 125 250 500 1000 2000 4000 8000
LwA to inlet dBА 90 61 77 85 83 84 81 76 65 69 79
LwA to outlet dBА 89 65 77 74 83 85 83 78 64 69 79
LwA to environment dBА 67 29 48 57 60 63 59 51 37 46 56

Dimensions

Parameter Value Measurement unit
∅D 248 mm
ØD1 345 mm
B 395 mm
B1 355 mm
H 435 mm
L 250 mm
L1 25 mm
L2 30 mm
L3 40 mm

vkm ec dimensions 2502 Inline centrifugal fan with the air flow up to 1230 m³/h in steel casing. EC-motors, high level of efficiency 100% speed controllable EC technology is intelligent technology; using integral electronic control which eliminates the slip losses in the motor and ensures that the motor always runs at optimal load. This guarantees that the proportion of energy utilized effectively is many times higher and the energy usage considerably lower compared with AC motors. EC fans are notable for their economical use of energy and excellent ease of control. They can be varied in speed to match the airflow demand, and operate at high efficiency levels. For the same air volume, they consume distinctly less energy than AC fan drives. Another special feature of EC fans is their energy-saving potential not only at full load, but especially at part-load. When operating at part-load, the energy used is much lower than with an asynchronous motor of equivalent output. Reduced energy usage guarantees a drop in operating costs.

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  • VKM 125 EC

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