FAQ - Multifan (Motor - electrical)

Frequently asked questions

Why are Multifan motors not dual voltage? »»

Originally they were developed for obtaining high efficiency in the single phase supply. In the existing winding it is therefore not possible to apply. On request Vostermans Ventilation has the ability to produce dual voltage motors.

Why uses Multifan only one non-starting capacitor? »»

To run a single phase motor a capacitor is needed. For motors with a high starting torque moment another capacitor is needed. Due to the smooth start and run of the direct driven Multifan and to reduce unnecessary costs, only 1 capacitor is needed.

Do you need different motors for different voltages? »»

Basically yes, since the motor is controllable, causing different heat exchanges within the motor, the windings or other parts, each motor needs to be adapted for each voltagelevel.

VOLTAGE: What range of voltages will Vostermans Ventilation motors handle? »»

Generally, Vostermans Ventilation motors are available in single phase versions from 100V to 240V. Three phase motors are available in ranges from 208V to 460V.

If the three phase motor can handle a wide range of voltage, why are there so many fan part numbers for the high and low ranges? »»

Vostermans Ventilation 3 phase motors are designed to handle a wide range. In most cases, the same motor can handle ranges from +6% to -10%. However, this depends on the specific fan size under consideration. The governing criteria is the temperature buildup in the motor, and that range is confirmed by Vostermans Ventilation testing. Since each motor/impeller combination is unique, different part numbers are created for each combination.

What is the impact on airflow when operating at the low end of each voltage range? »»

There will be a small reduction in airflow due to slight decrease in motor rpm.

Are Vostermans Ventilation single phase motors dual voltage capable, that is, 120V/240V? »»

No, most are not. There are a couple in the product offering. Dual voltage motors are actually less efficient.

FREQUENCY: What is the acceptable electricity frequency range? »»

Vostermans Ventilation offers motors in either 50Hz or 60Hz. It is assumed that all motors sold in the U.S. will be 60Hz, so if 50Hz is required, it must be specified at the time of quotation.

Vostermans Companies is not responsible for inaccurate or incomplete data. In case of any questions and/or remarks please contact .