What are the starting currents of Valpes actuators (EN 60 898)?
When it starts, an asynchronous motor generates a current peak, named starting current or inrush current due to the conductive material of the rotor cage, immediately shortcircuited.
The principle is: that a low rotor speed generates a high current consumption because of the lack of counter-electromotive force.
When the motor turns at its nominal speed, it emits electric pulses, which prevent over-consumption.
Valpes actuators generate a starting current during some milliseconds. That is why we recommend a D curve circuit breaker.
Which voltage range is tolerated by a 3-phase 400V VR or VS actuator?
The 3-phase 400V VR and VS can operate with a 50 or 60Hz current and tolerate a voltage of up to 480V.
These values refer to maximum voltages, respecting a using at nominal torque and S4-50% duty cycle (see the topic in this FAQ). Beyond this voltage, it will be impossible to maintain the thermal balance and to prevent an irretrievable motor breakdown.
Which voltage range is tolerated by a 3-phase 400V VT actuator?
The 3-phase 400V VT can only operate with a 50Hz current and tolerate a voltage of up to 440V.
These values refer to maximum voltages, respecting a using at nominal torque and S4-50% duty cycle (see the topic in this FAQ). Beyond this voltage, it will be impossible to maintain the thermal balance and to prevent an irretrievable motor breakdown.
