Vacon 100 HVAC, Applications Manual

Page: 113 / 201

Select the type of the motor. You can select for example, asynchronous induction motor (IM)
or synchronous permanent magnet motor (PM).
10.1.2 MOTOR CONTROL PARAMETERS
P3.1.2.1 SWITCHING FREQUENCY (ID 601)
Use this parameter to set the switching frequency of the AC drive.
If you increase the switching frequency, the capacity of the AC drive reduces. To reduce
capacitive currents in the motor cable, when the cable is long, we recommend that you use a
low switching frequency. To reduce the motor noise, use a high switching frequency.
P3.1.2.2 MOTOR SWITCH (ID 653)
Use this parameter to enable the Motor Switch function.
You can use the Motor Switch function, if the cable that connects the motor and the drive has
a motor switch. The operation of the motor switch makes sure that the motor is isolated
from the voltage source and does not start during the servicing.
To activate the function, set the parameter P3.1.2.2 to the value Enabled. The drive stops
automatically when the motor switch is opened, and the drive starts automatically when the
motor switch is closed. The drive does not trip when you use the Motor switch function.
0 1
B
A
Fig. 12: The motor switch between the drive and the motor
A. The motor switch
B. Mains
P3.1.2.4 ZERO FREQUENCY VOLTAGE (ID 606)
Use this parameter to set the zero frequency voltage of the U/f curve.
The default value for the parameter is different for each unit size.
P3.1.2.5 MOTOR PREHEAT FUNCTION (ID 1225)
Use this parameter to enable or disable the Motor Preheat function.
The motor preheat function keeps the drive and the motor warm during the stop status by
giving the motor a DC current.
PARAMETER DESCRIPTIONS VACON · 113
24-HOUR S358 (0)201 212 575 · EMAIL: VACON@VACON.COM
10