Motor Protection; Motor Overload Detection - YASKAWA VS-606V7 Series Instruction Manual

Motor Protection

Motor overload detection

The VS-606V7 protects against motor overload with a built-in electronic
thermal overload relay.
• Motor rated current (elctronic thermal reference current, n036)
Set to the rated current value shown on the motor nameplate.
Note : Setting to 0.0A disables the motor overload protective function.
• Motor overload protection selection (n037, n038)
n037 Setting
0 Applied to general-purpose motor
1 Applied to inverter motor
2 Electronic thermal overload protection not provided
Constants
No.
Electronic thermal motor
n038
protection time constant setting
The electronic thermal overload function monitors motor temperature, based
on inverter output current and time, to protect the motor from overheating.
When electronic thermal overload relay is enabled, an "OL1" error
occurs, shutting OFF the inverter output and preventing excessive
overheating in the motor. When operating with one inverter connected to
one motor, an external thermal relay is not needed. When operating several
motors with one inverter, install a thermal relay on each motor.
Electronic Thermal Characteristics
Name
1min
Unit Setting Range
1 to 60min
Initial Setting
8min
87