Delta MS300 Series User Manual page 370

 When you set Pr.06-06 or Pr.06-09 to 2 or 4, an ot1 / ot2 warning displays and the drive stops
running after over-torque detection. The drive does not run until you manually reset it.
06-12 Current Limit

Settings
 Set the maximum output current of the drive. Use Pr.11-17–11-20 to set the drive's output
current limit.
06-13
Electronic Thermal Relay Selection 1 (Motor 1)

06-27
Electronic Thermal Relay Selection 2 (Motor 2)

Settings
 Prevents self-cooled motor from overheating under low speed. Use an electronic thermal relay to
limit the drive's output power.
 Setting the parameter to 0 is suitable for an inverter motor (motor fan using an independent
power supply). For this kind of motor, there is no significant correlation between cooling capacity
and motor speed. Therefore, the action of electronic thermal relays remains stable in low speed
to ensure the load capability of the motor in low speed.
0–250% (100% corresponds to the rated current of the drive)
0: Inverter motor (with external forced cooling)
1: Standard motor (motor with fan on the shaft)
2: Disable
Chapter 12 Descriptions of Parameter SettingsMS300
361
Default: 150
Default: 2