A. Locked-rotor requirements
1. Locked-rotor cold current: the instantaneous current when the motor is turned on.
2. Locked-rotor thermal current: the current at the end of the first cycle test. Usually 10 to 30 seconds after the motor is turned on for the first time.
3. In the above test, the elapsed time when the motor winding temperature rises from room temperature to near the allowable temperature of the UL motor insulation class. For example: For a class A motor, it takes 12.5 seconds to go from 25°C to 175°C.
4. Ambient temperature (°C) during the test: room temperature (usually 25°C).
B. Overload operation requirements
1. Load current: When the motor is running, the load on the motor will increase slightly until the temperature of the motor winding is completely stabilized at about 10°C below the maximum allowable temperature of the UL motor class. For example, for a class A motor, the maximum allowable temperature is 140°C, and the motor winding temperature is at 130°C when the motor winding temperature is completely stable. Record the current loss at this time.
2. Protector position temperature: the temperature measured under the above load conditions when the motor is running.
3. Ambient temperature: room temperature (usually 25°C).
C. Abnormal protection conditions
1. Maximum/minimum ambient temperature: the temperature around the protector.
2. Highest/lowest line voltage: the highest and lowest voltage under the premise of effective protection.
3. Other environmental factors: For example, exposure to agricultural climate conditions.
D nameplate data
3. Single phase
4.FLA (full load current)
5.LRA (locked-rotor current)
6. Insulation class (UL/CSA) (specify a class)