The "SF" in the motor label stands for "Service Factor", which refers to the additional load capacity that the motor can withstand under rated load. It is one of the design parameters of the motor and usually takes a value between 1.0 and 1.5. During the operation of the motor, if the load exceeds the rated load, the motor can temporarily bear a certain additional load to ensure normal operation. For example, if the rated power of the motor is 10 kW and the SF is 1.2, the motor can withstand a load of 12 kW for a short period of time. In this question, SF=269A means that the motor can handle an additional load of 269 amps at rated load.