Intermittent periodic duties

Intermittent periodic duty with start and brake (S5) 3/52... 

Intermittent periodic duty with start (S4) This is a sequence of identical duly cycles, each consisting... 

Figure 3.5 Intermittent periodic duty with starting and braking, S5...

Continuous duty with intermittent periodic loading (S )... 

ManuEictuFen of motors classify them accoidii to the amount of time the motor needs to be operated. The motors are generally classified as continuous duty or intermittent duty. The continuous du motors are used in applications where the motor is ejqpected to operate over a period of an hour or longer. In some applications, continuous operation of the motor may be requited. In applications where the motor is expected to operate fi>r short periods of time and then rest, the intermittent duty motors are fiiund. The continuous duty motors are mote expensive than the intermittent duty motors. 

Instead of maintaining a record of duty status, the driver must maintain for a period of 6 months, time records which include the time the driver reports for and is released from duty each day and the total number of hours the driver is on duty each day. The total time on duty for the preceding 7 days must also be maintained for drivers used for the first time or intermittently. 

Duty Specific controller functions. Continuous constant load, indefinitely long time period. Short time constant load, short or specified time period. Intermittent varying load, alternate intervals, specified time periods. Periodic intermittent duty with recurring load conditions. Varying varying loads, varying time intervals, wide variations. 

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