https://www.engineeringtoolbox.com/iec-duty-cucles-d_739.html

The eight - S1 - S8 - IEC duty cycles of operating electrical motors.

https://electrical-engineering-portal.com/10-duty-types-three-phase-asynchronous-motors

Dec 11, 2017 ... For a motor suitable to this duty type, the rating at which the machine may be operated for an unlimited period is specified. This class of rating ...

https://www.electrical4u.com/motor-duty-class/

Jul 30, 2018 ... Depending on this, concept of motor duty class is introduced and on the basis of this duty cycles of the motor can be divided in eight categories ...

https://myelectrical.com/notes/entryid/106/understanding-motor-duty-rating

Dec 12, 2011 ... One of the comments on my Motor Starting Series was asking for something on duty cycles. Here it is. As a purchaser of a motor, you have ...

http://www.eeeguide.com/classes-of-motor-duty-in-electrical-drives/

IS: 4722-1968 categorises various load time variations encountered in practice into eight standard Classes of Motor Duty in Electrical Drives.

https://www.slideshare.net/pmanjukarthick/classes-of-motor-duty

Aug 4, 2018 ... Classes of motor duty. 1. ED&C – MOTOR DUTY presentationpresentation BY P. KARTHIKEYAN/AP/EEE/KEC CLASSES OF MOTOR DUTY ...

https://www.brainkart.com/article/Classes-of-Motor-Duty_12678/

Apr 28, 2017 ... CLASSES OF MOTOR DUTY. various load time variations encountered into eight classes as. i. continuous duty. ii. short time duty.

https://www.groschopp.com/duty-cycle-need-know/

Aug 4, 2016 ... During the hunt for an electric motor for a particular application, duty cycle is routinely brought up as an important factor in determining your ...

http://www.electricalengineering-book.com/pdf/chapter-865728.pdf

(S5) 3/66. 3.3.5 Continuous duty with intermittent periodic loading. (S6) 3/67 ...... 130∞C. If the motor is of insulation class B and ambient temperature at 50∞C ...

http://www.drivesandautomation.co.uk/useful-information/electric-motor-duty-cycles/

IEC (the International Electrotechnical Commission) uses eight duty cycle ... S1, Continuous duty, The motor works at a constant load for enough time to reach ...