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

S3, Intermittent periodic duty, Sequential, identical run and rest cycles with constant load. Temperature equilibrium is never reached. Starting current has little ...

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

Dec 11, 2017 ... The term duty defines the load cycle to which the machine is subjected, ... Intermittent periodic duty (Type S3); Intermittent periodic duty with ...

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

Dec 12, 2011 ... S3, Intermittent periodic duty, Series of identical duty cycles each a constant load for a period, followed by a rest period. Thermal equilibrium is ...

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://c03.apogee.net/contentplayer/?coursetype=md&utilityid=elpaso&id=12601

S3 - Intermittent Periodic Duty. Sequential, identical run, and rest cycles with constant load. Temperature equilibrium is NEVER reached. Starting current has ...

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

3.1 Duty cycles 3/65. 3.2 Continuous duty (CMR) (S1) 3/65. 3.3 Periodic duties 3/ 65. 3.3.1 Short-time duty (S2) 3/65. 3.3.2 Intermittent periodic duty (S3) 3/65.

https://www.bernardcontrols.com/en/our-solutions/our-technologies/motor-duty-cycle

The IEC 60034 standard defines the electric motors' standard duty cycles. According to this standard, S2 duty rating is short time duty: motors using this duty  ...

https://en.wikipedia.org/wiki/Duty_cycle

A duty cycle or power cycle is the fraction of one period in which a signal or system is active. Duty cycle is commonly expressed as a percentage or a ratio.

https://www.quora.com/How-can-we-use-S2-duty-cycle-motors-instead-of-S3-duty-cycle-motors-and-vice-versa

Hi, * S2 Duty cycle motors have short time duty, they are designed to operate at a load for a time not sufficient to reach thermal equilibrium, ...

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

S3, Intermittent periodic duty, Sequential, identical run and rest cycles with constant load. Temperature equilibrium is never reached. Starting current has little ...