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No , it is not a dual sw . It is a simple ON/OFF pressure sw.

A pressure sw has an ON [ cut-in] spec and an OFF [ cut-out] spec.
Do you think the sw can turn on/off at one pressure??

So , when you get to to a dangerous high pressure , the sw closes [ cuts in] and the now activated fan airflow brings that dangerous pressure back down..when the pressure gets down far enough that the fan is no longer needed , the sw opens [ cuts out] relieving the fan of it's duties . In other words , that cycle is over..sw cut in until pressure dropped , at which time it cut out..
If your sw did not have a cut-out spec , then once it was triggered, it would run forever, see?????????
Once the car is traveling, the presures in the condenser drops b/c you have a good airflow from car movement, at which time the high pressure sw opens and disconnects the no longer needed aux fan circuit...but stop at a light/traffic jam for a few minutes and guess what happens.????.......yup, high side pressure rise from no airflow and a new fan cycle begins.... you get it now.
This confusion comes from the fact that cheaper cars with small condensers are designed with a fan on all the time the a/c is on, just cuz they are maxed out..not the case on this design.