SSRs, at least to my knowledge, can not be throttled. It is either off or on.
Correct, I don't think I sad it that way.
I was only talking about PID output and lamarguy
Like I sad from the beginning it depends all on the parameter settings how a connected devices will behave.
Long cycle time and large duty cycle sure is better for a compressor.
For example 2 seconds on and 2 seconds off could be considered 50%.
Same applies to 10 seconds.
The PID output is a PWM signal (for my units), the average voltage is what my load sees for the given duty cycle.
Low effective voltage can be damaging to pumps, compressors if driven directly.
If 120 V is required and the effective voltage is 70 V for non resistive devices,
like motors, etc., can create starting problems or even excess heat.
If you have the equipment you can measure the effective voltage at the load.
The cycle time we can program (not the same as duty cycle) is the time the controller can use to make adjustments to the required duty cycle.
The duty cycle On & OFF time has to equal the cycle time.
If we set the cycle time to 5 seconds and the controller calls for 20% duty cycle, the output will be ON for 1 sec and off for 4 sec.
If we set the cycle time now to 50 seconds the output will be on 10 sec and off for 40 sec, it is a lot better for my load device.
40 second at 100% operating voltage.
Imagine a motor, pump, etc. to run for 1 sec and coasting for 4 sec and starting all over for a long period of time at a 20% duty cycle.
I hope we are talking about the same thing.