Dear Mr NickParker
Introduction: This compressor has a part winding motor (PW)
.....The time delay between PW1 and PW2 must not exceed 0,5 second....
....You can set the short time settings at 1s.
.... I wonder, is it possible to accelerate within 1s.
Q1. The time delay between PW1 and PW2 must not exceed 0,5 second....
A1. This time delay [ " must not exceed 0,5s "] refers to the [transitional switching time] i.e. the switching time transferring [at the end of the low-speed over to the high-speed]. It is [not] the time (from the starting of low-speed) up to the time of transfer to high-speed.
If the [transitional switching time] is too long, the speed will drop. It would create a (bigger speed difference) when transferred to high-speed, which may not be favorable to the load/mechanical parts etc.
FYI: 1. The time it takes [from stand-still to full low-speed] is dependent on the difference between the motor low-speed torque and the low-speed low torque. e.g 5...10s etc.
2. Transfer from (low-speed to high-speed) should take place when the low-speed current "flats" out i.e. when the motor low-speed torque = low-speed load torque.
3. [transitional switching time] from (end of low-speed to the high-speed) should [not] exceed 0.5s .
4. The time it takes from [beginning of high-speed to full high-speed] is dependent on the difference between the [motor high-speed torque and the high-speed load torque]. e.g. 5...20s etc
Che Kuan Yau (Singapore)