Soft start 16A.

The circuit is mainly used to suppress current peaks when switching on the appliance, which has a low input resistance after connecting the 100-240V AC/16A max network, which causes the circuit breaker to disconnect or break the fuse, e.g. for transformers, in a switch-mode power supply,  in an industrial inverter, high peak to charge a smoothing capacitor, AC-DC power module, inductive (pumps, compressors, saw, fan, PC, UPS, UPC... single-phase motors-may have a smooth start effect, but depending on its load, it may not be visible. Caution does not replace the frequency converter!) and resistive load.

The principle is that the thermistors NTC-Inrush Current Limiting, are connected in parallel to the output = loads, which suppress overcurrent at switch-on, which themselves reduce their internal resistance after two seconds.

Soft has 6xNTC and their resistance is 2.7R, or after disconnecting the jumper it will have a resistance of 5.3R on 3xNTC (for coppressor etc)

After connection, the green LED3 turns on = 5V is ok. After 2 seconds, the yellow LED2 = zero-switched triac is connected to the NTC output and after a set time of 2s-5s with the R15 trimmer, the relay that switches on NTC = full power is switched on. (this will prevent unnecessary overheating of the NTC)

The circuit and connection of the appliance is protected by 3xVDR surge protection.

When setting in practice, it is necessary to first set the min / max time and then pull out the jumper.

In the event of a soft start fault, the service module is ready for replacement.