SJR3-2000 series Description of protection function
SJR3 series soft starter has perfect protection function to protect the soft starter and motor use safety, in the use, should be according to the different situation proper setting of the protection level and protection parameters.
Overheating protection for soft starter: The protection will be activated when the temperature rises to 80℃±5℃, and the overheating protection will be lifted when the temperature drops to 55℃ (minimum).
Input phase loss protection hysteresis time: < 3 sec.
Output phase loss protection lag time: < 3 sec.
Three-phase unbalance protection lag time: < 3 sec. The deviation of each phase current is 50%±10% as the benchmark, when the load current is lower than 30% of the nominal rated value of the soft starter, the judgment benchmark deviation will be increased.