5 LEDs (Normal, Phase Loss, Reverse Phase, Overvoltage, Undervoltage). Installation & Wiring
High reliability in preventing phase-related equipment damage.
Nuisance tripping usually stems from voltage instability or dirty contacts, while a failure to trip suggests improper wiring. Some models offer automatic power restoration once the phase sequence is corrected. AliExpress
If the Red light is on:
: A concise summary of its electronic source protection capabilities is available via this Data Sheet .