overview MLGQ series self-resetting overvoltage and undervoltage time-delay protectors are widely used in lighting power distribution systems. It has the advantages of beautiful and compact appearancelight weight, excellent and reliable performance and quick tripping. Its track installation, shell and parts are made ofhigh flame-retardant and impact-resistant plastics,and its service life is long. Mainly used for AC 230V, line overload,overvoltage,undervoltage protection.