... 2000 2,easy to use ,fast to reaction. 3,with 5 years exporting experience LR2-D13/23/33. series thermal relay ... 50Hz or 60Hz, rated insulation voltage 660V, rated current 0.1-93A for protecting the phase break when the electric motor is ... frequency 50-60Hz;Use group, rated working voltage, appoint thermal current and rated current. intelligent high voltage motor phase advancer Electric motor protector