GKM-02F Phase Sequence, Under / Over Voltage Control Monitoring Relay low 260V-370V high 400V-510V delay 0.1-20s reset 0.1-20s With Neutral Manual
GKT-03F Phase Sequence, Under / Over Voltage Control Monitoring Relay low 260V-370V high 400V-510V delay 0.1-20s reset 0.1-20s Manual
GKV-12F Phase Sequence, Under / Over Voltage Control Monitoring Relay low 140V-210V high 230V-300V delay 0.1-20s reset 0.1-20s With Neutral Manual