L&t Dol Control Panel: Three Phase Submersible Pump Rating Up To 6hp, With Single Phase Preventer 3phase 415v / 360v 50hz Ms Body, Dol Starters Are Basic Electrical Starters With Contactors And Relay For On/off Operation And Overload Protection Of The Pump Set. Application: Three-phase Motor And Submersible Pump Over And Above The On/off Operation And Overload Protection Features Equipped In Controllers, It Also Provides Additional Features Like Auto On, Indications Of Supply On/off And Pumps On/off, Reading Of Real-time Voltage & Current Of The Pump With Unique Dual Analogue Meter. Single Phasing Protection Relay (Sppr) Inside The Controller Unit Provides The Advanced Protection Features Viz. Single-phasing Prevention, Phase-reversal Protection, Phase-unbalance Protection, Variable Time-delay Adjustment For The Delayed Operation Of Pump Set