supply of a 3-phase dual (or duplex) starter rated at 25 s is a control panel designed to operateand protect two separate 3-phase , a 3-phase dual (or duplex) starter rated at 25 amps is a control panel designed to operate an d protect two separate 3-phase motors (or a single motor using two operating modes). these starters gene rally feature heavy-duty 25a contactors and adjustable thermal overload relays (typically 15-25a) to preve nt damage from overcurrent. provides reliable single and dual direct-on-line (dol) starters with adjustable overload ranges. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]