power distribution - Siemens

Reduced Size TransformersThree PhaseSentron Reduced Size Plus(RSP)The “Sentron Reduced Size Plus” is idealfor locations with limited equipmentspace. This product is specificallydesigned for easier installation withsufficiently sized bus and all aroundaccess for cable entry from bottom,lower back or sides. The rodent proofgrillwork at the bottom slides up forinsertion of forks or pallet jack for easypositioning. The RSP has 3-phaseshunt-trip activated disconnect installedon the primary side and a safety alarmfeature which operates automatically ifthe coils overheat due to severe load orin case of failure as life expectancy isreached. The “RSP” is a dry typetransformer with fan assisted coolingactivated by thermal sensors only whenneeded for peak periods and heavyloading. The RSP system incorporatesdry contacts to indicate 3 differenttemperature levels for customersSelectionwishing to monitor the transformerremotely. Audible noise insulationbarriers are factory installed inside ofthe enclosure for quieter operation foraverage applications. The “SentronReduced Size Plus” is available withcopper or aluminum windings in 150C,115C or 80C rise as well as K-Factor,electrostatic shielding and TP1 efficiencyratings.Features:▪ Approximately 30% smaller and 40%lighter▪ Built to NEMA ST-20 standards, IEEEC57 and UL Listed▪ 3-phase disconnect switch factoryinstalled on primary. Protection fromoverheating with shunt trip device.▪ Easy connection to LV lug landing pads▪ Lugs provided on disconnect for HVconnections to disconnect▪ Cable entrance from lower back, sidesor bottom▪ Quiet operation for averageapplications; 2 dB below NEMA std.▪ Thermal switches activate (Fans)@125˚C, (Alarm) @190˚C and(Disconnect) @200˚C.▪ Greater efficiency than standard models▪ Dry contacts for remote monitoringconnections▪ Same distance to wall as standardunits▪ Front access for easy maintenance▪ Enclosure is rodent proof by design▪ Audible safety alarm to signaloverheating▪ NEMA 3R with weather shields added▪ Energy efficient NEMA-TP1 designs7 TRANSFORMERSSizes Available:150-1000 KVA.SMALLERLIGHTERQUIETERENERGY EFFICIENTSiemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog 7-17