HAMPDEN ENGINEERING CORPORATION


​sales@hampden.com

P.O. Box 563

​East Longmeadow, MA 01028

​(Toll Free) 800-253-2133 or 888-HEC-CORP

Local: 413-525-3981

​Fax: 413-525-4741​

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SFR-100 SERIES FIELD RHEOSTAT 

The Hampden Model SFR-100 consists of a chassis mounted, ten ohm, fifty watt rheostat whose terminals are brought off a DC motor. With the rheostat set for maximum resistance, a portion of the series field current is diverted through the rheostat, thereby weakening the series field strength. As the resistance of the SFR-100 is decreased, a greater portion of the series field current is diverted, resulting in a proportionately weaker series field strength.