A rheostat is a variable resistor which is used to control current within an electrical circuit. They are able to vary the resistance in a circuit without interruption. Rheostats are very similar in construction to potentiometers. How Rheostats Operate Rheostats use two connections, even when 3 terminals are present, the first connection is made to one end of the resistive element and the other connection to the wiper (sliding contact). Resistive wire is wound around an insulating ceramic core, as the wiper slides over the windings the resistance, and therefore current, produced is altered. Rheostat Types Several types of rheostats exist, with varying functions and applications. Rotary type – Mostly used in power control applications. Rotary rheostats feature a turnable shaft that adjusts the resistance. They are used to control multiple applications in parallel or to increase the power rating or adjusting range. Slide type – Slide rheostats are often used for education and in laboratory environments. Linear or slide types are constructed of resistive wire wound on an insulating cylinder, a sliding contact moves along the winding to increase or decrease the resistance.
Description:
Ohmite RE Series wirewound potentiometers are designed and
manufactured to operate smoothly and reliably over long periods of use. The RE Series has a ceramic body, high-grade resistance alloy linear taper windings, vitreous enamel coating, metal spring contact arm, metal graphite composition and solder coated terminals. Typical applications for the ...
Description:
The Vishay RT Series of linear wire wound
rheostats are designed for use in professional and industrial equipment. Particularly in equipment where transients, repeated overloads, impacts and vibrations characterise everyday operation.Suggested accessories for these rheostats include control buttons and displays. Vitreous enamel construction provides exceptional reliabilityLinear wire wound trackCompact size ...
Description:
Ohmite RC Series wirewound potentiometers are designed and
manufactured to operate smoothly and reliably over long periods of use. The RC Series has a ceramic body, high-grade resistance alloy linear taper windings, silicone-ceramic coating, metal spring contact arm, metal graphite composition and solder coated terminals. Typical applications for the RC ...