Toroidal rheostats and potentiometer model TS TP

These rheostats consist of a toroid-shaped ring, wound with resistive wire and fixed with vitreous enamel to a disc-shaped ceramic support. The vitreous lining covers the entire toroid, except for a contact track with a sliding cursor.
In the TP version the lining is fixed with ceramic cement.

Maximum Temperature: For normal use, it is advisable not to exceed 340° C, measured at the hottest point.

Temperature coefficient: Normally less than 70 ppm/°C, which is greater only for extremely low values.The temperature coefficient is always positive.

Insulation to mass: Rheostat parts under tension are insulated towards the mass for tensions up to 1000 V

Ohm values: The rheostats are produced with the ohm values foreseen in the E12 series or, on request, with any ohm value.

Tapered Rheostats: To avoid the use of high power rheostats that take up a lot of space, with winding dimensions in proportion to the highest voltage that passes through the circuit, it is advisable to use rheostats sized with winding wire in variable sections.
The design is developed on a time-by-time basis by our technicians, according to customer specifications.

Tolerance: The normal tolerance of ohm values is –0 +20%

Special Electrical Products
· With tapered windings
· With reduced electric angle
· With zeroed key
· With one or more fixed intermediate sockets
· With winding in several electrically separated sections.


The nominal power indicated in the table may be subject to limitations as a function of the conditions of use of the rheostat, which must not work in environments with temperatures above 100° C in order to avoid compromising some of its components.


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