Rotary Rheostats
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Rotary Rheostats Hardware Reference Document 1101066 - Edition June 2009

Rotary Rheostats Hardware Reference Email: commercial@coudoint.com Website: www.coudoint.com Address: 19, Avenue de la gare Document 1101066 – Edition June 2009 Information and products subject to change without prior notice

Rotary Rheostats Hardware Reference 1 Main Features Series: Rotary rheostats come in 6 standard models, each model with a different power rating : T16 (16 W), T25 (25 W), T50 (50 W), T100 (100 W), T150 (150 W), T300 (300 W). Higher power ratings are achieved with tandem mounted units. These units may be used to replace the obsolete models T500 (500 W) and T1000 (1000 W). Design: Rotary rheostats are constructed with: • a ceramic tore, specific to each model a wirewounded resistor: . with a nichrome or copper-nickel wire for a low TCR (Temperature Coefficient of electrical Resistance)...

Rotary Rheostats Hardware Reference 2 Product Selection Guide 2.1 Product Selection Table Maximum power rating Feasible total ohmic values The product identification code takes into account its particular specifications (model, type of coating, number of modules, rotary button and / or scale, ohmic value, etc.) according to the description given on page 11. 2.2 Maximum Current Maximum current: The current in each turn of the winding shall not exceed the IMAX value at which the rheostat dissipates its maximum power level PMAX, otherwise the rheostat could be damaged. IMAX depends on the...

Rotary Rheostats Hardware Reference 3 Base Models 3.1 Model T16 Feasible (total) ohmic values: 1.5 Ω to 10 kΩ Features: Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and then on the ohmic value of the rheostat. Dimensions and panel mounting: A: Mounting by 8 mm diameter threaded collar B: Anti-rotation pin C: Terminals: 3 stainless steel 4 mm wide Faston connectors Ohmic value Coating: silicon or vitreous enamel Rotary knob (with or without) Scale...

Rotary Rheostats Hardware Reference 3.2 Model T25 Feasible (total) ohmic values: 1.5 Ω to 30 kΩ Features: Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and the ohmic value of the rheostat. Dimensions and panel mounting: A: Mounting by 10 mm diameter threaded collar B: Anti-rotation pin C: Terminals : 3 stainless steel 5.5 mm wide Faston connectors Ohmic value Coating : silicon or vitreous enamel Rotary knob (with or without) Scale (with or without)...

Rotary Rheostats Hardware Reference 3.3 Model T50 Feasible (total) ohmic values: 1.5 Ω to 25 kΩ Features: Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and then on the ohmic value of the rheostat. Dimensions and panel mounting: A: Mounting by 10 mm diameter threaded collar B: Anti-rotation pin C: Three 4 mm diameter threaded terminal pins Ohmic value Coating : cement, silicon or vitreous enamel Rotary knob (with or without) Scale (with or without)...

Rotary Rheostats Hardware Reference 3.4 Model T100 Feasible (total) ohmic values : 1.8 Ω to 20 kΩ Features : Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and then on the ohmic value of the rheostat. Dimensions and panel mounting: A: Mounting by threaded collar Ø M10 B: Anti rotation pin C: 3 threaded terminal pins Ø M4 Ohmic value Coating: cement, silicon or vitreous enamel Rotary knob (with or without) Scale (with or without) See identification...

Rotary Rheostats Hardware Reference 3.5 Model T150 Feasible (total) ohmic values: 0.5 Ω to 50 kΩ Features: Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and the ohmic value of the rheostat. Dimensions and panel mounting: A: Rheostat mounting by three 6 mm screw holes spaced 120° apart on a Ø 110 mm circle B: Scale mounting by two 4 mm diameter screw holes with an interaxial distance of 55 mm C: Three 4.5 mm diameter threaded terminal pins...

Rotary Rheostats Hardware Reference 3.6 Model T300 Feasible (total) ohmic values: 1 Ω to 20 kΩ Features: Features Testing voltage Maximum working voltage Rotation torque Electrical travel Mechanical travel Tolerance on ohmic value Average weight* *: Weight value depends on the type of the wire and then on the ohmic value of the rheostat. Dimensions and panel mounting: A: Rheostat mounting by three 6 mm screw holes spaced 120° apart on a Ø 162 mm circle B: Scale mounting by two 4 mm diameter screw holes with an interaxial distance of 55 mm C: Three 4.5 mm diameter threaded terminal pins...

Rotary Rheostats Hardware Reference 4 Product Identification Code T150 Total ohmic value: "S": silicon "C": cement "V": vitreous enamel "X": without scale "C": with scale Number of ganged modules: Rotary knob: "X": without knob "B": with knob This identification code is followed: – when ordering, from the list of the optional features which are not described in the code, – internally, as a special code if the product cannot be considered as a standard model. 5 Temperature Rise Curves Temperature rise (° Celcius) Power rating (watts) Document 1101066 – Edition June 2009 Information and...

Rotary Rheostats Hardware Reference 6 Examples of Designs 6.1 900-watts Rotary Rheostat Dual T300-rheostat with rotary knob and scale. Document 1101066 – Edition June 2009 Information and products subject to change without prior notice