Sliding Rheostats Hardware Reference Document 1101067 - Edition June 2009

Sliding Rheostats Hardware Reference Email: [email protected] Website: www.coudoint.com Address: 19, Avenue de la gare Document 1101067 – Edition June 2009 Information and products subject to change without prior notice

Sliding Rheostats Hardware Reference 1 General Description Series: Sliding rheostats come in three series: • SN series for power ratings from 315 W to 2670 W • STV and SQV series for power ratings from 1500 W to 7000 W Higher power ratings are achieved by assembling several STV or SQV units. Design: Sliding rheostats are constructed with: • One to four ceramic cylinder(s), all identical for a given model. These cylinders are available in 5 sizes (mm): 350 x 40 (315 W) ; 500 x 60 (720 W) ; 600 x 60 (890 W) ; 700 x 100 (1250 W); 800 x 120 (1750 W) a wirewound resistor : . made of nichrome or copper-nickel...

Sliding Rheostats Hardware Reference 2 Product Selection Guide 2.1 Product selection table The following matrix shows the different models and circuit diagrams for each series , ranked in column by type of tube and in rows by increasing maximum achievable current (lowest total ohmic values in the range of feasibility) and by number of circuit diagrams. For each model are given: – the connections diagram numbers: S1 pour Connections diagram 1, etc. – the range of ohmic feasible values (per winding / cylinder) – the power rating Maximum achievable current (A) Type of the tubes for the rheostat...

Sliding Rheostats Hardware Reference 2.2 Maximum Current Maximum current: The current in each winding (= for each tube) must not exceed the value IMXB at which the rheostat is at its maximum power PMXB. , otherwise the product could be damaged. If RB is the total ohmic value of the resistance wire for one tube, IMXB is defined by PMXB = RB x I²MXB. The diagrams below show the curves of maximum acceptable current per winding vs. the total ohmic value of the winding. The maximum acceptable current for the rheostat depends on the internal wiring diagram of the product: Please refer to the tables...

Sliding Rheostats Hardware Reference 3 SN Series (SN and SNV) 3.1 Models SN and SNV: Design : these models have only one ceramic cylinder (one circuit); they differ in: • • the size of the cylinder: 350 x 40 or 500 x 60 or 600 x 60 mm the use of a sliding knob (SN) or a hand wheel (SNV – not possible with a 350 x 40 mm cylinder) Specifications: Type of ceramic cylinder Features Power rating PMX Maximum current per winding IMXB1 Overall length (T), SN models Overall length (T), SNV models Range of feasible ohmic values RB per winding 1: See curves and precautions of use on page 5. 2: Weight value...

Sliding Rheostats Hardware Reference Connections diagrams: Diagram number Connections diagrams Function (variable load or rheostat) and current Variable load: 2 terminals Parameters for ordering a standard model: • • • • ohmic value, sliding knob or hand wheel (hand wheel not possible with a 350 x 40 mm cylinder), 4 mm mounting receptacles or safety sockets, connections diagram. Optional features: • • • mechanical stop, graded winding, “Ayrton-Perry” winding. Document 1101067 – Edition June 2009 Information and products subject to change without p

Sliding Rheostats Hardware Reference 3.2 Models SND and SNDV: Design: these models are constructed of 3 wirewound ceramic cylinders. They differ in: • • the size of the cylinders: 500 x 60 or 600 x 60 a sliding knob (SND models) or a hand wheel (SNDV models) for driving the slider Specifications: Type of ceramic cylinder Features Power rating PMX Maximum current per winding IMXB1 Overall length (T), SND models Overall length (T), SNDV models Range of feasible ohmic values RB per winding 1: See curves and precautions of use on page 5. 2: Weight value depends on the type of wire and the ohmic value...

Sliding Rheostats Hardware Reference Connections diagrams: Diagram number Connections diagrams Function (variable load or rheostat) and current Dual variable load: 2 x 2 terminals RT = RB and IMAX = IMXB for each load Dual rheostat: 2 x 3 terminals RT = RB and IMAX = IMXB for each circuit Single variable load: 2 terminals Single rheostat: 3 terminals Parameters for ordering a standard model: • • • • ohmic value, sliding knob or hand wheel, 4 mm mounting receptacles or safety sockets, connections diagram. Optional features: • • • • mechanical stop, graded winding, “Ayrton-Perry” winding, special...

Sliding Rheostats Hardware Reference 3.3 Models SNT and SNTV: Design : these models are constructed of 3 wirewound ceramic cylinders. They differ in: • a sliding knob (SNT models) or a hand wheel (SNTV models) to control the slider Specifications: Type of ceramic cylinder Features Power rating PMX Maximum current per winding IMXB1 Overall length (T), SNT models Overall length (T'), SNTV models Range of feasible ohmic values RB per winding 1: See curves and precautions of use on page 5. 2: Weight value depends on the type of wire and the ohmic value of the rheostat. Dimensions: - SNT models with...

Sliding Rheostats Hardware Reference Connections diagrams: Diagram number Connections diagrams Function (variable load or rheostat) and current Triple variable load: 3 x 2 terminals RT = RB and IMAX = IMXB for each load Triple variable rheostat: 3 x 3 terminals RT = RB and IMAX = IMXB for each circuit Single variable load: 2 terminals Single rheostat: 3 terminals Parameters for ordering a standard model: • • • • ohmic value sliding knob (SNT) or hand wheel (SNTV), 4 mm mounting receptacles or safety sockets, Connections diagram number. Optional features: • • • • mechanical stop, graded winding,...

Sliding Rheostats Hardware Reference 3.4 Product Identification Code SN Total ohmic value: nnnRddd for nnn.ddd Ω Connections diagram : (empty): 1 cylinder "D": 2 cylinder "T": 3 cylinder Slider type: SND(V) & SNT(V) : "S1" for Diagram 1 "S2" for Diagram 2 "S3" for Diagram 3 "S4" for Diagram 4 Size of the ceramic cylinders: (empty): sliding knob "V": hand wheel Type of terminals : "E": safety sockets "I" : mounting receptacles The identification code above is followed: – when ordering from the list of the optional features which are not described in the code, – internally, from a special code...