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Design calculations_examples.pdf

Resistance heating alloys for electric appliances 1 Metal sheathed tubular element. EXAMPLES Tubular element for a flat iron Rating, P 1000 W Voltage, U 220 V Final tube diameter 8 mm (0.315 in) Final tube length 300 mm (11.8 in) If the terminal length inside the tube is 2 × 25 mm the coil

Design calculations.pdf

DESIGN CALCULATIONS AND STANDARD TOLERANCES Example: Tubular element for a broiler application Element power rating: 2,000 W (P) Voltage: 230 V (U) Final tube diameter 8 mm Final tube length 1,000 mm As a first step it is of importance to find out the actual heating zone length. If the

Appliance calculations.pdf

DESIGN CALCULATIONS AND STANDARD TOLERANCES Example: Tubular element for a broiler application Element power rating: 2,000 W (P) Voltage: 230 V (U) Final tube diameter 8 mm Final tube length 1,000 mm As a first step it is of importance to find out the actual heating zone length. If the

Design calculations of wire elements.pdf

DESIGN CALCULATIONS AND STANDARD TOLERANCES Note: The diagrams are valid for thyristor control. For on-off control lower surface loads should be chosen (about - 20%). 12 10 9 8 7 6 5 4 3 2 1 Surface load, W/cm2 800 850 900 950 1,000 1,050 1,100 Furnace temperature, °C 800 850 900

Formulas and definitions.pdf

APPENDIX FORMULAS AND DEFINITIONS Rating Voltage Current Resistance The following formulas and definitions apply to all applications: DEFINITION: Resistivity, ρ Ωmm2/m (Ω/cmf) The resistance of a conductor, R20, is directly propor- tional to its length, L and inversely proportional to its

Design calculations for heating elements_examples.pdf

APPENDIX EXAMPLES Tubular element for a flat iron Rating, P 1,000 W Voltage, U 220 V Final tube diameter 8 mm (0.315 in) Final tube length 300 mm (11.8 in) If the terminal length inside the tube is 2 × 25 mm the coil length (Le) will be Le = 300 mm – (2 × 25 mm) = 250 mm (9.8 in). Hot