Ht-instruments MACROTEST G3 Manual do Utilizador descarregar pdf (Página 107)

MACROTESTG3 - COMBIG3

EN - 106

a) resistance of a vertical rod

Rd =  / L

where L = length of the element touching the ground

b) resistance of a horizontal rod

Rd = 2 / L

where L = length of the element touching the ground

c) resistance of linked elements

The resistance of a complex system made of more elements in parallel is always higher

than the resistance, which could result from a simple calculation of single elements in

parallel, especially if those elements are close to each other and therefore interactive. For

this reason, in case of a linked system the following formula is quicker and more effective

than the calculation of the single horizontal and vertical elements:

Rd =  / 4r

where r = radius of the circle which circumscribes the link

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Ht-instruments MACROTEST G3 Manual do Utilizador Página 107