WELDING CONTACT RESISTANCE MEASUREMENT METHOD Russian patent published in 2012 - IPC G01R27/00 

FIELD: electricity.

SUBSTANCE: one performs activation of the contacting machine in the short-circuit and load mode, measurement of current and voltage drop within the section of the secondary circuit containing the welding electrodes, determines power factor in the short-circuit mode cos φ_s and in the load mode cos φ while resistance R_w of the welding contact is calculated as where U_2s and U₂ - voltage drop within the section of the secondary circuit in the short-circuit and load mode; I_2s and I₂ - current in the secondary circuit in the short-circuit and load mode.

EFFECT: enhancement of welding contact resistance determination accuracy.

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