MEASURING INSTRUMENT SWITCH TO TEST QUALITY OF POWER SUPPLY CIRCUITS IN ELECTRICAL SYSTEMS DURING THEIR ASSEMBLY Russian patent published in 2015 - IPC G01R31/02 

FIELD: electricity.

SUBSTANCE: invention is related to the area of process systems and may be used to test power supply circuits of an electrical system. The invention concept is as follows: the device contains three input circuits (for connection to supply buses and the system frame) and four output circuits to connect measuring instruments (ohmmeter and megohmmeter), a switch for three positions and four directions, a diode and two low-ohmic resistors R1 and R2 with different rated values of resistance and essentially less equivalent resistance of Rh load to the supply buses (R1≠2)<Rh and electrical couplings between the device components, which ensure safe testing of power supply circuits of the electrical system in process of its assembly.

EFFECT: increase in production rate, exclusion of effect of interference and errors of the measuring instrument connection on reliability of the assembled electrical system, provision of reliable and authentic control and error or defect detection in the assembled electrical system, including fault-to-frame identification for any power supply buses of the assembled electrical system.

2 cl, 1 dwg