Alternating voltage loop test method

Disclosed is an alternating voltage loop test method. Firstly, alternating current is led to each section of bus bars on one side and voltage mutual inductors on each section of bus bars; secondly, current is led to main transformers and the voltage mutual inductors on each side; and thirdly, current is led to each section of bus bars on other sides and the voltage mutual inductors on bus bars. The voltage mutual inductors generate secondarily alternating voltage after the voltage mutual inductors are electrified, the alternating voltage leads current to a terminal box of the voltage mutual inductors through a cable wiring loop, the terminal box leads current to alternating current voltage terminals of relay protection cabinets, telecontrol cabinets, measuring cabinets, metering cabinets and the like through cable wirings, a high resolution voltage measuring instrument is used for detecting voltage terminals of cabinet cases, and test data are obtained. The method has the advantages that primary equipment and wires which are in a missing or wrong connection state can be checked and found; check is complete; equipment and materials are simple and convenient and workload is light; and check is more effective and reliable.