Relay protection test conversion device and method

The invention relates to a relay protection test conversion device. The method is characterized by comprising the following steps; the four standard input terminals A, B, C and D are respectively connected to four terminals A, B, C and N of an external alternating-current reflux power supply; and the + output terminal and the-output terminal are connected with a pointer meter/direct current resistance tester input terminal and a pointer meter/direct current resistance tester output terminal of the pointer meter/direct current resistance tester, and six outputs of AN, BN, CN, AB, BC and CA arerealized through six buttons. The design is scientific and reasonable, only four terminals need to be connected with A, B, C and N of alternating current backflow in the whole working process, and twoterminals at the output end are connected with a pointer meter or a direct current resistance tester; output of six conditions of AN, BN, CN, AB, BC and CA is realized through six buttons, and the output is convenient and fas