Portable spare power automatic switching calibrator

The invention relates to the technical field of substation equipment detection, disclosing a portable spare power automatic switching calibrator. The portable spare power automatic switching calibrator is provided with a transmission and distribution circuit of a primary system pipe network of an analog substation, and comprises two analog high-voltage bus circuits, two analog low-voltage user circuits and a power supply, wherein the contacts of a high-voltage DL (delay line) module connected with the two analog high-voltage bus circuits are connected with a direct-current power supply respectively by a vacuum switch; the high-voltage DL module is connected with the analog low-voltage user circuits by a low-voltage DL module and a vacuum switch; and a low-voltage sectioned DL module is arranged between two analog low-voltage user circuits. The portable spare power automatic switching calibrator provided by the invention can accurately and reliably detect the function of a spare power automatic switching automatic device, is convenient in use and low in maintenance and manufacture cost, and ensures that power failure accident hidden danger brought by practical belt switch driving is avoided and the power supply reliability is enhanced, thereby providing convenient conditions for detecting the spare power automatic switching device and having strong economical benefit and social benefit.