The utility model provides the utility model discloses an ac voltage withstand test and the portable test device who leads to electric test belong to test device technical field, including parts such as box, GL three -phase switch, TLC three -phase regulator, ISA change over switch, ST time relay, test connector, meter meters. The utility model discloses small, easy operation, demonstration are clear, nimble handy, possess output single phase alternating current and three -phase alternating current's function simultaneously, can satisfy on -the -spot ac voltage withstand test and logical electric test's demand completely, time relay adopts square digital time relay, and each item data homoenergetics such as service environment, delay time, repetitive error satisfy the utility model discloses a withstand voltage 60s automatic action's performance index can be accomplished in the requirement. The utility model discloses greatly improved test efficiency, strengthened the security and the suitability of work, be suitable for and extensively use widely.