Insulation fault positioning device in hospital isolated power supply system

The utility model discloses an insulation fault positioning device in a hospital isolated power supply system. The device is used for determining an insulation fault branch of the hospital isolated power supply system. The utility model adopts the technical scheme that: the device consists of a test current detection circuit, an analog/digital (A/D) conversion chip, a singlechip, a test current generating and adjusting limit circuit and a fault branch display circuit, wherein the output end of the test current detection circuit is connected with the input end of the A/D conversion chip, the output end of the A/D conversion chip is connected with the input port of the singlechip, and the input ends of the test current generating and adjusting limit circuit and the fault branch display circuit are connected with the output port of the singlechip. The device has simple structure, is convenient to install, and can automatically and quickly determine the fault branch on the premise of ensuring the power supply continuity; and the test current meets the insulation fault detection requirement of a medicinal treatment place, so the device is particularly suitable for insulation fault positioning of the hospital isolated power supply system.