Relay protection analog quantity secondary N line latent fault online positioning system

The invention provides a relay protection analog quantity secondary N line latent fault on-line positioning system. The relay protection analog quantity secondary N line latent fault on-line positioning system comprises two microswitches and a fault detector. The two microswitches are embedded in the cavity of the wiring terminal, and operating buttons of the two microswitches are arranged close to the wire inlet and the wire outlet respectively. A signal source in the fault detector is connected with male pins of the two microswitches, and a signal receiving circuit is connected with normally closed contacts on the two microswitches; after the secondary N wire inlet wire is connected, if the operation button of the wire inlet microswitch is pressed to interrupt the forwarding of the electric signal, the signal receiving circuit determines that the wire inlet wire connection state is normal; otherwise, the operation is abnormal; after the secondary N line outgoing line is connected, if the operation button of