The utility model relates to a breaker ineffectiveness protection auxiliary experimental device comprising a luminescent circuit, a relay ZJ, and a time relay SJ. Two ends of the coil of each of the time relay SJ and the relay ZJ are respectively connected with a positive terminal and a negative terminal of a control power supply bus. An auxiliary contact SJ1 and buttons SB1, SB2, which are parallely connected together, are serially connected between the relay ZJ and the positive terminal of the control power supply bus. An auxiliary contact ZJ1 of the relay ZJ is serially connected between the time relay SJ and the positive pole of the control power supply bus. Auxiliary contacts ZJ5, ZJ2 are respectively serially connected among a green alarming lamp LD and a red alarming lamp HD of the luminescent circuit and the control power supply bus. The breaker ineffectiveness protection auxiliary experimental device is advantageous in that during the breaker ineffectiveness protection debugging process, the ineffectiveness starting contact, the repressing lockout-relieving contact and the bus tie circuit-breaker position contact can be simulated at the same time, and can be returned reliably in the setting time; the experimental device can be used to replace the workers to carry out the automatic inlet switching, and therefore the personal investment can be reduced, and the labor intensity of the workers can be reduced.