The utility model discloses an unbroken CT
secondary circuit inspection tester which comprises a shell, a
liquid crystal display screen and a
soft keyboard are arranged on the shell, a current output port, a current acquisition port and a
voltage acquisition port are arranged above the shell, and a control mechanism and a
lithium battery are arranged in the shell. An output end of the
lithium battery is connected with a power input end of the control mechanism, output ends of the
soft keyboard, the current acquisition port and the
voltage acquisition port are respectively connected with an input end of the control mechanism, an output end of the control mechanism is respectively connected with input ends of the
liquid crystal display screen and the current output interface, and the current output port is connected to a load side through the
current clamp. The current acquisition port and the
voltage acquisition port are respectively connected with a CT
secondary side terminal; a power switch is arranged at the lower end of the shell. According to the utility model, the impedance measurement of the
secondary circuit can be completed without disconnection of the CT
secondary circuit, the impedance measurement is not influenced by the
inductance of the CT
secondary side winding, the measurement is faster, more accurate and
safer, and the measurement efficiency is improved.