The invention relates to a real-time monitoring method for short-circuit current of a near zone of a
transformer, and the real-time monitoring method is characterized in that three non-inductive resistors connected in series onto three current transformators at the
secondary side of the
transformer are used for sending acquired analog signals to an analog / digital (A / D) sampling unit through an
isolation amplifier, a low-pass filter, an absolute converting unit and a range self-adaption unit; the A / D sampling unit is used for continuously acquiring the analog signals; a first processor is used for computing read current sampled data, screening to obtain a wavelike current effective value and the fault instantaneous value of break-variable of current and caching fault data at the
fault occurrence moment to a dual ported memory; a second processor is used for receiving the fault data of the dual ported memory and communicates with an upper computer through a
network interface to draw an oscillogram, and simultaneously, the second processor is used for performing statistics on the received fault data and storing to a large-capacity memory. According to the real-time monitoring method for the short-circuit current of the near zone of the
transformer, acquisition, recording and analysis are performed on the short-circuit
impact current at the
secondary side of the transformer, and an accurate basis can be provided for the running state analysis and the maintenance of the transformer.