The invention discloses a wiring method, device and system for a voltage transformer. The method includes the following steps that: the neutral point of the primary side of a three-phase voltage transformer is grounded through a zero-sequence voltage transformer; the corresponding residual windings of the three-phase voltage transformer are in jump connection so as to form a closed triangle, wherein each single-phase voltage transformer is provided with one residual winding, the residual windings are used to generate residual voltages when a single-phase grounding fault occurs; the residual windings are connected in series with a target resistor, the loop current value of the closed triangle during the single-phase grounding fault can be determined according to the resistance value of thetarget resistor, wherein the loop current value is less than or equal to the capacity value of the secondary side of the three-phase voltage transformer. With the wiring method, device and system forthe voltage transformer of the invention adopted, the technical problem of the poor effect of a 4PT wiring mode in the prior art in suppressing a ferromagnetic resonance fault can be solved.