Ring main unit capable of protecting internal components of transformer substation

The utility model belongs to the technical field of ring main units, and discloses a ring main unit capable of protecting internal components of a transformer substation, which comprises a ring main unit protective door structure, the ring main unit protective door structure comprises a protective door, a locking main body and a shell frame, and the side end of the protective door is rotatably mounted at the front part of the shell frame. The rear wall of the locking body is fixedly connected to the front wall of the protective door, the protective door comprises a door plate, a fixing rod, a rotating sleeve, a guide rod, a spring and a binding rod, the outer wall of the guide rod is slidably sleeved with the side portion of the door plate, the guide rod is fixedly connected to the outer wall of the fixing rod, the rotating sleeve is fixedly connected to the outer wall of the fixing rod, and the guide rod is sleeved with the spring. One end of the spring is fixedly connected to the outer wall of the door plat