A fall protection system for a substation transformer is provided where the substation transformer has a top surface with a lip extending about at least a portion of its periphery. The fall protection system includes a corner mounting assembly configured to couple at or adjacent to a corner of the substation transformer, the corner mounting assembly including a corner mounting element sized to receive a corner post from a rail assembly. A side mounting assembly having a u-shaped bracket is sized to engage the lip, the side mounting assembly having a first clamp positioned to engage the lip, the side mounting assembly further having a side mounting element sized to receive a side post from the rail assembly. The rail assembly includes a plurality of horizontal posts configured to couple with at least one on the corner post or the side post.