Excuse me, expert: is it acceptable to ground the shielding layer of transformer cables? Are there any relevant standards?

I. Grounding is mandatory. According to clause 10.1.3 of the \"SHT 3038-2017 Standards for Electrical Design of Petrochemical Plants\", the following parts of electrical systems, plants, or equipment shall be provided with protective grounding: j. The enclosures of power cable junction boxes and terminal boxes, the metal sheaths or shielding layers of power cables, as well as steel pipes used for conducting wires or cable trays. II. The diagram you provided is not very clear; the shielding layer of the cable is grounded to the steel framework, and the lower end of the steel framework is already grounded, which meets the requirements. But they went the extra mile and installed a set of three-phase short-circuit grounding wires; it’s not clear what purpose these wires serve. Moreover, the grounding of these wires was done using copper wires, which is an incorrect approach – bolts should be used for such connections.

The image is not clear; the shield grounding must be done at a single point, and shield grounding and protective grounding should be separated