There should be a circuit breaker (which should be a vacuum switch) and a current transformer above the main circuit. This 35KV loop is sent by cable. In order to prevent power frequency operation overvoltage after using vacuum switch, a varistor is installed on the circuit side.

High-voltage switchgear can be divided into 3.6kV~550kV electrical products, high-voltage disconnectors and earthing switches, high-voltage load switches, high-voltage automatic reclosers and sectional disconnectors, high-voltage operating mechanisms, high-voltage explosion-proof distribution devices and high-voltage switchgear.

Extended data:

From top to bottom, the horizontal line is a bus, and each vertical line leading down from the bus is called an outlet interval. Take an exit interval as an example. From top to bottom are disconnectors (or disconnectors) with two sharp names.

The slash "X" in the middle of the title is the circuit breaker;

The four circles with vertical lines are transformers, and the diagram should be CT(A of current transformer (one for A, B and C phases and one for zero-sequence transformer);

The diagonal line on the left below the four circles and the grounding group are grounding knife switches (or grounding knives);

On the right, the group with the "cow" on the capacitor is lightning protection.

Baidu Encyclopedia-Electrical Diagram

Baidu encyclopedia-electrical symbols