Bolt insertion direction requirements

1. For three-dimensional structures: Horizontally, from the inside out; vertically, from bottom to top.

2. For planar structures: Along the power line direction, double-sided components proceed from the inside out, while single-sided components enter from the power-transmitting side or follow a uniform direction; across the power line direction, both sides proceed from the inside out, and the middle from left to right (facing the power-receiving side) or follow a uniform direction; vertically, from bottom to top.

3. For transformer platform planar structures: Using the high and low voltage terminals of the transformer as reference directions, proceed from the low voltage terminal end towards the high voltage terminal end; using the transformer and pole as reference directions, proceed from the transformer side towards the pole side (from the inside out).