GB 50052-2009 第3.2.3条
| The clear distance between the distribution equipment in the substation and the roof shall not be less than 0.8 m, and the distance from the wall shall not be less than 0.6 m; the width of the operating aisle for high-voltage switchgear: for fixed-type single-row arrangement, not less than 1.5 m; for double-row arrangement, not less than 2.0 m.