1).載流量不應小于負荷計算電流;

1). Should not be less than the load calculation of current carrying capacity;

2).滿足機械強度的要求;

2). To meet the requirement of mechanical strength;

3).自配電變壓器的低壓母線至盧重機電動機端子的電壓損失，在尖峰電流時，不宜超過額定電壓的15%。

3). The voltage loss from low voltage distribution transformer to Lu heavy machinery motor terminal, the peak current, should not exceed 15% of the rated voltage.

2.少起重機供電線路的電壓損失，可根據具體情況采取下列措施：

2 little crane voltage loss of power supply line, the following measures may be adopted according to the specific situation:

1).電源線盡量接至天車滑線的中部;

1). The central power line as far as possible to crane slide wire;

2).采用絕緣式安全滑觸線;

2). The insulation safety sliding contact line;

3).適當增大滑觸線截面或增設輔助導線;

3). Increasing the sliding contact line section or adding the auxiliary conductors;

4).增加滑觸線供電點或分段供電;

4). To increase the sliding contact line power supply or sectional power supply point;

5).增大電源線或軟電纜截面。

5). Increasing the power line or cable section.

3.絕緣式安全滑觸線裝設膨脹補償裝置的要求，應根據產品技術參數確定。

3 insulation type safety sliding contact line expansion compensation device requirements, should be determined according to the technical parameters of the product.