Positioning means comprises a positioning tube and a retainer, which is a fixed function of the position of the contact line

Positioning device includes a positioning tube and locators, its purpose is to fix the position of the line of contact, the contact wire in pantograph running track range, to ensure the contact line and pantograph without electri cenergy meter and horizontal loads to pass the line of contact pillar.
Subjected to contact with the underlying pillar for the suspension, the support and positioning means the entire load, and the fixed contacts at a predeterminedElectric transformer and height. China catenary used mcb circuit breaker concrete pillars and steel columns, based on terms of steel pillars, namely steel pillars fixed in the following made ​​of reinforced concrete, based on the pillar from the foundation to withstand all the loads to pass, and to ensure pillar stability. Prestressed concrete pillar and foundation made ​​of a whole, lower direct buried underground.