How many models of cross arm and hoop of low voltage 10 m pole of Tianjin hose hoop

The installation height of cross arm is determined according to the site conditions: in general, the top cross arm does not need to be installed at all times? Whether it is high and low pressure and cross arm, when installing, the upper plane of cross arm is installed at 20 cm below the rod tip. Special case "is the high-voltage cross arm, because the top support hoop is installed on the pole top in some areas (that is, the hoop is installed on the pole top, and a supporting insulator is installed on the top of the pole)? It is used to support phase B high-voltage line. It is called top support hoop in Tianjin. The distance between lines is required. The cross arm on the top floor of Tianjin hose hoop manufacturer is installed 40 cm from the top of the pole. In the south, there is a kind of bridge top cross arm. A door type flat steel is welded upward from the center. In the flat steel, the center opening is used to fix the B-phase supporting insulator. The cross arm installation is that the upper plane of the gate iron is flush with the pole tip. When setting, the low-pressure cross arm is 1 under the high-pressure cross arm. It can be installed at 2m? Move down or up, but ensure the safety distance between high and low voltage conductors and the ground (the lowest point of the conductor should not be less than 6 meters from the ground of the road to prevent vehicles from scraping). The four line cross arms are the low-voltage cross arms and Tianjin hose hoops, which are commonly referred to as 380V power electric power, and the three-wire cross arm is the high-voltage cross arm, with the voltage "above 6K; V. The cross arm is generally not divided into high and low pressure. Except the cross arm on the bridge top and the combined cross arm are special cross arms for high pressure, other cross arms are generally of uniform shape and size! Inch shape! Completely one. Sample, the upper plane is generally the average distribution of four "holes, four holes all! The installation of low-pressure porcelain bottle is: low-pressure cross arm, only use the side holes on both sides to install high-pressure porcelain bottle: it is high-pressure Tianjin stainless steel clamp, cross arm. Hope to, you have; help.