Subway lead-out device is professionally manufactured with Guodian quality

规格：

长度

108：

1.5米。3米

108：

1.5米。3米

Product Introduction In the subway grounding system, due to the protection requirements for fault current (stray current), the grounding grid is located under the structural floor. Therefore, when the electrical equipment on the subway platform is grounded, it must be connected to the grounding grid through a grounding down lead. In the past, the grounding down conductor was usually led out directly from the structural floor or through a pipe. In this way, the protection requirements for fault current (stray current) were easily not met, and groundwater could easily escape from the grounding lead wire. seepage, failing to meet the subway grounding design requirements.
The ground lead-out device is composed of several parts such as a protective tube, a water stop ring, a ground lead-out wire, and insulating filling materials. The protective tube is made of stainless steel, the grounding lead wire is made of copper bar, and the hollow part of the protective tube is filled with insulating material. It has the advantages of reasonable structure, advanced technology, scientific material selection, stable and reliable quality, and convenient construction and installation. When the grounding of power equipment, signaling equipment, lightning protection grounding and comprehensive grounding grid are connected, it can effectively prevent the seepage of groundwater and meet the protection requirements of fault current (stray current).
Model Specifications
Model
Specifications
Model
Specifications
Type
?
Type
?
Type
?
Type
?
Type
?
Type
?
Construction precautions
. Ground lead-out The outer surface of the device protection pipe is coated with anti-rust paint (epoxy coal tar thick-lay anti-rust paint)
． The protective pipe of the grounding lead-out device should be higher than the civil structure surface, and the reserved length of the grounding lead-out wire should be no less than
higher than the protection pipe opening. The protective tube of the grounding lead-out device passes through the center of the steel mesh of the structural bottom plate (the protective tube does not contact the structural steel bars). The space between the grounding lead-out wire and the protective tube is filled with insulating filling material to ensure the insulation between the grounding lead-out wire and the structural steel bars< br/>． The location of the lead-out point of the ground lead wire (out of the station structural floor) should be located near the cable well in the mezzanine under the platform slab or in the cable mezzanine under the strong/weak current equipment room on the platform level, avoiding the track bottom air duct, structural walls and tracks, etc. , the location of the lead-out point needs to be confirmed by relevant professionals
. During the construction process, it is necessary to strengthen the protection of the grounding lead-out device to prevent mechanical damage and chemical corrosion
. The connection between the grounding lead wire and the grounding grid adopts exothermic welding (exothermic welding) method.