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The railway line of electrified railway plays the role of railway grounding, and the metal parts of oil loading equipment on the ground should be grounded or directly connected. If these elements are located in the overhead conductor area of electrified railway with nominal voltage, they shall be connected to the rail by fuses.
If the fuse is used for grounding, the component and cathodic protection device shall not be connected with railway grounding under normal operation conditions. It is necessary to monitor the fuse. The track of electrified railway is the conductor of return current. There is voltage between it and the distant earth, also known as rail potential.
All grounding devices (including buried metal pipes) within 2m away from lightning rod shall be directly connected with lightning rod or connected through spark gap. If the pipe connecting the lightning rod has insulated joint, the insulated joint must be connected with spark gap. The track of electrified railway and all railway tracks more than 20 meters away from the connecting point of lightning rod and track must be treated as lightning rod.
If the protection current requirements of underground storage tanks and pipelines are relatively large, the protection current must be provided by multiple anodes to reduce the interference to many underground equipment near the railway. When the space is limited and the output current of each anode is low, the impact resistant anode should be used.
Only with the approval of the railway department can the current discharge test be carried out near the track, because it may cause interference to the railway signal system. As the pipelines near the electrified railway can carry the railway return current, it is necessary to avoid the spark generated when cutting the pipeline or metal parts when connecting the two sides of the pipeline with the railway grounding or bridging.
Shandong Linyi Bosi conductive materials Co., Ltd. is a high-tech enterprise specializing in the production of MMO flexible anode, conductive polymer flexible anode and titanium coated anode, mainly providing cathodic protection technology, engineering design, installation and technical services.
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