In the process of using the bridge, the grounding methods are different according to the different installation occasions. Do you know what kind of grounding methods are used? Next, we will sort out the relevant content for you.
There are three possible installation situations and grounding methods for the bridge:
1. When the bridge system is allowed to form the grounding trunk circuit, the connection resistance between the ends of the bridge should not be greater than 0.00033 ohm, and the insulation coating should be removed from the grounding hole. In the 1kV and below neutral point direct grounding system, the grounding of the receiving equipment is connected with the neutral line of the system.
2. When installing the dynamic cut-off power supply installation, the metal cross-sectional area in the direction of the bridge length shall not be less than the specified value. When another grounding main line is laid along the whole length of the bridge, at least one point of each section (including non-linear section) of the bridge shall be reliably connected with the grounding main line.
How to ground the bridge in different occasions
3. For vibration places, the grounding points of different installation occasions of bridge: spring coil should be installed at the connection of grounding parts.
The connecting plate can be used as the jumper wire between the cable trays to connect the trays as a whole. Galvanized spring washer is added on the two connecting bolts at both ends of the connecting plate. The bridge is bridged with soft copper wire, and then the bridge is connected with the grounding wire to form an electrical path. There shall be no less than two connections between the whole bridge and the grounding main line. After the completion of grounding operation, inspection and acceptance are required.