1. Any grounding resistance on the crane is not greater than 4 ohm.
2. the section of ground wire shall not be less than the requirements of procedure, that is,the flat steel shall not be less than150mm and the copper wire shall not be less10mm.
3. The bridge crane grounding wire and grounding body, the grounding wire and cart track must reliably welded.
4. The seam crossing of the two rail joint of cart track is welded with metal jumper wire.
5. In general , the metal structure of crane and metal shell, pipe groove, cable and cab of all electric equipment is connected reliably with the cart wheel. Therefore, the emphasis of maintenance of bridge crane is the connection of the wagon tracks and ground wire.
To sum up, we would like to introduce the above four points to you in implementing the grounding device, if you still do not understand, you are welcome to consult Weihua co,. Ltd. We are looking forward to communicating with you.
