A brief analysis of the causes and prevention measures of grounding wire errors for diesel generator rentals

A brief analysis of the causes and prevention measures of grounding wire errors for diesel generator rentals

Diesel generator rentalDuring use, irregular use may cause equipment failure or safety hazards, which greatly reduces the service life of the equipment. When the diesel generator is rented, the neutral line of the machine is not directly connected to the grounding main line, but is connected through the generator foundation slot. The steel is connected in series and the anti-loosening parts are incomplete; metal objects such as the generator body and mechanical parts are not reliably grounded. Metal objects such as the generator body and mechanical parts are not reliably grounded. When the generator is running to provide power, if a ground fault occurs, the protection circuit It cannot operate normally and endangers personal safety.

Analysis of the reasons for the incorrect grounding wire of diesel generator rental: First, no technical explanation was made before installation, no grounding lead-out point was reserved during the main construction, it was difficult to lead the grounding wire from other places, and the grounding in the linkage switching cabinet was unreliable. ;The other 2 diesel generator sets are generally installed and debugged at the equipment supplier's expense. Some installers are not familiar with the basic requirements for grounding, do not know the relevant standards and construction acceptance specifications, or are just for convenience and think that as long as grounding is enough The reason is that the generator neutral wire is connected in series through the foundation channel steel; metal objects such as the generator body and mechanical parts are not reliably grounded because the installer is not familiar with the regulations or the work is sloppy and the inspection is not careful.

Preventive measures for incorrect grounding wires of diesel generator rentals: First, technical explanations on the grounding system should be strengthened before installation of diesel generator rentals; Second, the generator neutral line (working neutral line) should be directly connected to the grounding trunk line , should not be connected in series through the foundation channel steel, and the anti-loosening parts should be complete; 3. When renting a diesel generator, metal objects such as the body and mechanical parts should be reliably grounded. It should be noted that the grounding connection should use a soft connection, and the bolt connection must have Anti-loosening measures should be taken to prevent the connection from loosening due to the vibration of the generator; 4. Before the generator is commissioned, the installation unit should conduct a self-inspection of the generator grounding system and pass the inspection by the supervising engineer before commissioning.