1. When a fault occurs in the busway with dual bus connection, attention should be paid to the operational mode of busway protection during the fault handling process. If necessary, the busway protection should be temporarily shut down.

2. When the busway voltage completely disappears, the dispatcher should immediately switch off the switches (including the bus tie switch) that may receive power and notify the operating team to perform an external inspection of the busway.

3. If the busway experiences a fault leading to voltage loss along with clear signs of a short circuit (such as sparks, explosions, smoke, etc.), the operating team members must not resume operation on their own and should conduct a detailed inspection of the busway equipment.

4. In case of component failure connected to the busway or trip-out caused by a refusal of the feeder breaker, resulting in the busway losing voltage, a detailed inspection should be carried out. Isolate the faulty components in the busway or open the knife switches on both sides of the faulty feeder breaker. Quickly restore busway operation and supply power to other feeders.

5. During long-term operation of the busway, it is necessary to conduct an annual regular check on the temperature rise of the joints. The temperature rise of the bridge joints should not exceed 70K according to the GB7251 standard (ambient temperature of 40 degrees). Check if there is any loosening of the connecting bolts and contact parts of the conductive bodies at all busway joint connections. Prevent an increase in contact resistance due to loosening, leading to heating at the joints. Inspect for aging of the insulation materials and melting or deformation of the conductive parts.

If phase-to-ground faults or insulation breakdowns are found, the busway should be dismantled in sections and tested section by section with a withstand voltage tester to identify the fault, replace the busway, or reapply insulation coating as necessary.