What is the role of busbar short circuit calculation?

The commonly used calculation method is the impedance matrix method, and the superposition principle is used to make the network state after short circuit = the state of the network state fault component before the short circuit, and add a potential equal to the voltage of the node and the opposite direction before the fault, and reuse it. The impedance matrix can obtain the voltage value of the fault component of each node, and the voltage of the node after the short-circuit fault is obtained by the voltage before the fault of the node. Xiaobian today introduces the function of the short circuit calculation of the busbar machine to verify the mechanical stability and thermal stability of the electrical equipment; verify the interrupting capacity of the switch; determine the setting value of the relay protection and safety automatic device; design and select the system Provide the basis for the main electrical wiring; perform fault analysis; determine the electromagnetic interference of the transmission line to adjacent communication lines.
In turn, the current through the branches can be determined for short-circuit faults. The hoisting process of the busbar type busbar hoisting technology measures The preparation work before hoisting will weld the pipe mother to the actual required length. The tube mother is transported under the installation position, and the sleeper is placed under the tube to prevent the tube from being scratched. The tube-pillar insulators are installed and calibrated, and the horizontal error and axis deviation of the tops of the insulators on the same horizontal plane should not exceed 5 mm. Check that the surface of the tube and the fittings are smooth and free of damage. The surface of the fittings should be free from cracks and rust, and the anti-loose fittings are complete. Hoisting (suspended tubular busbar hoisting) connects the tube and the fitting together, installs the equalizing ring, and the equalizing ring is evenly symmetrical. Note that the reinforcing joint of the tube should be on the upper and lower sides, not on the side. Hang the pulley on the round pipe above the hanging point of the hanging insulator of the beam, and hang the u-ring of the insulator string with 4 wire ropes, pass the pulley, connect the wire ropes of the same side, and then connect one The wire rope is connected to the motorized winch.
When lifting, two winches are started at the same time, and it is necessary to coordinate lifting. During the lifting process, keep the tube in the flat position as much as possible. If there is an isolation switch under the tube, use two hemp ropes to connect the insulator string to the tube mother, and pull the tube to avoid the isolation switch. After connecting the four strings of insulator strings, measure the height of the tube mother from the ground. If the requirements are not met, adjust the basket screw to meet the requirements. Safety Precautions When hoisting, special personnel should be assigned to perform the same action. When lifting, the four strings of insulator strings should be lifted at the same time. The commander should use a whistle and flag command to enable the constructor to clear the command signal. Check the safety of the pulleys and wire ropes before lifting. During the hoisting process, the inside of the pipe and the inside of the corner of the wire rope shall not stand. High-altitude workers must wear safety helmets, safety belts, and soft-soled shoes to prevent falling objects and falling from high altitudes. When the tube is transported, the force points should be evenly distributed to prevent deformation of the tube. The motorized winch should be operated by experienced workers. During the lifting process, the operator should pay attention to the commander's signal to stop and rise in time. For motorized winch, if you need to use the equipment bracket to make the cow, you must use a sack to protect the equipment bracket to prevent sharp zinc.
The short-circuit calculation of the busbar machine affects the final operation result. It may be that everyone does not care about the error of the calculation, but it is not the case that the slightest error will affect the final conclusion.