Closed bus duct line resistance is small

When selecting the specifications of the closed bus duct, the conductor cross-section should be as large as possible to ensure sufficient remaining capacity; more plug-in interfaces should be provided, but the operating height and power feeder path must be taken into consideration, because the vertically arranged closed bus duct sockets are too In most cases, the height of the plug-in box on each floor will be too high, making operation and maintenance inconvenient. Since the closed bus duct structure is much heavier than the cable tray, designers should be advised to consider the hoisting space.

Since the line impedance of the closed bus duct is very small, when selecting the circuit breaker in the plug-in box, a model with a matching short-circuit breaking capacity should be selected; for closed bus ducts installed vertically on the shear wall, it is not necessary to provide the building designer with payload data. In this case, compared with the conventional power supply method, the closed bus duct does not have high requirements for the balanced distribution of the electrical load, so it has strong adaptability to the situation of very uneven load.

Reduce ground faults and avoid phase-to-phase short circuits. The separated-phase enclosed Busbars are protected by shells, which can eliminate external moisture and dust, as well as ground faults caused by foreign objects. The split-phase enclosed busbars also prevent the occurrence of phase-to-phase short circuits. Reduce inter-phase short circuit and electric force. Due to the double shielding effect of eddy current and circulating current on the shell, the short-circuit electric force on the inter-phase conductor is greatly reduced.

To eliminate steel structure heating, the isolated phase closed busbar is shielded by a shell, which can fundamentally solve the problem of induction heating. The shell includes branch circuits in the same phase, is fully electrically connected, and adopts multi-point grounding to greatly simplify the way the shell is basically at equipotential grounding and eliminate the risk of personal electric shock. Reduce the voltage loss of thE Busbar system, so that the busbar has a higher conductor effective carrying capacity.