6 characteristics of copper tube bus | insulated busbar terminal
Both the terminal connector and the intermediate connector (bus connection accessories) are connected to the copper tube type bus in the form of a ring ferrule. The contact area is large, the force between the circle and the circle is average, the contact surface is greater than 10 times the cross section of the conductor, the contact resistance is less than the conductor resistance, and the junction temperature rise is lower than that of the conductor.
1. The copper bus has a large current carrying capacity
The copper tube bus is a hollow conductor with a large surface area, and the current density is evenly distributed on the surface of the conductor. Copper tube conductor is Φ100X5mm, copper tube conductor is Φ100X10mm, cross-sectional area: 2826mm2, current carrying capacity: 6000A, current density: 2.12 (A / mm2). Therefore, the copper tube bus is particularly suitable for circuits with large operating currents.
2. The copper tube bus has greater insulation
2000V voltage, high and low temperature resistance (±250℃). The shielded and sleeve-type insulated copper tube bus has a metal shield, sealed, waterproof, grounded shell and zero potential; the main insulation material of the bus with a rated voltage of 10kV is PTFE 3.6mm, and the power frequency withstand voltage is: 105kV / 1 minute .
3. Low power loss of insulated copper tube bus
The skin effect coefficient of the insulated copper tube bus is low, Kf <1, and the AC resistance is small, so the power loss of the tube bus is small. Using a copper busbar insulated with multiple rectangular conductors, the effective current-carrying capacity per unit section decreases, the current distribution between the sheets is uneven, the additional loss increases, and the heat dissipation conditions are poor.
4. Increased the support span of the insulated copper tube bus
The allowable stress of the insulated copper tube bus is 4 times that of the rectangular bus, the acceptable short-circuit current is large, and the mechanical strength is high, so that the bus support span is larger
5. Good heat dissipation conditions for insulated copper tube bus
The insulated copper tube bus is a hollow conductor, and the inner diameter of the busbar can naturally form hot air convection (the difference between indoor and outdoor air pressure can naturally form hot air convection), and the heat dissipation conditions are good.
6. No condensation on insulated copper tube bus
The insulated copper tube type bus eliminates the need for post insulators, and uses metal shielding, the shell is grounded, and the potential is zero; when condensation occurs, the shell of the supporting part will not be discharged. Non-polluting flashover of insulated copper tube bus.
insulated busbar terminal