How to connect 10kv high voltage aluminum cable and copper cable?

Regardless of high voltage or bottom pressure, there should be relevant measures for the transition between copper and aluminum: At the copper wire joint, the crimping nose of the copper-aluminum transition is used for tinning.

Crimping If it is the middle head to use the copper and aluminum transition of the casing, the practice is the same as above, explain that the connection between the copper wire and the aluminum wire must be treated by shabu shabu, otherwise the aluminum wire will be oxidized quickly when passing the current, which will lead to circuit failure: thank you.

10 kV high voltage aluminum cable and copper cable. Solder them together. This has a longer lifespan.

When the 10kV high-voltage aluminum cable is connected with the copper cable, the copper-aluminum connection strip can be used.

It is necessary to use 3*35 square millimeters of aluminum core high-voltage cable.

High-voltage cable is a kind of power cable, which refers to the power cable used to transmit between 10kV and 35kV (1kv = 1000V), and is mostly used in the main road of power transmission. The product implementation standards for high-voltage cables are GBT and GBT.

The components of a high-voltage cable from the inside to the outside include: conductor, insulation, inner sheath, filler (armor), and outer insulation. Of course, armored high-voltage cables are mainly used for burial, which can resist high-intensity compression on the ground and prevent damage from other external forces.

1000kVA transformer, high-side rated current:

The area of the selected aluminum core high-voltage cable shall not be less than: 50 square millimeters.

According to p= so the high voltage current is i=. It is necessary to use 3*35 square millimeters of aluminum core high-voltage cable.

50mm2 aluminum core cable may not work, but also consider your 10kv short-circuit current, 50mm2 aluminum core cable may not meet your short-circuit current thermal stability requirements, if not meet you still have to increase the cross-section of the cable.

There is nothing special about wiring (referring to elevated), that is, there are certain procedures in operation, first, in the transmission and distribution room to be guarded by a special person (in case someone sends electricity), second, when you wiring the line from the transmission and distribution room you have to reliably enter the ground, third, between your hands with a wire connection to be reliably conducted, fourth, the person to be reliably insulated.

I don't know what material and specification your cable is, the terminals and joints of power cables should take measures such as strengthening insulation, sealing and moisture-proof, and mechanical protection. The terminals and joints of power cables above 10kv should still have effective measures to improve the concentration of electric field at the end of the cable shield, and ensure the distance between the outer insulation phases and the ground, and the semi-conductive shielding layer should be completely removed when the terminals and joints of plastic insulated cables are made. For the covered graphite shielding layer, solvent should be used to wipe off the ink, for the extruded shielding layer, the insulation surface shall not be damaged when peeling, the shielding layer should be flat, the three-core oil-paper insulated cable should be retained as a turnkey insulation 25mm shall not be damaged, the carbon ink paper should be peeled, the end should be flat, the bending radius of the wire core should not be less than 10 times its diameter, and the air gap at the branch of the wire core should be eliminated when wrapping or pouring and filling the insulating material.

There should be a clear color mark on the cable termination, which should be consistent with the phase of the system, and the joint should have moisture-proof measures.

In enterprises or civil transmission lines, it is common to encounter the problem of mutual electrical connection between copper bars, aluminum bars, copper and aluminum cables, and terminals. In these connections, as long as there are two different materials of copper and aluminum at both ends of the connection, the problem of copper and aluminum joints will be encountered. According to historical experience, if certain measures are not taken for copper and aluminum connections, it is easy to heat, corrode, and disconnect at the connection point, resulting in electrical faults such as power supply line disconnection, short circuit, and power outage.

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In order to make copper and aluminum joints as strong as joints of the same material, there are several measures:

1. When the aluminum wire is connected to the copper terminal (for example, the aluminum cable is connected to the air switch), the copper-aluminum transition terminal (wire nose) needs to be used.

2. Copper and aluminum copper wire: use copper and aluminum transition conduit.

3. Copper wire connection aluminum bar: copper tube aluminum head copper-aluminum transition wire terminal, but because the amount of this terminal is small, the market is not easy to buy, the method taken by the author in practice is to crimp a copper bar with multiple bolts on the aluminum bar at the joint, and connect the copper wire terminal on the side of the copper bar, as long as the contact surface is large enough, it can also solve the problem of copper and aluminum joints.

4. Aluminum bar to copper bar: it is more than twice the length of the ordinary metal overlap, and more bolt compaction.

5. Connect the aluminum bar to the air switch: first connect a section of copper bar on the air switch, and then do it according to the fourth article.

6. Apply a small amount of white petroleum jelly to the aluminum bar joint to reduce the corrosion of the aluminum bar.