Good News | We warmly congratulate Kunbao Cable on being recognized for the fourth consecutive year as a Yunnan Province Contract-Abiding and Creditworthy Enterprise!
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2025-12-31

Good News | We warmly congratulate Kunbao Cable on being recognized for the fourth consecutive year as a Yunnan Province Contract-Abiding and Creditworthy Enterprise!

Relying on its long-standing commitment—from the rigorous review of contract signing to the efficient execution of delivery and the thoughtful after-sales service—Kunbao Cable Group has put the spirit of contract into practice through concrete actions. As a result, it has been recognized for four consecutive years as a “Contract-Abiding and Credit-Respected” enterprise in Yunnan Province (2022–2025).

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Unafraid of copper price fluctuations, Kunbao remains committed to its promise—let us be your trusted long-term partner!
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2025-12-22

Unafraid of copper price fluctuations, Kunbao remains committed to its promise—let us be your trusted long-term partner!

True core materials forge quality; meticulous craftsmanship and rigorous inspections uphold our original commitment. Kunbao Cables provide comprehensive protection against market fluctuations. Choose Kunbao Cables, and together we’ll move forward side by side, striving for glory and achieving a win-win future!

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Cable manufacturer: 6 major elements of continuous heating of high-voltage cables in operation
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2023-01-20

Cable manufacturer: 6 major elements of continuous heating of high-voltage cables in operation

Cable manufacturer: 6 major elements of continuous heating of high-voltage cables in operation 1. The resistance of cable conductors does not meet the requirements, and the constituent cables suffer from fever in operation. 2. The cable selection type is unreasonable, the cross section of the wire that makes up the cable used is too small, and the load condition occurs during operation. After temporary application, the cable fever and heat exhaust imbalance form the phenomenon of fever. 3. Excessive placement of cables during installation, poor actual effect of ventilation and heat removal, or too close to other pyrogenics of the cables, seriously affecting the stable heat removal of the cables, and possibly causing fever in the cables during operation. 4. The production and manufacturing of the connector is not good, the socket is not close, the circuit resistance at the constituent interface is too large, and the phenomenon of cable fever will also be formed. 5, the cable phase insulation function is not good, the composition of the grounding resistance is relatively small, the operation will be fever phenomenon. 6, armored cable cable part of the protective wire sleeve damage, water seepage after the insulation layer function composition slowly damage the actual effect, composition of the grounding resistance gradually reduced, but also the composition of the cable in the operation of the fever phenomenon. After the occurrence of fever in the power cable, if no factors are found to clean the problem immediately, the insulation breakdown will occur after the cable is plugged in again. Component cable morbidity

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Cable manufacturers: What are the main reasons for the return of power cables?
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2023-01-10

Cable manufacturers: What are the main reasons for the return of power cables?

Cable manufacturers: What are the main reasons for the return of power cables? 1, in the normal operation of the cable, if due to various reasons such as penetration failure, the cable trench water will follow the cause of the failure into the cable internal structure; in civil engineering, especially in the application of large and medium-sized construction machinery construction, cable damage or penetration safety accidents caused by various human factors are also common. When this kind of safety accident occurs, the cable insulation layer is damaged, which will also lead to water seepage of the cable. 2. After the cable is laid, the cable head is not made in time due to the restriction of the conditions applied on the spot, so that the broken surface of the cable without sealing treatment is exposed to the air for a long time or even immersed in water, causing a lot of water vapor to enter the cable. 3. When the new cable is shipped, both ends of the cable are sealed with plastic sealing sleeves, but Shi I used it on the spot in combination with the actual situation-after a period of time, the remaining part will be simply tied up with plastic film to break the surface, because it is usually placed outdoors and the airtightness is not very good, and water vapor will inevitably penetrate into the cable for a long time. 4. In the production of cable head (including terminal head and intermediate joint), considering the carelessness of the staff, the newly processed cable end sometimes falls

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Why is it difficult to find low-voltage cable faults?
NEW

2023-01-03

Why is it difficult to find low-voltage cable faults?

The fault finding of low-voltage cables is not much different from the fault diagnosis of high-voltage cables. The principles, methods and techniques are exactly the same. Only when the flashover test and fixed-point test are carried out, the impulse voltage can be properly controlled to avoid damage to the overall insulation level of the cable due to the high impulse voltage. The difficulty of low-voltage cable fault distance is usually caused by the following reasons: 1. The three-head cable laying process is not standardized. The main reason is that the ground wire or neutral wire is not handled properly, resulting in unsatisfactory test waveforms. Specifically, a. the steel armor of the intermediate joint is discontinuous; B, steel armor is not grounded. 2. Test wiring error. Multi-finger, non-shielded and non-shielded multi-core cables will cause undesirable waveforms, and even reflected waves will not cause rough measurement failure. The specific performance is as follows: a, no grounding in the non-test phase; B, test phase grounding; C, test line and shielded wire reverse connection; D, whether the shielded wire is connected with the grounding phase or steel stern; E, the shielded wire is directly connected to the grounding column unrelated to the cable under test. It can be seen that when we regulate the operation of cable construction, maintenance and repair, the situation will be much better. A rough measurement of the fault distance will reduce the uncertainty. In addition, the location of the fault is a problem because it has many key factors. This is mainly due to the failure of the fixed point of the low-voltage cable.

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What is the difference between high voltage cable and low voltage cable?
NEW

2023-01-03

What is the difference between high voltage cable and low voltage cable?

High-voltage cables and low-voltage cables belong to a kind of power cables, mostly used for transmission lines. There is a big difference between high-voltage cables and low-voltage cables, mainly reflected in the following aspects: 1. different voltage levels: according to GB/T2900.50-2008 "GB/T2900.50-2008 General Terms for Power Generation, Transmission and Distribution", 1KV (including 1KV) The following voltage is defined as low voltage, and 1KV-330KV is defined as high voltage. Therefore, the rated voltage of 1KV and below is called low-voltage cable, and the rated voltage of 1KV-330KV is high-voltage cable. The common cables in our work and life are 0.4KV and 10KV voltage grade cables. The following analysis will focus on these two voltage class cables. 2. structural differences: 1. High-voltage cable: YJV22-8.7/15KV-3*70: High-voltage 15KV copper core XLPE insulated PVC sheathed steel tape armored three-core 70m2 cable. (1) Stranched copper conductor: A conductor used to transmit electrical energy, made of stranded hard wires. (2) Conductor shielding layer: Because the conductor is twisted by several hard wires, there are gaps on the surface, which will cause uneven electric field and partial discharge. Therefore, the use of conductive non-metallic soft material filling

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International Business:0871-67334199
Business fax: 0871-6738 8841
Sales Phone:18213841134(Liu Zong)0871-67388840
Company Headquarters: 11th Floor, Tower 1, Dongju Jiaxin Business Center, Guandu District, Kunming City, Yunnan Province
Production base: Xiaoshao and other areas of Qidian Industrial Park, Chenggong District, Kunming City, Yunnan Province

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