District Chief Zhao Yuxun visited Yunhan Industrial for research and guidance, emphasizing that innovation-driven development and service upgrades will help propel the wire and cable industry toward higher levels of sophistication.

Under the guidance of the innovation-driven development strategy, Henan Yunhan Industrial Co., Ltd. is honored to welcome a research and guidance visit from Zhao Yuxun, District Mayor of Yanshi District, and his delegation. This visit aims to gain a deeper understanding of the current development status of wire and cable enterprises, explore pathways for industrial upgrading, help companies resolve practical challenges, and jointly formulate a blueprint for future development.

2024-05-23

[Preparing for Accreditation and Promoting Development] The Cable Engineering College Held the 2024 Cable Engineering College “Flying High with Hope” Scholarship Award Ceremony

On March 19, 2024, the School of Cable Engineering held a scholarship award ceremony for the “Release Your Dreams” Scholarship Program. The event was graced by the participation and support of Liang Jing, Deputy Secretary of the University Party Committee, as well as senior management from Henan Tongda Cable Co., Ltd. and Henan Yunhan Industrial Co., Ltd. The meeting was chaired by Zhang Kaikai, Secretary of the Party Committee of the School of Cable Engineering. Su Junqi delivered a speech on behalf of the enterprises, emphasizing that the establishment of the scholarship aims to support young people with dreams, encouraging recipient students to cherish this opportunity and contribute to the country’s development. The head of the Student Affairs Department announced the list of 22 scholarship recipients. Liang Jing underscored the importance of university–enterprise cooperation and expressed her hope to further refine cooperative mechanisms, deepen industry–education integration, and enhance students’ overall competencies. She encouraged students to seize this opportunity, be grateful to society, and contribute to the rejuvenation of the nation. The launch of this scholarship program reflects the enterprises’ commitment to supporting education and fulfilling their social responsibilities. The School of Cable Engineering will continue to advance university–enterprise collaboration, improve the quality of talent cultivation, and ensure that students can learn and grow in a nurturing environment.

2024-03-24

Henan Yunhan Industrial Co., Ltd. won the first batch of "high-tech enterprise" honorary certificate in 2023

As an enterprise that continues to carry out research and development and transformation of technological achievements in the "High-tech Fields Supported by the State", Yunhan Industry has formed its core independent intellectual property rights and continuously expanded its business activities. The honorary certificate of "high-tech enterprise" won this time is the best witness to the company's persistence and achievements in technological innovation and scientific research and development.

2024-01-19

The reason why armored cables are relatively expensive.

Armored cables can be applied to cables of any structure in the mechanical protection layer to enhance their mechanical strength and improve their corrosion resistance, making them ideal for wiring and cabling applications in areas prone to mechanical damage and extreme corrosion. They can be installed using any suitable method and are particularly well suited for direct burial in rocky terrain, with their primary function being to prevent rodent gnawing.

2023-06-28

What is a multi-core cable?

1. What Is a Multi-Core Cable? A multi‑core cable refers to a cable that contains one or more insulated conductor cores. Common types of multi‑core cables include 2‑core, 3‑core, 4‑core, 5‑core, 3+1‑core, 3+2‑core, 4+1‑core, and more; the number of cores in control cables can reach as high as 61.

2023-06-28

A Brief Discussion on the Causes of Overheating in Wires and Cables

A cable featuring polyethylene as the insulating material—commonly referred to as PE cable—is a type of extruded insulation cable. PE cables can be used in power cable circuits across a wide range of voltage levels. Typically, PE cables boast high dielectric strength, a high insulation resistance coefficient, a low dissipation factor, a light specific gravity, excellent moisture resistance and processing performance. As we all know, wires and cables tend to heat up during operation; as the load current continuously increases, the ambient temperature around the wires and cables rises accordingly. If this issue is not addressed in a timely manner, once the temperature exceeds a certain threshold, it can have adverse effects on the wires and cables. To effectively address the problem of overheating in wires and cables, we must first understand the root causes behind it. 1. Conductor Resistance Does Not Meet Specifications This is one of the most common reasons for wire and cable overheating. When conductor resistance fails to meet specified standards, it can lead to excessive heating during cable operation. 2. Incorrect Cable Model Selection Poor cable model selection can result in an undersized conductor cross‑section, causing the cable to operate under heavy load conditions. Over time, uneven heat dissipation and thermal management within the cable can lead to overheating. 3. Poor Quality of Connection Joints If connection joints are not properly manufactured or are inadequately crimped, the contact resistance at the interface may become excessively high, leading to overheating in the cable. 4. Excessive Cable Bundling When cables are installed in overly compact bundles, their ventilation and heat dissipation capabilities are significantly reduced. Alternatively, if cables are placed too close to other heat sources, their normal heat dissipation is compromised—both scenarios can cause the cables to overheat during operation. 5. Damage to the Protective Sheath Damage to the armor‑plated cable’s protective sheath can allow moisture to penetrate, gradually degrading the dielectric properties of the insulation. As a result, the insulation resistance decreases over time, which can also lead to overheating during cable operation. In daily life, if you notice that wires or cables are overheating, and you are unable to identify the cause within a short period, it is crucial to promptly contact qualified personnel to inspect and resolve the issue on-site—before a potential fire accident occurs. It also offers advantages such as ease of processing.

2020-07-09