Zhengzhou Wubai Cable and Wire Co.,Ltd

The concept of smart city first appeared in the media field, it refers to the use of various information technologies or innovative concepts to open and integrate urban systems and services to improve resource utilization efficiency, optimize urban management and services, and improve the quality of life of citizens, among which Different wires and cables such as photovoltaic cables and household cables play a vital role in it. Wires and cables are a large category of commodities for welders, which are used to transmit power engineering, transmit information content and complete electromagnetic induction and magnetic fluid power generation. In the whole process of sampling inspection in the recent period, the national quality supervision department found many substandard products. Such counterfeit and shoddy products have caused many hidden dangers to the normal operation of the power system.

Among them, there are many reasons for the failure of cables. The following  will show you what is unqualified and what are the manifestations. Please pay more attention when purchasing cables in the future.

1. Identify unqualified wires and cables

Marking is a key method for wire and cable applications to identify the basic information of commodities. The specific content of the standard mark is: product specification, specification, model, standard number, company name, factory address, etc. If the mark is unqualified, it will lead to improper use by users, thereby More serious and eventually lead to safety accidents of electrical equipment.

2. Wire and cable with unqualified construction specifications

The key to the construction specification mainly depends on the thickness of the insulating layer. When the thickness of the insulating layer of the cable is unqualified, it will easily lead to a serious reduction in the electrical compressive strength of the cable. Equipment short-circuit failure and fire accidents, etc.

3. The conductor resistance of the wire is unqualified

Conductor resistance is mainly used to evaluate whether the conductor material of the wire and cable and its cross-section are consistent with the key index values. When the conductor resistance exceeds the standard value, the current loss on the path will increase, and the heating of the wire and cable will also increase, resulting in inconsistency. Qualified conductor resistance is due to the fact that in order to better control costs, poor quality copper is used or the cross-sectional area of ​​the cable is reduced, and the use of such cables not only accelerates the aging of the insulation, but also is likely to cause serious accidents such as fires and many more.

During the whole process of purchasing photovoltaic cables, consumers should pay attention to the following issues:

1. Observe the appearance of the wire. The insulating layer (wire sheath) of the qualified product is soft, malleable and elastic, and the surface layer is inseparable, smooth and smooth. If the plastic encapsulating the wires peels off easily, there is a problem of insufficient compressive strength of the plastic.

2. Look at the cross section of the wire. The surface of the core of a qualified product should have a metallic feel and the blackened copper on the surface indicates that it has been oxidized.

3. When purchasing wires, please pay attention to the quality certificate. If the quality of the wire meets the standard, there will be a corresponding inspection certificate.