How to use insulation megger to measure insulation resistance of power cable

1. The performance of power cable insulation material decreases irreversibly with service time and environment, which is called insulation aging. The manifestations of insulation aging are as follows: breakdown strength decreases, dielectric loss tangent increases, local leakage and discharge increase, mechanical strength and other properties decrease. 2. In the aging process, the time required for … Read more

On the core breaking of flame retardant copper wire and cable

With the development of economy, the industry of wire and cable is also changing and developing. The application demand of wire and cable is also increasing. Meanwhile, the flame retardant and fire-resistant wires have emerged. How to detect the quality of these wires? So, let’s talk about the detection of the core breaking of flame … Read more

From January to March, China’s optical cable output increased by 25.2% year on year

The National Bureau of statistics released the output and growth rate of China’s major industrial products from January to March. Among the 100 major industrial products listed, except for fax machines, only 4 products showed a year-on-year decrease in output from January to March 2020. Among them, the cumulative output of abc cables was 63.996 … Read more

Several points for attention in extrusion of silicone rubber cable

Abstract This paper presents the application of silicone rubber in the acsr cable industry, some problems and solutions in the production of silicone rubber cable. Key words: silicone rubber, mixing, extrusion, coke burning, foaming, technology 1、 Preface Because of its high heat resistance and excellent cold resistance, silicone rubber has a long-term temperature range of … Read more

Laying and installation of pre branched cables

1、 Laying and installation of pre branch cable Prepare for laying and installation according to the requirements of design drawings and be familiar with the laying direction and location of cables. (1) Formulate construction plan and organize professional construction personnel. (2) Prepare for installation of tools and equipment. (3) Verify the abc cable model and … Read more

Hazards of unqualified cables

Nowadays, in the acsr cable market with mixed advantages and disadvantages, various production indexes are not up to the standard in an endless stream. If you can’t select high-quality cables with good quality and quantity, the harm in the later stage is unimaginable. The harm of unqualified cables is too great. Therefore, when you choose … Read more

Technology, the safety of the cable’s internal structure depends on it. Do you know these materials!

Cable sheath is the outermost layer of cable, which is the most important barrier to protect the safety of internal structure in the cable, and protects the cable from mechanical damage during and after installation. Cable sheath is not intended to replace the reinforcement armor inside the cable, but they can provide a fairly high … Read more

Brief introduction of extrusion technology of ceramic silicone rubber in fire-proof cable

There are many infrastructure and engineering construction projects in our country. High rise buildings, petrochemical industry, airports, tunnels, ships, offshore oil platforms, aerospace, iron and steel metallurgy, shopping malls and other places all put forward fire protection requirements for cables. Therefore, PVC insulated cables have huge potential development space. In recent years, our company has … Read more

On the characteristics of flexible fireproof cable

Flexible fireproof cable, also known as “inorganic mineral insulated cable”, is developing rapidly in China because it is softer and easier to install than mineral insulated AAC Cable. Product model 1. Bttw copper core rolled copper sheath: flexible inorganic mineral insulated fireproof cable, rated voltage 750V; 2. Yttw copper core rolled copper sheath: flexible inorganic … Read more