China Zhenglan Cable Technology Co., Ltd Company News

1. Ordinary flame-retardant wires and cables The insulating and sheathing materials of ordinary flame-retardant wires and cables are generally polymer materials containing halogen (or modified by adding halogen containing flame retardant). Polyvinyl chloride (PVC) is commonly used. Ordinary PVC resin has the characteristics of high electrical insulation, chemical resistance, abrasion resistance, aging resistance and low price. However, when PVC burns, it will release hydrogen chloride, carbon monoxide, carbon dioxide, various aromatic hydrocarbons, chlorinated compounds and other toxic and harmful gases. 2. Low smoke halogen-free flame retardant wire and cable The insulation and sheath materials of low smoke and halogen-free flame-retardant wires and cables are mostly thermoplastic elastomer materials, which do not contain halogens such as fluorine, chlorine, bromine and iodine. Mercury, chromium, cadmium, lead and other heavy metal elements that pollute the environment are excluded from the production process. Polyamide is often used as the material. The flame-retardant mechanism of this cable is that of interrupt switching. Interrupted exchange flame retardant refers to taking away part of the heat generated during the combustion of flame retardant materials, so that the materials can not maintain the thermal decomposition temperature, and therefore can not continue to produce combustible gas, so the combustion is self extinguished.   Zhenglan Cable Technology Co., Ltd manufacture flame retardant wire, low smoke halogen-free flame retardanet wire, fire resistant wire, flame retardant and fire resistant wire. Welcome your inquiry.  

Dear Customer, Thanks for your visiting our website. Kindly note we are on a 7-day National Day holiday from October 1st(Saturday) to 7th(Friday) and will be back from October 8th( Saturday). During holiday, we may have limited access to email and work may be delayed or stop temperaturely. We will contact you the first time we came back. Kindly ask for your understanding. Zhenglan Cable Technology Co., Ltd 2022.9.30

When a single core cable is started or stopped by alternating current or direct current, a corresponding alternating magnetic field will be generated around the cable, and an induced current will be generated in the metal material. This current flows inside the metal material, much like a vortex of water, so it is called eddy current, or eddy current for short. The thermal effect of eddy current can heat the metal materials in a short time. If the heat cannot be emitted in time, it will cause the cable insulation layer to melt or accelerate the aging, and the insulation performance will be weakened, thus causing cable breakdown.   The armored steel strip has good magnetic conductivity, which can be magnetized under a small magnetic field and generate eddy current. Non magnetic materials such as stainless steel tape, copper tape, aluminum tape or non-magnetic metal wire shall be used for armouring of single core cables.   In addition, it is better to lay single core cables in finished form during construction. Single core cables should avoid magnetic materials as far as possible, such as iron pipes, iron clamps, etc., which can form closed loop magnetic materials.   In addition, for a three core cable, the alternating magnetic fields generated by the three core phase relationship cancel each other, so that the sum of the induced current vectors is 0, and no magnetic force lines pass through the armor. Therefore, steel tape armouring can be used.

Dear Customer, Thanks for your visiting our website. Kindly note we are on Mid-Autumn Festival holiday from Sept 10th to 12th. Work resume from Tuesday( Sept, 13th). During holiday, all work will become slow compared with normal days. But we will get back to you as quickly as we can after holiday. Thanks for your support as always. Sincerely yours, Zhenglan Cable Technology Co., Ltd Sept 9th, 2022

Tinned copper wire has a silver appearance because tin is a silver metal. The process of tinned copper wire is a little more complicated than that of bare copper wire. At room temperature, tin is very stable in the air, because a dense oxide film will be formed on the surface of tin to prevent the continued oxidation of tin. Therefore, the copper surface is tinned, the first does not affect the resistance, and the second can improve the oxidation resistance of copper to a certain extent.   The purpose of tinning, silver plating (or even gold plating) for wire and cable conductors is to prevent copper wires from being oxidized and blackened at high temperature and humidity, and to improve conductor solderability and reliability. The operating environment of photovoltaic power plants is generally harsh, and they are often installed in deserts, barren mountains, water surfaces, roofs and other environments. It is required that the resistivity of photovoltaic cables must be good, not easy to oxidize, and can be used for a long time. Therefore, tinned copper wire is selected as the conductor will best fits the use environment and has the most stable electrical performance.   Zhenglan Cable supply power cable, solar cable, feel free to send us your quote.

The main function of the electric wire is not to spread the current to objects outside the target while conducting electricity, which is mainly the function of the insulating layer. Therefore, a good insulation layer is the best guarantee to avoid some risks caused by electricity consumption. The insulation layer is plastic, so we can try to test the plastic method to check the quality of the wire.       So it's easy. Just remember these steps：   1. Pull: If the quality of the insulating layer is poor, it will be easily deformed and cracked when pulling hard. Try to pull as much as possible. It is difficult to judge whether the quality of the insulating layer is good or bad. 2. Folding: Bend a small section of cable at will, if there is no break or white mark at the bend, the quality is good. 3. Ignite: Ignite the wire with fire, and light it with a lighter. If it does not catch fire when it is lit, it is a high-quality wire. It is a good flame retardant wire. If it is lit and emits thick black smoke, it will catch fire on its own after leaving the flame. Don't even think about it. You buy garbage and throw it into the trash can immediately. 4. No odor: It is fake and inferior wire that smells stinky, and the high-quality insulating layer will not have odor that suffocates the nose even if it is ignited.