China Zhenglan Cable Technology Co., Ltd Company News

How to judge the quality of fire-retardant wires & cables? 1. Color 1) Color requirements: the color of the sign shall be able to confirm that it follow or approaches a certain color specified in GB6995.2-86 wire and cable identification mark part 2: standard color. 2) Clarity: the color of the sign shall be easy to identify or recognize. 3) Scratch resistance: the mark shall be scratch resistant, and the color after wiping shall be basically unchanged. 2. Number 1) Color requirements: the carrier shall be the same color, and the color of all identification numbers shall be the same color. The carrier color shall be obviously different from the mark color, and it shall be able to confirm that it follow or is close to a certain color specified in GB6995.2-86. 2) Clarity: the number sign shall be clear and the writing shall be clear. 3) Rub resistance: the digital sign shall be rub resistant, and the sign after wiping shall remain unchanged. 3. Imprint mark 1) Form: the embossed mark shall be in the form of embossing or intaglio printing and directly imprinted on the carrier. 2) Clarity: the handwriting of the imprinted mark shall be clear or easy to recognize. 4. Sign line or band 1) Mark line: the mark line used to identify the origin of wires and cables shall be registered according to relevant regulations, and its color can be single color or combination color. 2) Sign belt: the sign belt is printed with words, letters, symbols and other marks, indicating the manufacturer of wires and cables, product voltage level, model, specification, trademark and so on. 3) Clarity: the color of the whole sign line shall be consistent, and the boundary between the two colors in the combined color shall be clear. The color of the sign line and the mark on the sign belt shall be clear and distinguishable. 4) Fastness: when washing with gasoline or other suitable solvent, the color of the mark shall remain unchanged.  

When we need to choose a kind of Low voltage (0.6/1kv) Cables in a project, usually we have to make a decision between the PVC insulated cable and XLPE insulated Cable, in order to make the right choice, you need to know the differences between the two kinds most popular cables. So let's see the differences in the following aspects:   1. Maximum working temperature of conductor: PVC insulated Cable is 70 Centigrade, XLPE insulated Cable is 90 Centigrade. 2. Maximum short (lasting less than 5 seconds) temperature: PVC insulated Cable is 160 Centigrade, XLPE insulated Cable is 250 Centigrade. 3. Service life: Usually, the XLPE insulated cable is longer than PVC insulated cable. 4. Price: Usually, the XLPE insulated cable price is higher than PVC insulated cable. 5. Water Proof Performance in Application Environment: PVC insulated cable is better than the XLPE insulated cable. 6. Environment Protection aspect: For XLPE is not containing chlorine which will release toxic gases once burn, so XLPE insulated Cable is environment friendly compared with PVC insulated Cable. 7. Conclusion: In a long run, the XLPE insulated Cable is better than PVC insulated Cable, but the price is a little higher, but if we take all factors in to consideration(such as environment protection, service life, safety and so on), XLPE insulated cable has a high cost-performance.   At last, there is a question left for you, it is difficult to distinguish the PVC and XLPE from appearance with a naked eyes, so do you know a easy way to distinguish the PVC and XLPE in the Cable?   Welcome to send your inquiry or questions about PVC or XLPE Cables to worldmarket@zhenglancable.com; You also can visit our web www.zhenglancable.com to get more cable information we manufactured and sold.      

Armored power cables are coated with unreactive material to protect them from mechanical damage judging from the environments in which they are commonly found.   1. Advantages of armored cable The armoring material is often hard enough to protect the inner cable from damage. And armored cable for sale also flexible for a variety of applications. There are a number of advantages that come with using armored cables: Cables that are used in large industrial applications often have a lot of challenges during transmission. Both electrical and network cables are meant to be used over long distances. It exposes them to a lot of mechanical threats. Armored cables are able to protect the inner components of the cable. You can use actual transmission from being damaged by different external factors thus hindering transmission. This ensures both power and network availability for the desired applications and hence making armored cables a reliable way of transmission. we have cables that are used for the mains grid, interference from fellow cables and other electrical appliances that are in the path of the transmission line is common occurrence.Using armored cables helps in insulating the transmission components from emitting the interference. And also from being affected by interferences that are being emitted from neighboring cables and also appliances. This is accordance to the EMC (Electromagnetic compatibility) regulations that have been set by a number of institutions in various regions to ensure that all appliances and cables can coexist in the same environments.   2. Commonly used armor types Two types of armor are very commonly used around the world: steel tape armor(STA) and steel wire armor( SWA). Steel tape armour is only used for laying directly buried cable or common through pipe, common ground, tunnel, etc. The steel wire armour can withstand the general longitudinal tension, so it is suitable for short distance overhead laying or vertical and vertical laying. In foreign countries, there are more steel wire armored cables. By comparison, the price for steel wire armour is more expensive. Because the production of steel wire armour is difficult and the cost is high. In terms of current carrying capacity, the difference between the two is not big, but the non-magnetic steel strip or steel wire should be used.   Zhenglan Cable Technology Co., Ltd can supply both the STA and SWA armored power cable. Welcome your inquiry.  

With the rapid increase of household electricity consumption, in order to ensure the safety of household electricity, consumers should pay attention to the following matters when purchasing household electric wires: 1. marks of electric wires According to the state regulations, the surface of the wire should be marked with the name of the manufacturer, wire product model and rated voltage mark.If there is any problem in the process of using the wire, please contact the manufacturer in time. 2. the appearance of the wire Users should pay attention to the appearance of the wire should be smooth and smooth, insulation and sheath layer without damage, mark printing is clear, the surface of the wire without greasy feeling, the thickness of insulation and sheath on the entire circumference of the wire section is uniform, not partial core, insulation and sheath should have a certain thickness. 3.The diameter of the conductor Users should pay attention to whether the conductor diameter is consistent with the section shown on the wire qualification certificate when purchasing the wire. If the conductor section is too small, it is easy to make the wire warm and cause short circuit.Other high-power household appliances such as air conditioners and microwave ovens shall use wires of 2.5 square millimeters or above. 4. Standard use The user should regulate the wiring, BV single core wire is best to wear the pipe when the fixed line, do not break the wire;Do not connect in the middle of a route;Do not touch the wire when the wire is connected to the electrical box (box);In addition, household appliances with large electricity consumption, such as air conditioners, should be supplied by separate power lines;It is best to keep a certain distance between weak and strong wires.

ABC cable with full name as Aerial bundled cables or aerial bundled conductors are overhead power lines using several insulated phase conductors bundled tightly together, usually with a bare neutral conductor. The first European system had a separate catenary wire but later the neutral conductor was modified to act as the messenger as well. In the late 1960’s a system was developed in which all the phase conductors and the neutral conductor are of the same construction. This type is known as the Four Core System and is also in use in many countries.   Why the ABC system? An electrical network should satisfy the need for high level of technology and the low cost of the network. In general the network should meet at least the following requirements: • low cost of total material • low cost of labour • low cost of installation • low cost of annual operation and maintenance • low cost of later extension • high reliability • low cost of achieving safety and technical requirements • low cost of total investment • minimal cost of line route clearing • minimum number of accessories and tools ABC Cable Applications Aerial Bundled Conductor cables can be used to replace bare conductor cables in overhead distribution systems. It is ideal for use in urban areas with congested power distribution and narrow lanes and by-lanes. The flexible system is much easier than conventional overhead power lines to re-route when demanded by changes in urban development plans. As replacement for bare overhead power lines in rural areas; • In areas where space is limited such as narrow streets and lanes; • In forests and woods where there is an increased risk of damage from fallen branches and trees; • As replacement for bare overhead power lines where prime importance is placed on reliability of supply; • Where supply voltage with a high degree of stability is required; • As reinforcement for existing overhead power systems without having to increase voltage; • In difficult terrain like hilly areas where the cost of installing underground cabling or overhead power lines is very high.   Zhenglan Cable Technology Co., Ltd       

(1) When the cable leaves the factory, both ends of it are sealed with plastic sealing sleeve.But in the construction process, after using a part, the remaining part of the wire head is simply wrapped, usually open air and no sealing measures, for a long time, water vapor will infiltrate the cable;   (2) When laying cables, it is necessary to cross roads, Bridges, culverts, etc.However, due to weather and other reasons, the cable trench is often filled with water, and occasionally the cable head is immersed in water.Poor sealing makes it easy for water to enter the cable.In addition, the outer sheath and even the steel armoring will be scratched when pulling and penetrating the pipe.   (3) After the completion of cable laying, the cable head was not made in time due to the restrictions of site construction conditions, so that the unsealed cable fracture was exposed to air for a long time, or even immersed in water, so that a large amount of water vapor entered the cable.   (4) In the process of making the cable end (including the terminal head and intermediate joint), due to the negligence of the construction personnel, there is no contact or immersion of the cable end in water;   (5) In the normal operation of the cable, when breakdown occurs for some reason, the water in the cable trench will enter the cable along the fault point, the cable insulation will be seriously damaged, and water will also cause the cable.