According to news on July 12, after China Mobile (Weibo) proposed to build 200,000 TD-LTE base stations next year, China Mobile has become more and more confident about this, according to people familiar with the matter. According to current TD-LTE scale trials in multiple cities The test shows that the TD-SCDMA site upgrades to TD-LTE, and the upgrade task is completed within an hour on average.
It is reported that a deputy minister of the Ministry of Industry and Information Technology went to Hangzhou to investigate TD-LTE last week. In his investigation, he emphasized that TD-LTE should focus on solving technical problems such as terminals and chips, and coordinate overall development and smooth transition with TD-SCDMA.
The test situation of Huawei and other manufacturers in Hangzhou is that the TD-SCDMA site is upgraded to TD-LTE, and the upgrade task is completed within an hour on average. China Mobile summarizes this as "three ones", replacing a baseband board and making software once Upgrade and add a pair of optical fibers.
Xi Guohua, chairman of China Mobile, who was present, said that the success of the Hangzhou TD-LTE trial network is not only the success of the operator, but also the success of the entire industry chain, but the success of TD-LTE still depends on the market to test. He suggested that the state should coordinate the development of TD-LTE, focus on supporting weak industry links such as terminal chips, formulate frequency plans as soon as possible, and coordinate high-quality frequency resources to support the development of TD-LTE,
At present, China Mobile is more and more confident in TD-LTE technology. China Mobile has stated that the TD-LTE industry chain is basically mature. It is expected that by the end of this year, there will be more than 30,000 base stations. By 2013, after the successful TD-LTE scale-up test, new base stations and TD-SCDMA smooth upgrades can be used to increase the number of base stations to more than 200,000.
This has caused the other two telecom operators to be highly vigilant, because if China Mobile first transitions to the 4G era, it will be detrimental to China Unicom (Weibo) and China Telecom (Weibo).
Aerial Insulated Cables Within Rated Voltage Up To Including 0.6/1KV
1. Product standard
The product is manufactured according to the standards of GB12527-90 [Aerial insulated cables of rated voltages up to and including 1KV" and IEC60502 [Extruded solid dielectric power cables for rated voltage from 1KV to 30KV" .
2. Operating characteristics
a. Rated voltage U0/U: 0.6/1kV
b. Max.permissible continuous temperature:
PVC.PE insulated aerial cables:70℃
XLPE insulated aerial cables:90℃
c. Max. short-circuit temperature of the conductor shall not exceed:
PVC insulated aerial cables:160℃;
PE insulated aerial cables:130℃;
XLPE insulated aerial cables:250℃.
d. The installation ambient temperature should not below -20℃.
The bending radiuses of cables are recommended as follows:
When the diameter of cables less than 25mm: not less than 4 times the diameter of cables;
When the diameter of cables not less than 25mm: not less than 6 times the diameter of cables.
e. When the cables use in alternating current system, rated voltage of cables should be at least equal the rated voltage of the system; When the cables use in direct current system, rated voltage should be not greater than 1.5 times of the rated voltage of the cables.
3. Type of cables and main usage
Type of cable:
JKV: Copper conductor PVC insulated aerial cables
JKLV: Aluminum conductor PVC insulated aerial cables
JKY: Copper conductor PE insulated aerial cables
JKLY: Aluminum conductor PE insulated aerial cables
JKYJ: Copper conductor XLPE insulated aerial cables
JKLGV: ACSR conductor PVC insulated aerial cables
JKLGY: ACSR conductor PE insulated aerial cables
JKLGYJ: ACSR conductor XLPE insulated aerial cables
Main usage:
The cables fit for overhead fixed-installation, service line and so on.
4. Construction of cable
1) Conductor
2) Steel core
3) Insulation
4) Conducor screen
Steel ACSR Power Cable,Hot Dip Galvanized Power Cable,Conductor Power Cable,Overhead Power Cable
Huayuan Gaoke Cable Co.,Ltd. , https://www.bjhygkcable.com