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Chinese people will never forget the major day of the opening of the "6.
30" Beijing-Shanghai high-speed railway in the world's attention, but they can not forget the "7.
23" Wenzhou bullet train mega railway traffic accident, this successive accidents not only show the weakness of the Beijing-Shanghai high-speed railway in the catenary and power supply system, but also expose the lack
of technology of China's high-speed railway power supply testing equipment.
The ridicule of other countries is still in the ears, and China's scientific researchers should strengthen the protection measures for the safety of high-speed railway power supply cables, not only to learn advanced technology from foreign high-end equipment PCB copy boards, but also to put forward a series of high-tech measures and constructive improvement plans
verified by domestic practice.
Fault analysis of high-speed railway power supply cable in China
China's 27.
5kV and 10kV AC high-speed rail power supply cables are all components
of the introduction of European and Japanese high-speed rail technology.
When digesting and absorbing this technology, the PCB board design and construction of some high-speed railways have taken many detours in combination, resulting in the technology of single-core high-speed rail power supply cable operation has not met the requirements, and has not caught up with the international level
.
According to the investigation, since 2010, 44 sudden power outage accidents of a high-speed railway in China have been caused by the breakdown of the intermediate joint, and the insulation resistance of the outer sheath of the single-core cable has not met the requirements of the national standard and caused by large-scale damage problems, cable fault point detection difficulties and water branches are also important reasons for
failure.
Imported high-speed rail cable testing equipment localized development
In the face of the severe operation safety situation of China's long and large high-speed railways, in order to no longer allow frequent power outages in China's high-speed railways, in order to prevent China's high-speed railways from being affected by bad weather such as thunder and lightning
.
Shenzhen Longren Reverse Research Division (www.
pcbwork.
net) is a high-tech enterprise specializing in double-sided, multi-layer circuit board copying (clone board), board modification, BOM list production, reverse thrust schematic, PCB mass production, chip decryption, prototype production, SMT processing, etc.
, specializing in providing complete solutions for electronic products for domestic and foreign customers.
In order to narrow the gap between domestic products and foreign high-end technology, we have long used PCB reverse research methods to carry out localized development of imported equipment
.
In view of the current technical status of high-speed rail cable testing equipment, Longren has introduced a series of advanced high-speed rail cable testing equipment from Germany, such as cable outer sheath fault tester, wire and cable high-resistance fault locator, cable dielectric loss tester and other instruments and equipment for PCB board copying and secondary development innovation research, as shown in the figure below
Cable dissipation tester
Research on the performance of high-speed rail cable tester for PCB copying
Studies have shown that it is very necessary to evaluate the health status of the outer sheath of the cable, which can effectively reduce the invasion of water branches and premature aging
of equipment caused by water branches.
The outstanding contribution of the cable outer sheath tester is to strictly guard the gate to prevent the intrusion of moisture that is extremely unfavorable to the operation of the cable
.
Its main functions are: outer sheath withstand voltage test, outer sheath fault prepositioning and precise positioning
.
Another portable dielectric loss tester is very suitable for the scientific evaluation of the aging state of the cable insulation layer with rated voltage 3kV-20kV, and is compatible with its brand pure sine wave ultra-low frequency 0.
1Hz AC withstand voltage test system, and can find and identify the completely aged cable to be overhauled and replaced in time from the cable equipment database after connection, so as to avoid sudden power
failure of the cable system caused by aging.
The instrument can not only detect insulation defects in advance, but also connect directly to the VLF test system to quickly measure the dissipation value of the measured object and store the results
.
Longren has successfully completed the PCB copy board reverse innovation research of this series of instruments, not only mastered the core technical data such as PCB documents, bill of materials, schematic diagrams, etc.
, but also further PCB design and development in the process of reverse research, realized rapid equipment upgrade, and at the same time played a role in "checking and filling gaps" in the shortcomings of China's high-speed rail equipment in many domestic practical applications
.
Chinese people will never forget the major day of the opening of the "6.
30" Beijing-Shanghai high-speed railway in the world's attention, but they can not forget the "7.
23" Wenzhou bullet train mega railway traffic accident, this successive accidents not only show the weakness of the Beijing-Shanghai high-speed railway in the catenary and power supply system, but also expose the lack
of technology of China's high-speed railway power supply testing equipment.
The ridicule of other countries is still in the ears, and China's scientific researchers should strengthen the protection measures for the safety of high-speed railway power supply cables, not only to learn advanced technology from foreign high-end equipment PCB copy boards, but also to put forward a series of high-tech measures and constructive improvement plans
verified by domestic practice.
30" Beijing-Shanghai high-speed railway in the world's attention, but they can not forget the "7.
23" Wenzhou bullet train mega railway traffic accident, this successive accidents not only show the weakness of the Beijing-Shanghai high-speed railway in the catenary and power supply system, but also expose the lack
of technology of China's high-speed railway power supply testing equipment.
The ridicule of other countries is still in the ears, and China's scientific researchers should strengthen the protection measures for the safety of high-speed railway power supply cables, not only to learn more advanced technologies from foreign high-end equipment, but also to put forward a series of high-tech measures and constructive improvement plans
verified by domestic practice.
Fault analysis of high-speed railway power supply cable in China
Fault analysis of China's high-speed railway power supply cable Fault analysis of China's high-speed railway power supply cable
China's 27.
5kV and 10kV AC high-speed rail power supply cables are all components
of the introduction of European and Japanese high-speed rail technology.
When digesting and absorbing this technology, the PCB board design and construction of some high-speed railways have taken many detours in combination, resulting in the technology of single-core high-speed rail power supply cable operation has not met the requirements, and has not caught up with the international level
.
According to the investigation, since 2010, 44 sudden power outage accidents of a high-speed railway in China have been caused by the breakdown of the intermediate joint, and the insulation resistance of the outer sheath of the single-core cable has not met the requirements of the national standard and caused by large-scale damage problems, cable fault point detection difficulties and water branches are also important reasons for
failure.
5kV and 10kV AC high-speed rail power supply cables are all components
of the introduction of European and Japanese high-speed rail technology.
When digesting and absorbing this technology, the PCB board design and construction of some high-speed railways have taken many detours in combination, resulting in the technology of single-core high-speed rail power supply cable operation has not met the requirements, and has not caught up with the international level
.
According to the investigation, since 2010, 44 sudden power outage accidents of a high-speed railway in China have been caused by the breakdown of the intermediate joint, and the insulation resistance of the outer sheath of the single-core cable has not met the requirements of the national standard and caused by large-scale damage problems, cable fault point detection difficulties and water branches are also important reasons for
failure.
Imported high-speed rail cable testing equipment localized development
Localization development of imported high-speed rail cable testing equipment: localization development of imported high-speed rail cable testing equipment
In the face of the severe operation safety situation of China's long and large high-speed railways, in order to no longer allow frequent power outages in China's high-speed railways, in order to prevent China's high-speed railways from being affected by bad weather such as thunder and lightning
.
Shenzhen Longren Reverse Research Division (www.
pcbwork.
net) is a high-tech enterprise specializing in double-sided, multi-layer circuit board copying (clone board), board modification, BOM list production, reverse thrust schematic, PCB mass production, chip decryption, prototype production, SMT processing, etc.
, specializing in providing complete solutions for electronic products for domestic and foreign customers.
In order to narrow the gap between domestic products and foreign high-end technology, we have long used PCB reverse research methods to carry out localized development of imported equipment
.
In view of the current technical status of high-speed rail cable testing equipment, Longren has introduced a series of advanced high-speed rail cable testing equipment from Germany, such as cable outer sheath fault tester, wire and cable high-resistance fault locator, cable dielectric loss tester and other instruments and equipment for PCB board copying and secondary development innovation research, as shown in the figure below
.
Shenzhen Longren Reverse Research Division (www.
pcbwork.
net) is a high-tech enterprise specializing in double-sided, multi-layer board), board modification, BOM list production, backward schematic, PCB mass production, chip decryption, prototype production, SMT processing, etc.
, specializing in providing complete solutions for electronic products for domestic and foreign customers.
In order to narrow the gap between domestic products and foreign high-end technology, we have long used PCB reverse research methods to carry out localized development of imported equipment
.
In view of the current technical status of high-speed rail cable testing equipment, Longren has introduced a series of advanced high-speed rail cable testing equipment from Germany, such as cable outer sheath fault tester, wire and cable high-resistance fault locator, cable dielectric loss tester and other instruments and equipment for PCB board copying and secondary development innovation research, as shown in the figure below
Cable dissipation tester
Cable dissipation testerResearch on the performance of high-speed rail cable tester for PCB copying
High-speed rail cable tester performance study of PCB copy board, high-speed rail cable tester performance research
Studies have shown that it is very necessary to evaluate the health status of the outer sheath of the cable, which can effectively reduce the invasion of water branches and premature aging
of equipment caused by water branches.
The outstanding contribution of the cable outer sheath tester is to strictly guard the gate to prevent the intrusion of moisture that is extremely unfavorable to the operation of the cable
.
Its main functions are: outer sheath withstand voltage test, outer sheath fault prepositioning and precise positioning
.
of equipment caused by water branches.
The outstanding contribution of the cable outer sheath tester is to strictly guard the gate to prevent the intrusion of moisture that is extremely unfavorable to the operation of the cable
.
Its main functions are: outer sheath withstand voltage test, outer sheath fault prepositioning and precise positioning
.
Another portable dielectric loss tester is very suitable for the scientific evaluation of the aging state of the cable insulation layer with rated voltage 3kV-20kV, and is compatible with its brand pure sine wave ultra-low frequency 0.
1Hz AC withstand voltage test system, and can find and identify the completely aged cable to be overhauled and replaced in time from the cable equipment database after connection, so as to avoid sudden power
failure of the cable system caused by aging.
The instrument can not only detect insulation defects in advance, but also connect directly to the VLF test system to quickly measure the dissipation value of the measured object and store the results
.
1Hz AC withstand voltage test system, and can find and identify the completely aged cable to be overhauled and replaced in time from the cable equipment database after connection, so as to avoid sudden power
failure of the cable system caused by aging.
The instrument can not only detect insulation defects in advance, but also connect directly to the VLF test system to quickly measure the dissipation value of the measured object and store the results
.
Longren has successfully completed the PCB copy board reverse innovation research of this series of instruments, not only mastered the core technical data such as PCB documents, bill of materials, schematic diagrams, etc.
, but also further PCB design and development in the process of reverse research, realized rapid equipment upgrade, and at the same time played a role in "checking and filling gaps" in the shortcomings of China's high-speed rail equipment in many domestic practical applications
.
, but also further PCB design and development in the process of reverse research, realized rapid equipment upgrade, and at the same time played a role in "checking and filling gaps" in the shortcomings of China's high-speed rail equipment in many domestic practical applications
.
