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The primary protection against lightning of a microwave station in a high keraunic level area 高辐射量地区微波站防雷的初级防护
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171265
M. Sevrin
{"title":"The primary protection against lightning of a microwave station in a high keraunic level area","authors":"M. Sevrin","doi":"10.1109/INTLEC.1990.171265","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171265","url":null,"abstract":"Reliable and efficient protection against lightning for sophisticated telecommunication networks installed in high keraunic level areas is described. For microwave stations, its main features are: (1) the tower collects the lightning stroke on a specific point, splits it up, and allows it to flow through its structure without any independent lightning conductor; (2) the earthing network is unique, meshed, and equipotential, it does not include a ground well, and its resistivity plays a secondary role; and (3) the building, through its reinforced bars, is a part of the protection.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134325021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The challenge of powering emerging services (optical fiber networks) 为新兴业务(光纤网络)提供动力的挑战
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171239
R. Snelling
{"title":"The challenge of powering emerging services (optical fiber networks)","authors":"R. Snelling","doi":"10.1109/INTLEC.1990.171239","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171239","url":null,"abstract":"Summary form only given. Power supplies for fiber optic networks are discussed. Three ways to provide power in a fiber system are mentioned. Most of these architectures can be implemented in numerous ways. One way to provide power is to extend copper along with the optical fiber, either within the same or an external sheath. This system allows power to be provided by remote or central office terminals. In this scenario, batteries and charges are located in the remote terminal or controlled environment vault. Another method terminates the fiber at the curb, or just short of the living unit and back-feeds power from the subscriber cluster to the pedestal to power the optical network interface and maintain the backup power system. The third architecture extends fiber all the way to the living unit where local power is required for the subscriber's equipment.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127585850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Benefits of computerized power management 计算机化电源管理的好处
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171258
R. Heron
{"title":"Benefits of computerized power management","authors":"R. Heron","doi":"10.1109/INTLEC.1990.171258","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171258","url":null,"abstract":"In 1983, a microprocessor-based data acquisition unit was first installed in a Bell Canada site to remotely monitor a -48 V DC power plant. Since that time, the technology of such units has evolved, and their use has become widespread throughout the company. The evolution of computer-aided power management at Bell Canada is reviewed, and some of the numerous advantages and savings are identified. The benefits include: reduced travel time, increased accuracy in the provisioning of power equipment, increased information on battery condition based on performance during power failures, possible delayed battery replacement beyond prescribed lifespan, automatically equalized batteries, and increased troubleshooting information.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115801261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Modular integrated power system 模块化综合电力系统
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171234
E. Dikaitis
{"title":"Modular integrated power system","authors":"E. Dikaitis","doi":"10.1109/INTLEC.1990.171234","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171234","url":null,"abstract":"The development of the Northern Telecom modular integrated power systems (MIPS) concept is described. The key issues related to the co-location of power, switching, and transmission equipment are addressed. The simplicity of the grounding of the distributed power is described in comparison with the complex and unmanageable grounding of the centralized power systems. The desirable reduction of the AC influence on the switches is also discussed.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115315799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integration of telecom energy systems into network management models using remote intelligent supervision, monitoring, and control 利用远程智能监督、监控和控制，将电信能源系统集成到网络管理模型中
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171259
L.E. Wessler
{"title":"Integration of telecom energy systems into network management models using remote intelligent supervision, monitoring, and control","authors":"L.E. Wessler","doi":"10.1109/INTLEC.1990.171259","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171259","url":null,"abstract":"The integration of telecom energy systems within today's evolving definition of network management systems (NMSs) is discussed, emphasizing the viewpoint of the various generic network management centers (NMCs) in an attempt to determine where telecom energy systems fit into NMSs and the telecommunications management network (TMN). As the levels of key competent network support system (NSS) personnel continue to dwindle, companies are being forced to install mechanized systems to meet today's required performance levels of per capita personnel effectiveness. The author categorizes the evolving staffing levels of NSS personnel, identifies the specialized needs of each user station type, and correlates that information with the design requirements of the evolving mechanized network management systems.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120864376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selection and application of ringing generators 振铃发生器的选择与应用
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171310
R. Pavelka
{"title":"Selection and application of ringing generators","authors":"R. Pavelka","doi":"10.1109/INTLEC.1990.171310","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171310","url":null,"abstract":"The selection of a ringing generator is sometimes a frustrating and somewhat haphazard guessing game due to a lack of familiarity and experience by the person responsible for the choice. The author describes a logical process to simplify the selection of central office and controlled environment vault (CEV) ringing generators based on available input power source, output frequency and power capacity, operating temperature range, and whether single or redundant generators will best meet the needs of the served load. Additional information is presented, and guidelines are given to assure that the selected generator will be correctly installed. Input feeder size and fusing, output return connection, output distribution fusing, and mounting location are discussed. The selected generator will perform as expected with a minimum of subscriber trouble reports.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121185723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prediction of remaining battery discharge time in telecommunications systems 电信系统中电池剩余放电时间的预测
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171301
T. Matsushima, S. Ishizuka, M. Hashiwaki
{"title":"Prediction of remaining battery discharge time in telecommunications systems","authors":"T. Matsushima, S. Ishizuka, M. Hashiwaki","doi":"10.1109/INTLEC.1990.171301","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171301","url":null,"abstract":"A telecommunications power system is always equipped with a standby power source, usually rechargeable lead acid batteries. However, predicting the remaining discharge time during the course of actual battery discharge has not yet been attempted. The authors introduce and demonstrate a useful calculation method, in which the load current profile is divided into equal short time units. This allows the total reserve time of the battery to be calculated by deducting the integrated amount of electricity in ampere-hours from the available ones. Then, the remaining discharge time can be calculated by subtracting the elapsed time during AC failure. In the integration process, the amount in each time unit is transformed into a value equivalent to a 10-hour rate discharge by using the coefficient introduced in this study. This method is examined by applying it to several load current profiles including actual ones from telephone offices, and the results show prediction error to be +or-5%.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128023811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Accelerated life testing of valve-regulated lead-acid batteries 阀控铅酸蓄电池加速寿命试验
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171288
D. Reid, N. Tullius, I. Glasa
{"title":"Accelerated life testing of valve-regulated lead-acid batteries","authors":"D. Reid, N. Tullius, I. Glasa","doi":"10.1109/INTLEC.1990.171288","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171288","url":null,"abstract":"Testing of valve-regulated lead-acid (VRLA) batteries presents problems not encountered in the testing of flooded batteries. These include: dryout (loss of water from electrolyte) due to normal valve operation, valve deterioration, and diffusion through the case; lack of access to the electrolyte for polarization measurements; and inability to monitor growth of plates during testing. The authors accommodate these problems by: weighing the cells to determine loss of water and establish the extent of dry-out; adding controlled amounts of water to the cells under test; performing Tafel tests; fitting pressure transducers and monitoring cell pressure; and conducting detailed autopsy on failed cells after testing. The perceived benefits of conducting high temperature accelerated life tests are discussed.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128516300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A power-factor improved AC to DC converter 一种功率因数改进的交直流变换器
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171232
K. Kuwabara, M. Kohsaka
{"title":"A power-factor improved AC to DC converter","authors":"K. Kuwabara, M. Kohsaka","doi":"10.1109/INTLEC.1990.171232","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171232","url":null,"abstract":"A new AC-to-DC converter is described which improves the power factor of the AC input line. The converter is composed of a forward converter and a flyback-derived voltage-commutated circuit. When the switching transistor is on, the induced voltage across the transformer is applied to the inductor of the feedback circuit, and energy is stored. When the input voltage is high, the voltage across the capacitor of the feedback circuit does not commutate to the input, while when the input voltage is low, the voltage across the capacitor of the feedback circuit is commutated to the input side capacitor. Therefore, the time duration of the input current is longer than the conventional one, and the power factor is improved. Analysis of the converter circuit and experimental results are presented.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128592457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
The introduction of switched mode power-a change of culture 切换模式电源的引入——文化的改变
12th International Conference on Telecommunications Energy Pub Date : 1990-10-21 DOI: 10.1109/INTLEC.1990.171228
J. Alger
{"title":"The introduction of switched mode power-a change of culture","authors":"J. Alger","doi":"10.1109/INTLEC.1990.171228","DOIUrl":"https://doi.org/10.1109/INTLEC.1990.171228","url":null,"abstract":"The operational effects and experience are described of introducing switched mode power supplies, the BT Rectifier No. 160, within British Telecom over the first five years. The cultural and operational problems that occurred and their solutions are explained, as well as the changes necessary with regard to repairs, spares, and buffer stock holdings in order to meet the overall reliability requirements of the power system.<<ETX>>","PeriodicalId":264940,"journal":{"name":"12th International Conference on Telecommunications Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1990-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125760685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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