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Conditions to Accomplish a Well Defined Electrical Environment in Order to Achive a General Lightning Protection for Electronic Equipments 为实现电子设备的一般防雷，实现良好电气环境的条件
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794317
Christer Bohlin
{"title":"Conditions to Accomplish a Well Defined Electrical Environment in Order to Achive a General Lightning Protection for Electronic Equipments","authors":"Christer Bohlin","doi":"10.1109/TELESC.1994.4794317","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794317","url":null,"abstract":"If the plant itself is struck by lightning, it is of course destructed in one way or the other. But even a lightning which strikes far away from the plant can result in damages due to overvoltags which are entering the plant via the connected wire systems. This is the reason why strokes of lightning outside the plant is of great importance, as they occur more often than direct hits by the lightning.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129195787","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
Modernization of the Czech Telecommunication Network; Design parameters for buildings and air-conditioning systems 捷克电信网络现代化;建筑和空调系统的设计参数
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794357
M. Riha
{"title":"Modernization of the Czech Telecommunication Network; Design parameters for buildings and air-conditioning systems","authors":"M. Riha","doi":"10.1109/TELESC.1994.4794357","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794357","url":null,"abstract":"to introduce ISDN services, value-added services and other services immediately after the standardiza tion has been completed. The cost of realizing this plan is estimated at 130.000 million. Kc (Czech currency). First telecommunication proiect Besidedetailing a strategicplan, thefirsttelecommunication project was developed to form the implementation plan for the years 1992-1995. This plan serves as a toundation for:","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123027569","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
18 kW Switch Mode Rectifier Circuit Topology 18kw开关整流电路拓扑
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794343
W. Solter, N. Berg
{"title":"18 kW Switch Mode Rectifier Circuit Topology","authors":"W. Solter, N. Berg","doi":"10.1109/TELESC.1994.4794343","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794343","url":null,"abstract":"According to (2), rectifiers for telecommunication power supplies with BE circuits are graded in 7 classes that permit total input current harmonic distortion of less 60%, 45%, 35% and 10%. The 2-20 JkVA ratings that can be connected to 400 V call for harmonic distortions less than 45% and 35% for the line input current at 3-25 kVA. Ratings up to 50 kVA may generate harmonics of 10% maximum or they must be connected to a separate medium-voltage transformer.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115650185","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
Changes in Power Supply Systems 电力供应系统的变化
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794327
M. James
{"title":"Changes in Power Supply Systems","authors":"M. James","doi":"10.1109/TELESC.1994.4794327","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794327","url":null,"abstract":"Over the past twenty years there have been significant alterations to large UPS systems and similar changes have taken place on DC power systems for telecommunications. Both have electronic circuits to condition the power and batteries to supply the energy in the event of mains failure. In the early days it was generally the policy to back up the whole, building when a UPS was employed. The incoming supply was connected via the UPS which was normally housed in a special room located in the basement. The 48 volt power supplies for telecoms, were similarly located with large busbars to distribute the current which often involved thousands of amps. The batteries employed were wet cells which required special ventilation and regular maintenance.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125500452","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
Compact Power Plants as an Economical and Reliable Standby Power Supply 紧凑型电厂作为一种经济可靠的备用电源
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794316
P. Rajala
{"title":"Compact Power Plants as an Economical and Reliable Standby Power Supply","authors":"P. Rajala","doi":"10.1109/TELESC.1994.4794316","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794316","url":null,"abstract":"Valmet Corporation has manufactured diesel generating sets as various configurations over 40 years and it is one of the field's largest manufacturer in Scandinavia. In the 1980's Valmet developed a new series of diesel generating sets called Series V as well as compact power plants which has brought new potential for standby power. As an indication of innovation a patent has been issued for this new diesel generating set in all the countries it has been applied for. The compact power plant as specified in this paper is meant for the outputs up to 250 kVA. In this output range it will give certain technical and economical advantages. To be economical the plant must go in a small room and the installation, commissioning and maintenance must be easy. The above-mentioned requirements led into a modular configuration. All the modules needed in the plant are manufactured in advance as a series production which means savings in costs and also as is well known improves the reliability of the whole plant, because there is no need for improvisation, in the machinery room at the installation stage. Thanks to the modular configuration and for the reason that the plant is ready-adjusted, set and test-run at the factory the commissioning is easy. In the compact power plant the diesel engine is installed above the generator. The power transmission from engine to generator is achieved by a toothed belt.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125243333","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
Battery Maintenance System Battcheck 电池维护系统Battcheck
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1994-04-01 DOI: 10.1109/TELESC.1994.4794338
F. Richter
{"title":"Battery Maintenance System Battcheck","authors":"F. Richter","doi":"10.1109/TELESC.1994.4794338","DOIUrl":"https://doi.org/10.1109/TELESC.1994.4794338","url":null,"abstract":"This test data shecet will be transferred to thie MemoCard. The MemoCard is now available withi all general data for the BattChieck. Thie card as small as a chieque card is then inserted into BattCheck. Now all rated values of the battery system are available for the m-ainteniance. After the maintenance is conicluded, thie measuired data will be transferred to the MemoCard. As data of abt. 1000 cells can be stored on the MemoCard, a combination of more units is possible (e. g. all batteries of onie customecr).","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125340008","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
PDF Not Yet Available In IEEE Xplore PDF尚未在IEEE explore中提供
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1900-01-01 DOI: 10.1109/p2p.2013.6688691
{"title":"PDF Not Yet Available In IEEE Xplore","authors":"","doi":"10.1109/p2p.2013.6688691","DOIUrl":"https://doi.org/10.1109/p2p.2013.6688691","url":null,"abstract":"The document that should appear here is not currently available.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131157129","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
Regional Telekom Offices and their Duties 区域电信局及其职责
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1900-01-01 DOI: 10.1109/telesc.1994.4794349
{"title":"Regional Telekom Offices and their Duties","authors":"","doi":"10.1109/telesc.1994.4794349","DOIUrl":"https://doi.org/10.1109/telesc.1994.4794349","url":null,"abstract":"","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"47 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120850570","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
Free Maintenance Lead Acid Batteries in Telecommunication Application 免维护铅酸蓄电池在电信中的应用
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1900-01-01 DOI: 10.1109/telesc.1994.4794378
{"title":"Free Maintenance Lead Acid Batteries in Telecommunication Application","authors":"","doi":"10.1109/telesc.1994.4794378","DOIUrl":"https://doi.org/10.1109/telesc.1994.4794378","url":null,"abstract":"The free maintenance batteries used on telecommunicator applications belong to the very new models produced on that aim. Those are stationary lead acid batteries with grid type pasted. We have used alloys with a reduced content of stibium (less than 2 precentes) and an addition of Selenium (1.25%) in the producing process of the positive and negative grills of those batteries. The active mass was obtained in accordance with usual technologies. The innovation consists in the utilization of the perchloric acid salts and of the another anorganic compound named \"S\" - both as additions to electrolyte formation-working into ose batteries. The chemical reactions assumed for the electroformation in H<inf>2</inf>SO<inf>4</inf> + HCl0<inf>4</inf> mxied electrolyte are the followings: Pb<sup>2+</sup> + SO<sup>2-</sup><inf>4</inf> PbSO<inf>4</inf> (1) PbSO<inf>4</inf> + 2H<inf>2</inf>O PbO<inf>2</inf> + H SO<sup>-</sup><inf>4</inf> + 3H<sup>+</sup> + 2e (2) PbSO<inf>4</inf> + 2H<sup>+</sup> + 2e Pb + 2H<sup>+</sup> + SO<sup>2-</sup><inf>4</inf> (3) PbO<inf>2</inf> + Pb + 4HClO<inf>4</inf> 2Pb(ClO<inf>4</inf>)<inf>2</inf> + 2H<inf>2</inf>O (4) Pb(ClO<inf>4</inf>)<inf>2</inf> + H<inf>2</inf>SO<inf>4</inf> PbSO<inf>4</inf> + 2HClO<inf>4</inf> (5) The compound \"S\" added to the mixed electrolyte H<inf>2</inf>SO<inf>4</inf> + HClO<inf>4</inf> has the role of removing the defavorable effects which can occur as a result of the existance of th HClO<inf>4</inf> marks into the active mass pores. The fig. 1 and 2 presents the compotament at the polarisation of the alloys used for the grill making of the free maintenace lead-acid batteries in telecommunication application.","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131475793","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
How to Buy Power Supply Equipment and Standby Generators - The European Market 如何购买电源设备和备用发电机-欧洲市场
TELESCON '94 - The First International Telecommunications Energy Special Conference Pub Date : 1900-01-01 DOI: 10.1109/telesc.1994.4794350
{"title":"How to Buy Power Supply Equipment and Standby Generators - The European Market","authors":"","doi":"10.1109/telesc.1994.4794350","DOIUrl":"https://doi.org/10.1109/telesc.1994.4794350","url":null,"abstract":"","PeriodicalId":178715,"journal":{"name":"TELESCON '94 - The First International Telecommunications Energy Special Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128475895","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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