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本標準規定了脈沖電子圍欄系統的環境條件、型式、基本參數和技術要求、安裝與驗收、標志、包裝、運輸及貯存、運行、使用與維護。本標準還規定了脈沖電子圍欄系統主機的技術要求、試驗方法、檢驗規則。本標準適用于脈沖電子圍欄系統。
概述GB/T 14598的本部分適用于電力系統保護所用的量度繼電器和保護裝置,包括與這些裝置一起使用的控制、監視、通信和過程接口設備。本部分規定了量度繼電器和保護裝置的電磁兼容要求。對于不含有電子電路的裝置,例如機電式繼電器,不要求做本部分規定的試驗。本部分的各項要求適用于新的量度繼電器和保護裝置,所規定的所有試驗僅為型式試驗。發射本部分規定了量度繼電器和保護裝置可能對其他設備產生干擾的電磁發射限值和試驗方法。本部分所選擇的發射限值表明了電磁兼容的要求,以確保工作在變電站和發電廠中的量度繼電器和保護裝置所產生的騷擾不會超出規定的試驗等級而妨礙其他設備的正常工作。這些試驗要求是為量度繼電器和保護裝置的外殼和輔助電源端口規定的。抗擾度本部分規定了與連續的和瞬時的傳導騷擾、輻射騷擾以及靜電放電有關的量度繼電器和保護裝置的抗擾度試驗要求。這些試驗要求闡明了電磁兼容的抗擾度要求,以確保變電站和發電廠中正常運行的量度繼電器和保護裝置具有足夠的抗擾度水平。
GB/T 20840的本部分規定了額定頻率為15 Hz~100 Hz的交流用途或直流用途的低功率互感器(LPIT)的補充通用技術要求。本產品標準以GB/T 20840.1為基礎,對相關的專項標準的條款進行了增補。本部分不包括互感器數字量輸出格式的技術規范。本部分限定了模擬量或數字量輸出的誤差。互感器數字接口的其他特性見GB/T 20840.9,并應用了變電站分層通訊結構的系列標準。本部分考慮了涉及帶寬的補充要求。諧波準確度要求和抗混疊濾波器要求列于附錄6A.4中。單相LPIT的通用框圖見圖601。依據采用的技術,并非圖601列出的所有部件皆為互感器必不可缺的。例如,對于無源低功率互感器(不包含有源電子器件的LPIT),各框塊僅由無源元件構成且無電源。
本標準規定了通信設備用直流遠供電源系統(以下簡稱遠供系統)的術語和定義、組成和分類、要求、試驗方法、檢驗規則,以及標志、包裝、運輸和貯存。本標準適用于通過電力電纜、通信電纜進行直流電能遠距離傳送和接收的供電系統。本標準不適用于采用TNV電路供電的遠供系統。
This Recommendation specifies the system architecture (SA) and customer premises equipment (CPE) architecture forthe delivery of video, data and voice services across a VDSL access network to an in-home environment, known as aFull Service VDSL network
This European Standard specifies requirements of electrical and mechanical design, installation,maintenance and testing procedures for advanced visual docking guidance systems.
This part of IEC 61131 specifies requirements and related tests for programmable controllers(PLCs) and their associated peripherals (for example, programming and debugging tools(PADTs), human-machine interfaces (HMIs), etc.) which have as their intended use thecontrol and command of machines and industrial processes.PLCs and their associated peripherals are intended to be used in an industrial environmentand may be provided as open or enclosed equipment. If a PLC or its associated peripheralsare intended for use in other environments (light industrial, commercial, residential), then thespecific requirements, standards and installation practices for those other environmentsshould be additionally applied to the PLC and its associated peripherals.This standard also applies to any products performing the function of PLCs and/or theirassociated peripherals.Equipment covered in this standard is intended for use in overvoltage category II (IEC 60664-1)in low-voltage installations, where the rated equipment supply voltage does not exceed a.c.1 000 V r.m.s. (50/60 Hz), or d.c. 1 500 V. (If PLCs or their associated peripherals are appliedin overvoltage category III installations, then additional analysis will be required to determinethe suitability of the equipment for those applications.)This standard does not deal with the functional safety or other aspects of the overallautomated system. PLCs, their application programme and their associated peripherals areconsidered as components of a control system.Since PLCs are component devices, safety considerations for the overall automated systemincluding installation and application are beyond the scope of this standard. Refer toIEC 60364-1 or applicable national/local regulations for electrical installation and guidelines.However, PLC safety as related to electric shock and fire hazards, electrical interferenceimmunity and error detecting of the PLC-system operation (such as the use of parity checking,self-testing diagnostics, etc.), are addressed.This standard also specifiesa) service, storage and transportation requirements for PLCs and their associatedperipherals (Clause 4);b) functional requirements for PLCs and their associated peripherals (Clause 5);c) EMC requirements for PLCs and their associated peripherals (Clause 8);