LEADER 00726nam2-22002771i-450- 001 990001352560403321 035 $a000135256 035 $aFED01000135256 035 $a(Aleph)000135256FED01 035 $a000135256 100 $a--------d--------km-y0itay50------ba 101 0 $aeng 200 1 $a<>History of Chemistry$fBy J.R. Partington 210 $aLondon$cMacmillan$d1964 300 $aVol. 4 461 1$1001000135252 610 0 $aStoria della scienza 676 $a509 700 1$aPartington,$bJonathan R.$028204 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990001352560403321 952 $a6-126.003$b$fFI1 959 $aFI1 996 $aHistory of Chemistry$9375655 997 $aUNINA LEADER 02219nam 2200385 450 001 996280649903316 005 20231020005554.0 035 $a(CKB)1000000000035419 035 $a(NjHacI)991000000000035419 035 $a(EXLCZ)991000000000035419 100 $a20231020d2004 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aIEEE guide for power system protective relay applications of audio tones over voice grade channels /$fIEEE Power Engineering Society Power Systems Relaying Committee, IEEE-SA Standards Board 210 1$aNew York, NY :$cInstitute of Electrical and Electronics Engineers,$d2004. 215 $a1 online resource (v, 42 pages) $cillustrations 311 $a0-7381-4014-7 330 $aThis document provides guidelines for applying audio tones over voice grade channels for power system relaying. Included are sections on transmitting and receiving equipment, leased voice grade channels, application principles, installation, and testing. The primary purpose of this document is to guide the power system user in applying, installing, and operating audio-tone protective relaying systems over voice grade channels. Secondly, it is to provide a reference for equipment manufacturers engaged in the design and application of relaying equipment and for telephone personnel engaged in providing telecommunications channels for audio-tone protective relay schemes. 517 $aIEEE Std C37.93-2004 (Revision of IEEE Std C37.93-1987): IEEE Guide for Power System Protective Relay Applications of Audio Tones Over Voice Grade Channels 517 $aIEEE Std C37.93-2004 606 $aProtective relays$xStandards 606 $aTelephone communication channels$xStandards 615 0$aProtective relays$xStandards. 615 0$aTelephone communication channels$xStandards. 676 $a621.317 712 02$aIEEE-SA Standards Board, 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a996280649903316 996 $aIEEE guide for power system protective relay applications of audio tones over voice grade channels$93574549 997 $aUNISA LEADER 01826nam 2200349 450 001 996280838403316 005 20231206214319.0 010 $a1-5044-0458-0 024 7 $a10.1109/IEEESTD.1962.7440747 035 $a(CKB)3710000000618981 035 $a(NjHacI)993710000000618981 035 $a(EXLCZ)993710000000618981 100 $a20231206d1962 uy 0 101 0 $aeng 135 $aur||||||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aAIEE No 91-1962 (ASA Y32.14-1962) $eAIEE Graphic Symbols for Logic Diagrams /$fInstitute of Electrical and Electronics Engineers 210 1$a[Place of publication not identified] :$cIEEE,$d1962. 215 $a1 online resource 330 $aThis Standard represents the progress made to date in evolving graphical symbols for use in preparation of logic diagrams for systems of binary-state devices. The Standard contains two alternate but overlapping sets of symbols. Since agreement on a common set of symbols could not be obtained, no preference is implied between the two sets presented herein. This represents a solution that seems best under circumstances that presently prevail. It is anticipated that the Standard will be reviewed at the Task Group level at regular intervals, and eventually agreement will be sought for a set of graphical symbols based on a common symbology. It is hoped that groups that have not been represented heretofore will participate at Task Group level in the preparation of future revisions. 517 $aAIEE No 91-1962 606 $aLogic diagrams 615 0$aLogic diagrams. 676 $a160 801 0$bNjHacI 801 1$bNjHacl 906 $aDOCUMENT 912 $a996280838403316 996 $aAIEE No 91-1962 (ASA Y32.14-1962)$93645971 997 $aUNISA