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1. |
Record Nr. |
UNISA996279750303316 |
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Titolo |
ANSI/IEEE Std 56-1977 : IEEE guide for insulation maintenance of large alternating-current rotating machinery (10 000 kVA and larger) / / Institute of Electrical and Electronics Engineers |
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Pubbl/distr/stampa |
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Piscataway, New Jersey : , : IEEE, , 1977 |
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ISBN |
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1-5044-0675-3 |
0-7381-3956-4 |
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Descrizione fisica |
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Disciplina |
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Soggetti |
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Electric insulators and insulation |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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The purpose of this IEEE guide is to present information necessary to permit an effective evaluation of the insulation systems of large alternating-current rotating electrical machines. Such an evaluation can serve as a guide to the degree of maintenance or replacement which might be deemed necessary, and also offer some indication of the future service reliability of the equipment under consideration. The guide is intended to apply in general to large alternating-current rotating electrical machines rated at 10000 kVA or more, and operating at voltages of 6000 V and above. |
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2. |
Record Nr. |
UNISA996279747903316 |
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Titolo |
ANSI/IEEE Std 802.2-1985 : IEEE Standard for Information Technology - Telecommunications and Information Exchange Between Systems - Local and Metropolitan Area Networks - Specific Requirements / / Institute of Electrical and Electronics Engineers |
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Pubbl/distr/stampa |
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Piscataway, USA : , : IEEE, , 1989 |
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ISBN |
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Descrizione fisica |
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1 online resource (114 pages) |
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Disciplina |
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Soggetti |
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Local area networks (Computer networks) |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Sommario/riassunto |
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This standard is part of a family of local area network (LAN) standards dealing with the physical and data link layers as defined by the ISO Open Systems Interconnection Reference Model. It describes the functions, features, protocol, and services of the logical link control (LLC) sublayer, which constitutes the top sublayer in the data link layer of the ISO 8802 Local Area Network Protocol. The services required of, or by, the LLC sublayer at the logical interfaces with the network layer, the MAC sublayer, and the LLC sublayer management function are specified. The protocol data unit (PDU) structure for data communication systems is defined using bit-oriented procedures, as are two types of operation for data communication between service access points. In one type of operation, PDUs are exchanged between LLCs without the need for the establishment of a data link connection. In the other, a data link connection is established between two LLCs prior to any exchange of information-bearing PDUs. |
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