Download Advanced Information Systems Engineering: 4th International by Simon McGinnes (auth.), Pericles Loucopoulos (eds.) PDF

By Simon McGinnes (auth.), Pericles Loucopoulos (eds.)

The becoming call for for info structures of ever-increasing dimension, scope, and complexity has highlighted the advantages that could be collected from methods which realize the interrelationships among varied technological strands within the box of knowledge structures. commonplace examples of those components contain: procedure improvement equipment, CASE, requisites engineering, database layout, and re-use. The CAiSE sequence of meetings offers the discussion board for the trade of effects and ideas inside of those diversified technological spheres from a unmarried viewpoint, particularly that of knowledge platforms improvement and administration. The 1992 convention, the fourth within the sequence, maintains this custom. This quantity collects the papers authorised for the convention, with authors from sixteen international locations overlaying quite a lot of issues together with: object-oriented research and layout tools, the improvement procedure and product aid, necessities engineering, re-use, layout ways, and deductive approaches.

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Read or Download Advanced Information Systems Engineering: 4th International Conference CAiSE '92 Manchester, UK, May 12–15, 1992 Proceedings PDF

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Additional resources for Advanced Information Systems Engineering: 4th International Conference CAiSE '92 Manchester, UK, May 12–15, 1992 Proceedings

Example text

Turns ratio c. Impedance ratio d. 2 DESCRIBE the differences between a wye-connected and delta-connected transformer. 3 Given the type of connection and turns ratios for the primary and secondary of a transformer, CALCULATE voltage, current, and power for each of the following types: a. ∆-∆ b. ∆-Y c. Y-∆ d. 4 STATE the applications of each of the following types of transformers: a. Distribution b. Power c. Control d. Auto e. Isolation f. Instrument potential g. Instrument current Rev. 0 Page v ES-13 Transformers Intentionally Left Blank ES-13 Page vi Rev.

The transformer windings may be connected to form a 3φ bank in any of four different ways (Figure 5). Figure 5 3φ Transformer Connections Figure 5 shows the voltages and currents in terms of applied line voltage (V) and line current (I), where the turns ratio (a) is equal to one. Voltage and current ratings of the individual transformers depend on the connections (Figure 5) and are indicated by Table 1 for convenience of calculations. Rev. 0 Page 9 ES-13 TRANSFORMER THEORY Transformers TABLE 1: Voltage and Current Ratings of Transformers Primary Transformer Connection (Primary to Secondary) Volt.

Delta Connection . . . . . . . . . . . . . . . Wye Connection . . . . . . . . . . . . . . . Combinations of Delta and Wye Transformer Connections Transformer Losses and Efficiency . . . . . . . . Transformer Operation Under No-Load . . . . . . . Coil Polarity . . . . . . . . . . . . . . . . Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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