Cahier technique no 158
Cahier Technique Schneider Electric no 158 / p 6 cphase-to-phase (15 of faults) This type of fault often degenerates into a three-phase fault; cthree-phase (only 5 of initial faults) These different short-circuit currents are presented in figure 5 Consequences of short-circuits The consequences are variable depending on
Technical collection Cahier technique no 207
Cahier Technique Schneider Electric no 207 / p 4 1 Three-phase asynchronous motors This section covers 3-phase asynchronous motors, the most commonly used motors for driving machinery The use of this type of motor has become the norm in a large number of applications because of its numerous advantages: it is standardized, rugged, easy to
Cahier technique no 83
Cahier Technique Schneider Electric no 83 / p 6 It is observed from the vector diagram (see fig 2 ) that I′ 1 has a higher value than I1 and is out of phase, in front of I1, a vector considered to be in phase with the voltage U existing between the extremities of the 3 elements which are at the same potential In the same way, in element 3: ′
Technical collection Cahier technique no 141
Cahier Technique Schneider Electric no 141 / p 6 In France v On EHV networks (400 and 225 kV), various reclosers are used: - slow single-phase reclosers tripping in event of single-phase faults: breaking time is around 1 5 to 2 s, - slow three-phase reclosers (multiphase faults), whose operation depends on voltage
Technical collection Cahier technique no 202
Cahier Technique Schneider Electric no 202 / p 5 1 3 3-phase loads Consider a symmetrical, balanced, non-linear 3-phase load without neutral connection, as shown in figure 4 Assuming that the currents drawn by this load include the third harmonic, the third order harmonic currents of each phase can be written as follows: i sin 3 t r3 =I3 ω i
Cahier technique no 152 - spec-instalacijeetfrs
"Cahier Technique" or the list of available titles The "Cahiers Techniques" collection is part of the Schneider Electric’s "Collection technique" Foreword The author disclaims all responsibility subsequent to incorrect use of information or diagrams reproduced in this document, and cannot be held
Technical collection Cahier technique no 213
Cahier Technique Schneider Electric no 213 / p 3 Calculations for LV and HV networks This Cahier Technique publication is intended to provide a general overview of the main electrotechnical calculations carried out in engineering studies on electrical systems at all voltage levels
Technical collection Cahier technique no 203
“Cahier Technique” or the list of available titles The “Cahiers Techniques” collection is part of Schneider Electric’s “Collection Technique” Foreword The author disclaims all responsibility subsequent to incorrect use of information or diagrams reproduced in this document, and cannot be held
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