Download Comparison of Principal Points of Standards for Electrical by Dipl.-Ing. Friedrich Nettel (auth.) PDF

By Dipl.-Ing. Friedrich Nettel (auth.)

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Extra resources for Comparison of Principal Points of Standards for Electrical Machinery (Rotating Machines and Transformers)

Example text

C 00 w I I20000 + ' Auto Trans-j former Transf. ) windings primary 2000 Volts and above 10000 5°00 I same as apparatus to wh ich connected I 2 E+ 1000 primary I less than I 2000 Volts Auto Transformer A. C. single phase permanently grounded (not 3-phase with earthed neutral) I - over 300 Volts 2,73 E' + 1000 same as apparatus to which connected of circuit to ground E' voltage ! E represents: Note: Note: The rated terminal pressure when testE represents the normal voltage of ing individual windings against core.

C. side are i pressure test, to be tested i with 5°001 I ResisMachines for Tropical con- unless the Rated field windtance ditions or other cases where ingsarepropressure Megohm the air temperature is in excess vided witha - - - -_.. -- --- - - -, -of 35 0 C (the permissible Tem- "breakup" switch,or 0,25 perature rises as above) are to _ will always be reduced by 20010 except for be short cirabove i Mica, Asbestos and fire proof cuited at 350 Volts : starting materials. r;~s:r~_J , Appendix to Section I (Rotating Machines).

A1so for Substation macbines. Transformers. A. Britain a) Standard- and max, permissible Temperatures of Cooling Media. Normal I 200 C - 95 ° C Iadopted)900C - Max. permissible air Max. permissible water Max , permissible oll (provisionally 90° C b) Determination of End-Temperatures and Temperature Rises. Heating Test. 7. 1 The Heaiing Test shall be carried out at As one page As on page 7. A' bl st i Further: agncultural ranng : Ir a . . , For Tis wlth continuous rating until the Correction ot formers.

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