RATING OP ELECTRICAL MACHINERY 



Commutators . . 60 



Bearings 



ton. paper and its preparation*. Uoeo. 

 '.c or similar material*: 



stance). 60 



Moving coiU no-couple) . . . 



SWEDEN. For stationary windings. 10 per cent above the limit* (or 



. 



In^ i ton BO 



paper '*> 



mica, asbestos . 



O rtpUtt 



mmtator* . . . '" 



Bearing 



I KH. 



nature windings. 



Commutators anl brushes .'." 



Bearings and other parts . 40 



~Porlar*maohhM.a Umpwatar* limit of 404*. cart, wrtw rated Ioa4 

 condition* and 55 d. *m. muter ovwtoad u (r*qontly K~ct<U.1. 



5* rro* </!{ dir Ttmptrature 



(At th oooMMMMMnt of *ch pra<rph th ftur in d. ctt. tedfealM tW 

 tandard adopted a* the room tempcrmturc.) 



35 deg. cent. Thr temperature to be adopted is the mean of the thcr- 



momo at regular intervals during the last quarter of the 



n the currents of air passing to the apparatus, or. in default, at the 



.;ht round the apparatus; in any case, as near as possible at 



a minimum distance to ensure safety from the effects of direct radiation. 



FIANCE. 



35 deg. cent. The thermometer indicating the surrounding air shall be 

 placed in the line of -;ts at about one metre from the machine and 



red from all external influence. The mean value of the figures 

 during the last quarter of the test shall be adopted. 



35 deg. cent. The temperature of the surrounding air shall be ta/ 

 : rents of air arriving, or, if there is no well-defined current of a 

 value shall be taken of the air surrounding the machine at the 

 middle height and at about one metre distant from the machine. The 

 mean value of the figures during the last quarter of the test shall be 

 .1 top* 1 

 GREAT BEIT A: 



25 deg. c 

 SWEDEN. 

 35 deg. cent. 



i ED STATES. 



25 deg. cent. The surrounding air of the test room is to be ascer- 

 tained by means of several thermometers protected from direct radiation 

 and air currents. 



'if at Cornel ustom of Overload Ttst 



BELGIUM. After the application of an overload of 20 per cent for one- 

 fifth of the specified test period and of 40 per cent for three minutes, the 

 prescribed limits of temperature must not be exceeded by more than 

 10 deg. cent. 



FRANCE. No conditions as to heating. 



