RATING OF ELECTRICAL M .1(7/7 \KRY 



GERM 



Intfrmitltnt service. One hour. 



Momentary service. The number of hours indicated on the name-plate. 



Continuous service. Ten h< 



In the case of small m he duration of test may be reduced. 



GREAT BRITAIN 



Continuous working. Six hours (up to 1,000 kw.). 



Intermittent working. One hour (under revision). 



Continuous service. A period sufficiently long to attain a pract 

 constant temperat 



KS. 



inuous sfn-itc. .\ period suftuimtly long to attain a practically 

 constant temperat r 



Intermittent srrrnr. Affording to the conditions <:' -pecified. 



Limtts of Temperature Kt.^c in Deg. Cent. 



BELGIUM. 



(i) Permissible limits. (11) Recommended limits. (i) 



ulated with cotton 50 45 



paper 60 i:. 



* mica, asbestos or similar preparations. . . 80 



Commutators, brushes . 60 50 



Bearings, terminals and connections 35 30 



For permanently short-circuited windings, 5 degrees rise in excess 

 of the above limits is permi* 

 FRANCE. 



Continuous service. For stationary windings, 10 deg. cent, in excess 

 of the limits for moving coils, 

 ng coils: 



Insulated with cotton ."() 



paper 



a mica, asbestos or equivalent preparations 80 



Iron and ^are conductors 90 



Commutators ' ' 



Bearings 



Intermittent service. In conformity with the regulations of tin- Milan 

 Congress (see Appendix /). 



Uninterrupted service. For commutating machines destined for an 

 uninterrupted day and night service, the permissible temperature 

 shall be in accordance with those for continuous service, reduced by 5 deg. 

 cent. 



Association Alsacienne. 



(a) For field windings traversed by a continuous current: 



By resistance 



By thermometer ! ' 



(6) For all other windings and the iron in which the windings are 



embedded. . -l " 



For permanently short-circuited windings 55 



(d) For comrruitators, brushes 50 



(e) For bearings, terminals and connections 



N. B. For enclosed machines, an extra rise of 5 degrees may be permitted. 

 For commutating machines destined to work day and night continuously the above 

 limits of temperature shall be reduced by 5 degrees. 



GERMANY. For stationary windings 10 deg. cent, above the limits for 

 moving coils is permitted. 



moving coils as well as the iron in which the windings are embedded: 



Insulated with cotton 50 



" under oil and paper ... .60 



enamel, mica, asbestos or equivalent prepara- 

 tions 80 



