RATING OF ELECTRICAL A/.U 7//.\ h.RY 



Und lous workinf. nJ at any load within the prescribed 



hail be such as to require at ten* 



r lubric.r r vaU of twelve hour*. Thit 



cleaning 'y at i 



also applies to collector rings. 



Oik "nder all conditions of load from one quarter up to the 



load, and wit 

 ng produced must be so negl 



-ing attention. The 

 brushes to be grun<l m in the most favorable position. 



VI lUlI MS 



Swi : rwise specified, the commutation is to U 



out appreciable pr overload, and with* 



brushes bring alt- 



In the case of ma. 1 :>g. the position of the brashes 



may be altered. The working j> rushes is to be indicated. 



ist carry the specified overload 

 us sparking or mechanical weakness. 



OVERLOAD 



percentages given below imply an overload in excess of the rated 

 load marked on the name-plate. 



BEL- -r continuous service. 20 per cent of the rated load for 



<>d equal to one-fifth of the duration of the heating test, with a 

 max i nun: .ur. 



unttent service. 20 per cent of the rated load for one-fifth 

 of an hour. 



For momentary service. 20 per cent of the rated load for a period 

 equal to or marked on the name-plate. 40 per cent of 



ted load for 3 inn. 



t to be applied at the close of the rated load test. 



All mat ' be capable of withstanding, without deterioration 



or au{ .f the rated load for one-tenth of 



M of the test for continuous working; 30 per cent of the rated 



load for 5 minutes. 



tent service: 25 per cent of the rated load : 

 minutes; 30 per cent of the rated load for 5 minutes. 



GERMANY. For generators and motors: 25 per cent of the rated 

 load for half an hour. 



>n (constant potential) : 40 per cent of the rated loa : 

 minutes. 



M HKI i MS , , 11 f Mint <^ Conclusion of OttrtoaJ 1 

 SWEDEN. 25 per cent in excess of the rated current without injurious 

 sparking. Adjustment of brushes permitted. 



i ED STATES. For generators: 25 per cent of the rated load 

 '. u 



motors (continuous working): 25 per cent of the rated load for 

 2 hours; 50 per cent of the rated Toad for 1 minute. 



Norss. Bsumrn. Tbt machine matt b* capable of MUbrintf t k una 



UN MtiUd pori I --...,-, . --.,. . . 



-. cloM of UM rmted load te.t . In which c** UM rtor te temperature mat act eareed 

 the limits pmcnbed for UM rated IOM! by nor* than 10 d. eU 



For motors intended to work for prolonged period*. M owrload irt of 40 pv <rt for 

 three mtouu. 



All motor* mart be ctptbte of withMaMJat M iocrr**. of 90 ptr 

 for .period of fiv mioatM. 



The owrkMd twt b to be pplted without rvferm 

 n*e. And it r^iifl be commenced with ttM nit^fne At toch a tejnponk 



" mil Trill innil. gwamln mi In niiiMi uf 



with an overlod oTlS percent 



