This standard specifies the required characteristics for three-pole temperature compensated circuit breakers of current ratings from (0,5 to 25)A. These circuitbreakers are operated by a single push-pull button with trip-free release, delayed tripping and are explosion proof. Their operation is ensured up to short circuit current.
Tämän julkaisun valmistelusta Suomessa vastaa SFS Suomen Standardit, puh. 09 149 9331.