read it now if u want to know more on circuit breaker

hey guy 
Now u can see  why there is a mcharacter front of breaker  ampacity
Just like  B16,C32 and so on


WWWWWAAAAAAAAAA                 Tooooooooo         Easy

Type
Instantaneous tripping current
B
above 3 In up to and including 5 In
C
above 5 In up to and including 10 In
D
above 10 In up to and including 20 In
K
above 8 In up to and including 12 In
For the protection of loads that cause frequent short duration (approximately 400 ms to 2 s) current peaks in normal operation.
Z
above 2 In up to and including 3 In for periods in the order of tens of seconds.
For the protection of loads such as semiconductor devices or measuring circuits using current transformers.


Now u see
type is the charaster front of breaker rating
and  
Instantaneous tripping current is the tripping current of breaker





invest in your brain

posted by me,waagyi
ref  from wiki eng







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