Miniature Circuit Breaker (MCB) single-line symbol attributes

As shown in the image, optionally we see in the single line symbol each MCB of our project
  • The letter of the tripping characteristic curve (A, B, C, D, K, G)
  • Common practice is to prefix the letter of the characteristic curve before In
    eg "B10A" means MCB with In=10A and curve B (magnet current 3-5*In)
  • The rated breaking capacity (Icn) in kA
Combination 1
Combination 2
Combination 3
Combination 4

Miniature Circuit Breaker (MCB) single-line symbol attributes

As shown in the image, optionally we see in the single line symbol each MCB of our project
  • The letter of the tripping characteristic curve (A, B, C, D, K, G)
  • Common practice is to prefix the letter of the characteristic curve before In
    eg "B10A" means MCB with In=10A and curve B (magnet current 3-5*In)
  • The rated breaking capacity (Icn) in kA
Combination 1
Combination 2
Combination 3
Combination 4
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