Siemens UL 508A 참조 매뉴얼 - 페이지 19

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4.2 SB4.3 – Adaptation of the available short-circuit current rating based on the peak let-through currents when

using current-limiting devices in the feeder circuit

Short-circuit current rating (SCCR) of industrial control panels

Reference Manual, 06/2013, A5E31896849002A/RS-AA/001

Basic steps for calculating the SCCR of a control panel

The selected circuit breaker lets 22 kA

through at a short-circuit of 100 kA.

⇒ In other words, all components in the

branch circuit must be designed for at

least 22 kA. The control panel is suitable

for a maximum let-through value of

100 kA.