Example Of Branch Circuit With Fuse - Siemens SENTRON 3WA1 Manual

8WH1 and 8WH2 diode terminals:
8WH1
Diode terminal
Flow direction designation
From left to right
Right to left
2.10.6.3

Example of branch circuit with fuse

When fuses and circuit breakers are used simultaneously, the fuse characteristic
determines the required delay of the circuit breaker for current or time grading.
To be able to ensure selectivity, in this example the grading times t
delayed short-circuit protection ST are 0.3 s for the -Q3 circuit breaker and 0.4 s for the
-Q1 circuit breaker.
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
8WH2
8WH1
screw terminal
8WH1000-6LG00
8WH1000-6KG00
2.10 Zone-selective interlocking ZSI
8WH2
spring-loaded terminal
8WH2003-5DF00
8WH2003-5CF00
of the short-time-
sd
Description
195