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Siemens UL 489 - Coding between Circuit Breaker and Cradle

Siemens UL 489
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17 – 12
Function check
- Insert the circuit breaker into the cradle and push it into the disconnected position (page 6-1)
- It must not be possible to draw out the racking handle
17.4 Coding between circuit breaker and cradle
Draw-out circuit breakers and cradles are equiped with a factory coding.
This coding ensures that only circuit breakers can be inserted whose blade contacts match the contacts of the cradle and whose instanta-
neous interrupting capacity and rated current correspond to those of the cradle.
Mechanical interlock Order No.
Locking device against moving the circuit breaker if
the cubicle door is open
WLDRLC5UL

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