Siemens SENTRON 3WA1 - Page 535

Integration in power distribution equipment
7.4 Requirement according to IEC 61439
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
533
Changing the rated-current coding
Note
The information in this section applies exclusively to the following cases:
•
Retrofit of a 3WL1 circuit breaker in size 1 with breaking capacity S
– Article number 3WL11..-3..3.-.... (3-pole)
– Article number 3WL11..-3..4.-.... (4-pole)
or
•
Use in a 3WL1 guide frame
– Article number 3WL9211-1B...-....
– Article number 3WL9211-2B...-....
Changing the rated
-current coding is only permitted in these special retrofit cases. In all
other cases, the coding must not be changed.
In the event of the retrofit of a 3WL1 circuit breaker in size 1 with breaking capacity S or
use in a 3WL1 guide frame, which is either installed in the control panel as an expansion
reserve or still in storage, the rated-current coding must be adapted in addition to
adapting the secondary disconnect terminal wiring.
If an upgraded 3WL1 upgrade circuit breaker / non-automatic circuit breaker or guide
frame is already in use, this modification is not necessary:
• Article numbers of 3WL1 circuit breaker upgrade
– 3WL11..-3..6.-.... (3-pole)
– 3WL11..-3..7.-.... (4-pole)
• Article numbers of 3WL1 guide frame upgrade
– 3WL9211-1G...-.... (≲ 1000 A)
– 3WL9211-2G...-.... (1250 A to 1600 A)