Siemens SIRIUS 3RT - Replacing the Vacuum Interrupters (Sizes S10 and S12)

Mounting
7.5 Replacing the vacuum interrupters (sizes S10 and S12)
SIRIUS - SIRIUS 3RT Contactors/Contactor assemblies
222 Manual, 09/2017, A5E03656507120A/RS-AE/006
7.5
Replacing the vacuum interrupters (sizes S10 and S12)
The vacuum interrupters can be replaced on the 3RT12 vacuum contactors.
The three switch position indicators on the front side of the contactors serve at the same
time to indicate contact erosion / wear for each of the three vacuum interrupters. When the
limit mark of an interrupter is undershot (indicator line is at the level of the tool symbol), all
three vacuum interrupters must be replaced.
Figure 7-4 Contact erosion indicator and switch position indicator