3KC3 and 3KC6 transfer switching equipment3KC3 and 3KC6 transfer switching equipment
Mounting and connecting auxiliary switches
An auxiliary switch to indicate switch position (3KC9603-1) comes already installed in the 3KC3 transfer switching equipment. A maximum of one additional auxiliary switch may be mounted.
With the 3KC6 transfer switching equipment, it is possible to mount a maximum of two auxiliary switches.
Auxiliary switches with separate contacts (3KC9603-1) and auxiliary switches with linked common contacts (3KC9603-2) can be selected depending on requirements.
Mounting auxiliary switches
Procedure
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Check that the transfer switching equipment is in the 0 position.
Check that the auxiliary switch that you want to use is also in the 0 position.Check switch position 0 -
With the 3KC3 transfer switching equipment only or if an auxiliary switch has already been mounted: Remove the fixing screws of the auxiliary switch which has already been mounted.
3KC3: Remove the fixing screws of the auxiliary switch -
If you are only mounting one auxiliary switch (3KC6), fix the auxiliary switch with the 20 mm long screws.
Mount one auxiliary switch (3KC6)If you are mounting two auxiliary switches, fix these using the 35 mm long screws.
Mount two auxiliary switches
Connecting auxiliary switches
See the table and figures below for the requirements of the supply lines needed for the connection:
Cu |
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0.5 ... 2.5 mm2 |
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0.5 ... 1.5 mm2 |

Procedure
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Strip the cable insulation as shown in the figure below.
Connect the supply lines with the auxiliary conductor in accordance with the figure.Connect auxiliary switches -
Tighten the contacts with a screwdriver.