Siemens UL 1066 Operating Instructions Manual page 233

Knocking out the field on the front panel
1 Knock out the fields on the front panel using a suitable base
2 Deburr the edges
Then:
 (page 23-4)
- Install front panel
Key lock
Circuit-breaker racking handle key lock
1
Manufacturer Catalog No.
KIRK WLLKCLKRK
SUPERIOR WLLKCLSUP
2
15 – 14