Siemens UL 489 Operating Instructions Manual page 158

Installing the BSS module
Hazardous voltage.
Will cause death, serious personal injury, or equipment damage.
Turn off and lock out all power supplying this equipment before working on this device.
High speed moving parts.
Can cause serious personal injury.
Discharge the closing spring before inspection and before carrying out any work on the circuit breaker.
Always discharge the closing spring before removing any covers or the front panel of the circuit breaker
Move the circuit breaker into the withdrawn position in the cradle

Replace the trip unit (page 9-49).
2
(1) BSS
(2) Actuating shaft
(3) BSS
(4) "Ready-to-close" indicator
(5) Drive shaft
(6) Carrier
9 – 56
DANGER
WARNING
(page 24-3)
1
(page
and Removing front panel (page
24-2).
24-4).
3
4