Siemens 3AH35-SE Series Instruction Manual page 24

24
Cleanliness check
Figure 2: Vacuum circuit breaker operator
module on page 8 is a side view of the circuit
breaker with the insulating barriers removed
(if furnished) to show the vacuum interrupter,
and the fixed-end and moving-end
connection pads.
All of these components must be clean and
free of dirt or any foreign objects. Use a dry
lint-free cloth. For stubborn dirt, use a clean
cloth dipped in isopropyl alcohol (except for
the vacuum interrupters). For stubborn dirt
on a vacuum interrupter use a cloth and
warm water and a small amount of mild
liquid-household detergent as a cleaning
agent. Dry thoroughly using a dry lint-free
cloth.
Inspection of flexible connectors
Inspect the flexible connectors that connect
the movable contacts of the vacuum
interrupters to the moving-end connection
pad for tightness and absence of mechanical
damage, burning or pitting.
Checks of the stored-energy operator
mechanism
The stored-energy operator checks are
divided into mechanical and electrical checks
for simplicity and better organization. This
first series of checks determine if the basic
mechanism is clean, lubricated and operates
smoothly without control power. The contact-
erosion check of the vacuum interrupter is
also performed during these tasks.
The use of unauthorized parts in the repair of the equipment, or tampering by unqualified personnel can
result in hazardous conditions, that can result in death, serious injury or property damage.
Follow all safety instructions contained herein.
Inspection items and tests
Primary-power path checks
Cleanliness check
Inspection of flexible connectors
Stored-energy operator mechanism checks
Maintenance and lubrication
Fastener check
Manual-spring charging check
Contact-erosion check
Electrical-control checks
Wiring and terminals checks
Automatic spring-charging check
Electrical close and trip check
Vacuum-integrity check
High-potential test
Insulation test
Contact-resistance test
Inspection and cleaning of circuit breaker insulation
Functional tests
Table 1: Maintenance tasks