Maintenance
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2013-08-28
Maintenance
Maintenance and servicing
To maintain reliability during the entire operating time and to ensure the operating
cycle numbers, depending on
•
the type of vacuum circuit-breaker (see “Technical data” on page 33)
•
the operating conditions see “Ambient conditions” on page 34),
•
the number of mechanical and electrical operating cycles,
•
and the operating time,
regular maintenance work must be performed according to the following mainte-
nance plan.
DANGER
High voltage – danger to life
Touching live parts is fatal or causes serious physical injury.
Before beginning maintenance work, note the five safety rules for high-voltage
equipment specified in EN 50110-1, namely:
•
Isolate from the power supply*)
•
Secure against reclosing
•
Verify safe isolation from the power supply
•
Earth and short-circuit
•
Cover or cordon off neighbouring live parts
*
)
On the vacuum circuit-breaker, actuate the OPEN, CLOSE and OPEN pushbut-
tons manually one after the other. This ensures that the vacuum circuit-breaker is
open and the closing spring is discharged.
Note
The vacuum circuit-breaker should be taken out of the switch cabinet or switch-
gear for servicing.
Summary of Contents for 3AH4
Page 4: ...4 9229 9862 176 0D 2013 08 28 Blank page ...
Page 14: ...Transport storage and packing 14 9229 9862 176 0D 2013 08 28 Blank page ...
Page 42: ...Description 42 9229 9862 176 0D 2013 08 28 Blank page ...
Page 52: ...Operation 52 9229 9862 176 0D 2013 08 28 Blank page ...
Page 60: ...Maintenance 60 9229 9862 176 0D 2013 08 28 Blank page ...
Page 62: ...Index of keywords 62 9229 9862 176 0D 2013 08 28 Blank page ...