Mounting; Attachment In The Switching Cubicle - Siemens 3AH3 Operating Instructions Manual

Mounting

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Mounting position
Siemens Parts
9229 9860 176 0E
2013-08-22
DANGER
High-voltage – danger to life
Touching live parts causes an electric shock.
• Do not touch live parts!
• When performing work on the switchgear, de-energise it and earth it.
• The work described in the following sections must only be performed when
the switchgear has been de-energised:
- Take safety measures to prevent reclosing.
- Observe industrial safety regulations.
- Ensure that the vacuum circuit-breaker is installed and commissioned only
by qualified personnel who are familiar with the operating instructions and
observe the warning notices.
WARNING
Risk of injury due to wrong transport means!
Using wrong transport means may cause the vacuum circuit-breaker to fall and
injure persons.
• Observe weight.
• Use means of transport suited to the requirements and load-carrying capac-
ity.
• The vacuum circuit-breaker must not fall over.
• Sharp edges may cause injury.
Note
For preliminary work, the vacuum circuit-breaker must be
• secured against falling over,
• placed onto a suitable support or
• suspended from a crane to prepare for installation.

Attachment in the switching cubicle

The vacuum circuit-breaker is delivered in the OPEN switching position. Before
installing the vacuum circuit-breaker, remove the transport aids (see "Unpacking (I)"
on page 6 and "Unpacking (III)" on page 12).
Before installing the vacuum circuit-breaker in a switching cubicle, check the details
on the rating plate (see "Rating plate" on page 35) in order to avoid confusion.
The 3AH3 vacuum circuit-breaker can only be installed vertically (to the vacuum
interrupter), as an indoor withdrawable section and as an indoor fixed installation.
Fig. 58 Mounting position
Mounting
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