Siemens Sivacon S8, Планировочная информация

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SIVACON S8 Planning Principles – Universal mounting design
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4.3.3 Withdrawable design - high feature
design (HFD)
The withdrawable units provide a mobile, wear-resistant
contact system. Disconnected, test and connected position
can be effected by moving the contacts without moving
the withdrawable unit behind the closed compartment
door (Fig. 4/10). Moving the contacts unit under load is
prevented by an maloperation protection. The degree of
protection is kept in every position. In the disconnected
position, all withdrawable unit parts such as the contacts
are located within the device contour and are protected
against damage.
Fig. 4/9: Structure of a small withdrawable unit in HFD
Test
position
Disconnected
position
Connected
position
TEST
0
Fig. 4/10: Positions in the HFD contact system
Instrument panel
Operator panel for with-
drawable unit incl.
- Rotary operating mechanism
- Position indicator
- Operating error protection
- Locking option
Basic with-
drawable unit
Contact enclosure of
control plug
Contact enclosure
input / output
Device/cable cover
(removable)
Withdrawable units are available as small withdrawable
units (size ½ and ¼, see Fig. 4/9 and Tab. 4/12) and as
normal withdrawable units (Tab. 4/12). The withdrawable
units of all sizes provide a uniform user interface.
In addition to the main switch, the individual positions can
be locked. Controls and signalling devices are installed in
an instrument panel. All withdrawable units are equipped
with up to 40 auxiliary contacts.
Tab. 4/12: Withdrawable units in HFD
Type
Withdrawable
unit
height
View
Small
withdrawable
unit
Width
¼
150 mm,
200 mm
Small
withdrawable
unit
Width
½
150 mm,
200 mm
Normal
withdrawable
unit
≥ 100 mm
(grid 50 mm)