![]()
ALPHA FIX Terminal Blocks
Screw Terminals
General data on 8WA
11/5
Siemens ET A1 · 10/2008
11
Connection of aluminum conductors
Siemens screw terminals are suitable for connecting aluminum
conductors when the normal processing guidelines are com-
plied with prior to connection, e.g. the brushing and greasing of
conductors.
After a few days, the connection should be tightened again for
safety reasons.
8WA1 through-type terminals with screw terminals at both ends, sectional
view
PE and PEN terminals
In switchgear and controlgear systems the support rails for the
terminal blocks are frequently used as protective ground bus-
bars. The PE (protective ground) terminals provide the connec-
tion to the mounting rail.
The fact that there is no separate PE busbar means the PE ter-
minals, the insulated main conductor terminals and neutral iso-
lating terminals can be arranged according to user require-
ments. This makes the individual circuits clearly manageable.
The bare 8WA1 010-1PH01 PE terminals are primarily for con-
necting the shields of screened cables. They are normally
mounted on a standard mounting rail, which is installed by
means of an 8WA1 857 insulation carrier.
Accessories
Parallel link rails
The link rails are screwed into the terminals from above and al-
low parallel connection of up to 10 terminals up to terminal size
35 mm². The 10-pole link rails can be shortened as required. On
70 mm² terminals the link rails are two-pole. On the 50 mm² to
240 mm² terminals they are inserted in the clamping points. Link
rails for flat-type and bolt-type screw terminals are not included
in delivery.
Barriers
Barriers are yellow in color and project beyond the contours of
the terminals. They serve the visual separation of groups of ter-
minals, the electrical isolation of adjacent link rails and to im-
prove the insulation rating for soldered and plug-type connec-
tions.
Insulation plates
8WA1 825 and 8WA1 022-7TK00 insulation plates can be used
with different terminals for providing electrical insulation be-
tween link rails.
Test sockets and plugs
The 8WA1 854 test sockets for 2.3 test plugs and reduction
plugs with a Ø 4 mm borehole can be screwed into some termi-
nals in place of the link rails.
Jumpers
The 8WA1 865 jumpers provide a detachable connection be-
tween two adjacent terminals sizes 2.5 to 6 mm².
Covers with lightning symbol
The purpose of these covers is to identify the power input termi-
nals. At the same time, they provide additional touch protection.
End retainers and labeling plates
End retainers are available in thermoplastic or galvanized and
chromated steel. The end labeling plate can be fitted in an
8WA1 808 end retainer or, in any of three positions, in an
8WA1 805 end retainer.
I2_14019
5 1
2
3
4
6
1
2
3
4
5
6
Screwdriver guide
Cut-out for labeling
plate
Cable entry
Terminal body
Thread for parallel
link rail
Elastic retaining feet
© Siemens AG 2008
