Fit the washer in
such way that the copper side in
contact with the current bar, and the
aluminium side contact with the
cable lug.4
WDU 0.5 0.0-2.5 0. acid- and alkalifree Vaseline,
and connect the terminal
immediately.0-6.Installation instructions
The use aluminium conductors
Weidmüller terminal blocks are suitable
for the direct connection single
strand round and sector-shaped
aluminium wires.0-60.5
WDU 3.
This the only way guaranteeing a
reliable transition between the copper
and the aluminium.
2.0-30.
A thin, non-conductive layer oxide
forms immediately the unprotected
surface the aluminium soon it
is exposed the air.5-0.
1. The above installation instructions
are valid for solid round sector
aluminium conductors only.8
SAK 0.5-31.
3.0
WDU 4. with a
knife, remove the layer oxide.5 2. Repeat the above procedure any
time the conductor disconnected
and reconnected.0
WDU 240 240 415 25. And that, in
unfavourable conditions, can lead
to poor contact.0
WFF 120 120 230 10.5 2.0-20.
4.
Installation advice
when using flat cable lugs
When tightening the terminal is
advisable hold the conductor to
prevent deformation the terminal rail
and avoid twisting the foot the
terminal.0
WFF 300 300 409 30.
This layer increases the contact
resistance between the aluminium
conductor and the current bar of
the modular terminal.4
SAK 2.5 1.0
SAK-Series
SAK 2.0
WDU 120 150 290 15. Scrape the stripped end the
conductor carefully, eg. After removing the layer oxide,
coat the end the conductor
immediately with neutral grease,
e.
Caution: not use brushes, files
or emery paper because particles
of aluminium can deposited on
other conductors.2
WDU 3.8
WDU 1.0
WFF 185 185 300 15.0-12.0
Al cable lug
Cu side
4
5
W
Technicalappendix
W.251282250000 2012/2013
.5 2. When connecting stranded
aluminium conductors modular
terminals, advisable use an
aluminium cable lug chosen match
the type conductor and connected
according the instructions the
cable lug manufacturer.5 0.
Fixing screw
Current bar
1 3
2
4
5Al side
Al conductor
Cu-plated washer
1
2
3
It necessary fit copper-plated
aluminium washer between the
aluminium cable lug and the copper
current bar the modular terminal.0-6.0-2.0
Stranded conductors
W-Series
WFF 105 3.0
SAK 3.4
SAK 105 4.6
SAK 2.6-1.0
WFF 163 6.5 2.g.
In contrast copper, aluminium
exhibits certain characteristics that
must taken into account when using
this material conductor in
electrical engineering.
Solid round and sector conductors
Terminal type Rated cross-section Reduced rated
current when
connecting an
aluminium conductor
Clamping screw
thread size
Tightening torque
W-Series mm2
„A“ Nm
WDU 2.2-1
