g.
In contrast copper, aluminium
exhibits certain characteristics that
must taken into account when using
this material conductor in
electrical engineering.4
SAK 105 4.0
Stranded conductors
W-Series
WFF 105 3.
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.5 1.
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 2.8
SAK 0.4
SAK 2.
A thin, non-conductive layer oxide
forms immediately the unprotected
surface the aluminium soon it
is exposed the air. After removing the layer oxide,
coat the end the conductor
immediately with neutral grease,
e.6
SAK 2.5
WDU 3.0-30.
Caution: not use brushes, files
or emery paper because particles
of aluminium can deposited on
other conductors.Installation instructions
The use aluminium conductors
Weidmüller terminal blocks are suitable
for the direct connection single
strand round and sector-shaped
aluminium wires.0-6.0-2.
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.2-1. with a
knife, remove the layer oxide.0-6.0-12.5 0.0
WDU 240 240 415 25.0
WFF 300 300 409 30.8
WDU 1.0
WFF 185 185 300 15.5 0.5 2.0
WDU 120 150 290 15. Scrape the stripped end the
conductor carefully, eg.
1.0-60.0-2.4
WDU 0. 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.
This layer increases the contact
resistance between the aluminium
conductor and the current bar of
the modular terminal.0
Al cable lug
Cu side
4
5
W
Technicalappendix
W.0-20. And that, in
unfavourable conditions, can lead
to poor contact.6-1.5 2.5-0.5-31.
3.0
WFF 120 120 230 10. acid- and alkalifree Vaseline,
and connect the terminal
immediately.0
WDU 4.5 2. Repeat the above procedure any
time the conductor disconnected
and reconnected.0
SAK-Series
SAK 2. 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.0
WFF 163 6.5 2.
This the only way guaranteeing a
reliable transition between the copper
and the aluminium. The above installation instructions
are valid for solid round sector
aluminium conductors only.2
WDU 3.251282250000 2012/2013
.
2.
4.0
SAK 3.5 0
