ABB REL 551 2.3 Series Installation And Comissioning Manual page 29

Mounting the terminal
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The strip is delivered with the mounting kit. In the semi-flush
mounting kit two strips are delivered, one for the terminal and one
self-adhering for the distance frame. The length of the strip is
enough for the largest available terminal.
Cut the strip into four, one part for each side of the terminal. When
cutting, make sure no gaps will be present between each part. Pref-
erably, seal the joints at the corners (posNo 1).
Repeat the procedure for the self-adhering strip which are to be ad-
hered to the distance frame.
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The remains should be source separated as soft plastic.
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semi-flush mounting only.
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See the Technical reference manual for cut-out dimensions.
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Thread a side holder into the groove (posNo 5) at the back end of
the terminal. Insert and lightly fasten the locking screw (posNo 6).
Next, thread a side holder on the other side of the terminal, and
lightly fasten its locking screw.
Repeat this with the remaining two side holders.
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