REG 316*4 1MRB520049-Uen / Rev. C ABB Switzerland Ltd
2-15
The connections to the primary system are made via the two
UHV heavy-duty terminals 10 and 15 which are designed for
spade terminals. There are four universal terminals 11 to 14
Type UK35 between the two heavy-duty terminals that are used
for the internal wiring.
Depending on the version, the four windings must be connected
to the corresponding universal or heavy current terminals.
Should the version as supplied be unsuitable for the application,
the connections of the windings can be modified as required
according to the following diagrams.
In the case of versions M12, M22, M13 and M23, shorting links
KB-15 must be placed on the universal terminals. How this is
done can be seen from the diagram “Shorting links” at the end of
this section.
Shorting links and 3 rating plates are supplied with every
transformers. The corresponding rating plate must be affixed
over the old one following conversion.
Versions M11 and M21
universal terminals (UK)
10
11 12
13
14
15
16
17
S3
S4 S5 S6
10
11 1312 14
15
heavy-duty terminals (UHV)
In the case of versions M11 (REX 011-1) and M21 (REX 011-2),
the two windings S3 and S4 are connected in parallel across the
heavy-duty terminals (10, 15). The other two windings are not
used and are wired to the universal terminals. The shorting links
KB-15 are not needed and must be removed.
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