GEAFOL- / CARECO-Cast-resin Transformer/ Operating Instructions
© 2021 Siemens Energy
Page 11
Figure 5-10: Detect the end position
of the cover by feeling of the screw
5.7
Covers on high-voltage
tappings and tubes of delta
connection
Transformers for specific applications may have covers on
the high voltage tappings and the tubes of the delta con-
nection (See Figure 5.8) These covers are essential parts of
the insulation system.
The transformer may only be operated if these covers are
correctly installed.
Damaged covers must be replaced BEFORE switching on
the transformer.
WARNING!
Switching on the transformer with missing or
damaged electrical insulation covers may destroy
the transformer.
5.8
Disassembly of delta
connections
WARNING!
Disassembly and fitting of the delta connections is the re-
sponsibility of the customer !
When installing the transformer in confined spaces, it may
be necessary to dismantle the delta connections.
If there are covers at the ends of the switch tubes, open
the cable ties with a spanner and carefully pull the cover
off the screw connection.
Mark the screws and switch tubes with the relevant instal-
lation position BEFORE dismantling the switch tubes!
WARNING!
Tightening the screws of the delta connections with too
low torque or mixing up the screws of can lead to serious
damage to the transformer!
CAUTION!
The screws for fixing the switch tubes may have different
lengths. Mixing up the screws can result in the torque be-
ing achieved without the switch tubes being pressed
against the contact surfaces.
Figure 5-9: Position of the washers at
the delta connection Anschluss
Figure 5-8: Covers on high-voltage tap-
pings and tubes of delta connection
