ABB TJC 5_1VLC000532 Indoor voltage transformers,
The TJC 5 single-pole insulated voltage transformers cast in epoxy resin,
and designe mostly for insulation voltages of 12 kV to 17.5 kV.
If no other value is require the transformers are manufacture,
with a overvoltage factor of 1.9 x Un/8 hrs.
One outlet of the primary winding, including the respective terminal is insulate from the earth to a level,
which corresponds to the rated insulation value.
The transformer is mostly equippe with two secondary windings,
the first one for either measuring or protection purposes,
the other for being connecte into an open-delta connection in a threephase system.
One terminal of each secondary winding and one of the open-delta connecte terminals have to be earthe during the transformer operation.
When not require otherwise,
the secondary windings are lead out into a casttype secondary terminal board.
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