The shunt capacitors are usually connected directly to the grid voltage but in some cases may be connected to a lower voltage via a tertiary winding on the converter transformer.
2.
The transformers, which are connected to 138 kV on the Alberta side and 230 kV on the Saskatchewan side, are each equipped with a 25 kV tertiary winding ( to which the harmonic filters are connected ) in addition to the two valve windings.
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