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Power Transformers
winding and A, B, C (and Neutral) of tertiary winding have to be connected
by a copper wire (see Figure 6-1).
Figure 6-1 Three-winding transformer with connected winding
• The neutral terminals of all Y-connected windings with outside-connected
Neutral have to be disconnected from ground (tank).
• If the transformer has a tap changer then it should be set to the neutral
position (0 or middle tap).
• Connect the CPC 100 + CP TD1 ground terminal to the transformer's
(substation) ground.
• Connect the high-voltage output of the CP TD1, e.g. to the high-voltage
winding (according to the connection instructions). Touching any parts
N (L) C (L)
A (L) B (L)
A (H) B (H) C (H) N (H)
H
L
T
B (T)
C (T)
A (T)
ABC
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