Medium Voltage/Low Voltage Measurement - Siemens SICAM A8000 Series Manual

Standard I/O Modules
2.8.6.4

Medium Voltage/Low Voltage Measurement

The voltages in the medium-voltage network are determined by measuring the voltages from
the low-voltage network (secondary side of the transformer).
The voltage inputs U1, U2, U3 are directly connected with 240 V in the low-voltage network.
The current inputs I1, I2/IN, I3 are connected through the adaptor module CM-8820 with the
corresponding measuring sensors in the medium-voltage network.
In this configuration, the module determines the direction of phase fault and ground fault.
These connection diagrams are used for solidly grounded networks.
Note
The module supports Dy-11 transformer type only. For this type, the secondary side of the transformer
lags the primary side by a phase angle of 330°.
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Unrestricted SICAM A8000 Series, SICAM I/O Modules
DC8-012-2.06, Edition 09.2019