MiCOM P632
Conditioning of the Measured Values
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The secondary phase currents of the system transformers are fed to the P632. Furthermore, there is the option of connecting a measuring voltage. The measured values are – electrically isolated – converted to normalized electronics levels. The analog quantities are digitized and are thus available for further processing.

The P632 has the following measuring inputs:

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Current inputs (three phases) for the processing of measured values for 2 winding ends of the transformer.

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Two current inputs for the measurement of the residual currents (see Fig. 3-44, Fig. 3-45) or, alternatively, for looping into ground connections of the phase current transformers or for connection to a Holmgreen group.

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One voltage input.

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Fig. 3-43: Connection of the measured values to the P632, connection of the fourth current transformer set to the transformers of the neutral-point-to-ground connections

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Fig. 3-44: Connection of the measured values to the P632, looping of the fourth current transformer set into the ground connections of the phase current transformers, Part 1 of 2

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Fig. 3-45: Connection of the measured values to the P632, looping of the fourth current transformer set into the ground connections of the phase current transformers, Part 2 of 2