9
Installation
Fig.1 Three-phase measurement with PEN
conductor. (four-wire measurement)
Fig.4 Measurement with two current trans-
formers. (four-wire measurement)
Fig.3 Measurement with three current trans-
formers and three voltage transformers. (four-
wire measurement)
Fig.2 Three-phase measurement without PEN
conductor. (four-wire measurement)
Fig.5 Medium-voltage measurement with two
current and three voltage transformers. (four-
wire measurement)
Connection options
The UMG507 can measure in systems with
N and even in systems without N through
two voltage transformers. Measurement in
systems with L1/L2/L3 and N (PEN) is called
four-wire measurement here. Measurement
in systems with L1/L2/L3 but without N is
called three-wire measurement.
The UMG507 is preset in the factory for mea-
surement in systems with N (four-wire mea-
surement).
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