10
Voltage measurement
The UMG507 is suitable for measuring alter-
nating voltages of up to 500VAC to earth and
870VAC phase-to-phase. The wiring cables
for the measured voltages must be suitabel for
voltages up to 500VAC to earth and 870VAC
phase-to-phase.
Attention!
The UMG507 is not suitable for mea-
surement of direct voltages.
Voltages over 500VAC to earth must
be connected through a voltage trans-
former .
The supply conductors for voltage
measurement in UMG507 must be
protected by an overcurrent protective
device.
Installation
Fig.6 Three-phase measurement without PEN
conductor with three current transformers.
(three-wire measurement)
Fig.7 Three-phase measurement without PEN
conductor with two voltage transformers and
three current transformers. (three-wire mea-
surement)
Fig.8 Three-phase measurement without PEN
conductor with two voltage transformers and
two current transformers. (three-wire mea-
surement)
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