janitza UMG 96 RM, Инструкция по эксплуатации и технические данные

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UMG 96RM
Rotation field direction
Check the direction of the voltage rotation field on the
measured value display of the UMG 96RM.
Usually there is a "clockwise" spinning rotation field.
Checking the phase assignment
The assignment of the phase conductor to the current
transformer is correct if a current transformer is short
circuited at the secondary terminals and the current
shown by the UMG 96RM in the corresponding phase
sinks to 0A.
Checking the power measurement
Short circuit all current transformer outputs except for
one and check the displayed power.
The UMG 96RM must only show one rating in the phase
with the non-short-circuited current transformer input.
If this does not apply, check the measured voltage
connection and the measured current connection.
If the magnitude of the real power is correct but the sign
of the real power is negative, this can be due to two
causes:
• The connections S1 (k) and S2 (I) on the current
transformer are inverted.
• Active energy is being returned to the network.
Checking the measurement
If all voltage and current measurement inputs are
correctly connected, the individual and sum power
ratings are accurately calculated and displayed.
Checking the individual power ratings
If the current transformer is assigned to the wrong
phase conductor, the associated power rating will be
incorrectly measured and displayed.
The assignment of the phase conductor to the current
transformer on the UMG 96RM is correct if there is
no voltage between the phase conductor and the
associated current transformer (primary).
In order to ensure that a phase conductor on the voltage
measurement input is assigned to the correct current
transformer, the respective current transformer can be
short-circuited at the secondary terminals. The appar-
ent power shown by the UMG 96RM must then be zero
in this phase.
If the apparent power is correctly displayed but the real
power is shown with a "-" sign, the current transformer
terminals are inverted or power is being fed to the power
company.