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Check measurement
Provided that all voltage and current inputs are
connected correctly, the phase and sum power
is calculated and displayed correctly.
Check phase power
In case that a current transformer is assigned
to the wrong outer conductor, the correspond-
ing power is measured and indicated incor-
rectly.
The assignment of the outer conductor and cur-
rent transformer is correct, if no voltage is
measured between the outer conductor and the
primary of the corresponding current trans-
former.
To ensure that the outer conductor at the volta-
ge input is assigned to the right current trans-
former, please short circuit the secondary of the
corresponding current transformer. The appar-
ent power of this phase at UMG 96L must be
indicated by zero.
If the apparent power is indicated correctly, but
the real power has a „-“ sign, the current trans-
former clamps are interchanged, or power is
supplied to the energy supplier.
Check sum power
Provided that all voltage, current and power in
the corresponding phase is indicated correctly,
the sum power must be displayed correctly by
UMG 96L either.
For verification, the sum power measured by
UMG96L should be compared to the energy
stated by the real and reactive energy counters
of the supplier.
Connect measuring current
The UMG96L is designed for the connection of
../1A and ../5A current transformers. With the
current inputs, only alternating current but no
direct current can be measured.
Check current direction
Short circuit two current transformers on the
secondary. The real power in the connected
phase has to be:
Positive (+) for consumption of real power and
negative (-) for supply of real power (power sta-
tion service).
In case that no real power is indicated, the as-
signment of voltages and currents may be
wrong.
Check phase assignment
The assignment of the outer conductors to the
current transformer is correct, if a current trans-
former is short circuited on the secondary, and
the indicated current in the corresponding
phase decreases to a value at the UMG96L,
which corresponds to the secondary current
plus tolerance.
Attention!
Current transformers may not be han-
dled in open condition, as there might be
live voltage at the secondaries.
Please connect the current inputs one after the
other, and compare the indicated current of the
display with the actual current. Please note,
that the current transformer ratio is set to 5/5A
and has to be adapted to the existing current
transformers.
In case that the current transformer is short
circuited on the secondary, the indicated cur-
rent at the corresponding conductor at UMG
96L has to decrease to a value, that corre-
sponds to the secondary current plus tolerance.
The current indicated by UMG 96L, has to con-
form to the input current, under consideration
of the current transformer and tolerance.
Ꮨ
Strommessung/Current Measurement
k l
L2
L3
L1
k l
k l
5
7
10
8
9
6
Spannungsmessung
Voltage Measurement
2
1
L1
4
N
3
L3
L2
UMG96L
45-65Hz IP20
2,5V
A
Made in Germany
S V J M
A
D E
P
2-
10A
