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Check measurement
If all voltage and current inputs are connected
correctly, the single phase and sum power must
be calculated and indicated correctly.
Check single phase power
If a current transformer is assigned to the wrong
outer conductor, the corresponding power is
measured incorrectly.
The assignment of the outer conductor and ct at
UMG96S is correct, when there is no voltage
between outer conductor and the corresponding
ct (primary).
To ensure the outer conductor is assigned to the
right ct, the ct can be short-circuited at the
secondary. The UMG96S must indicate the cor-
responding apparent power in this phase with
zero.
If the apparent power is indicated correctly, but
the real power is indicated negatively, the ct ter-
minal has been exchanged or power is supplied
to the energy supplier (generator).
Check sum power
If all voltage, current and power are indicated
correctly, the sum power must be indicated cor-
rectly as well. As confirmation, please compare
the indicated sum power of UMG96S with other
meters, that might be available.
Connect measurement current
The UMG96S is designed for the connection of
../1A and ../5A current transformers.
Only alternating currents can be measured, no
direct currents
.
Current transformer terminals must be
earthed on the secondary.
Current transformers, which do not carry
load on the secondary, can lead live
voltage and must be short-circuited.
Please connect the current inputs one after the
other and compare the indicated current with
the real current. Please remember, that the ct
ratio is set to 5/5A and must be adapted to the
used cts.
If the current transformer is short-circuited on
the secondary, the UMG96S must indicate zero
A in the corresponding outer conductor.
The current, indicated by UMG96S must corre-
spond to the input current with respect to the
current transformer.
Check current direction
Short-circuit two current transformers. The re-
maining phase must display real power as:
(+) for consumption of real power or
(-) for supply of real power (generator).
If no real power is indicated, the assignment of
voltage to current may be false.
Check phase assignment
The assignment outer conductor to current
transformer is correct, when the indicated cur-
rent in UMG96S gets 0A while short-circuiting
the secondary of the current transformer.
c
RS 232
RS 485 I / O
UMG96 S
45-65Hz 3VA
Made in Germany
S V J M A D E P
Strommessung/Current Measurement
k
l
L2
L3
L1
k
l
k
l
5
7
10
8
9
N L3 L2 L1
6
Spannungsmessung
Voltage Measurement
15 14 13 12 11 4 3 2 1
Profibus
Содержание UMG 96S
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