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= Peak value
= Minimum value
= Supply
Attention!
Current transformer clamps, which are not earthed can be dangerous to touch.
m
Attention!
Voltages, which exceed the allowed voltage range, can damage the device.
m
Check phase assignment
The assignment of the outer conductors to the current transformer is correct, if a current transformer is short
circuited on the secondary, and the indicated current in the corresponding phase decreases to 0A at the UMG96.
Check current flow
Short circuit two current transformers on the secondary. The real power in the connected phase must be:
Positive (+) for consumption of real power and
negative (-) for supply of real power (power station service).
If no real power is indicated, the assignment of voltages and currents can be wrong.
Diagr: Connection example, four wire measurement with three
current transformers
UMG 96
Messung
Measurement
1 2 3 4 5 6 7 8 9 10 11 12 13 14
L1 L2 L3 N 1k 1l 2k 2l 3k 3l
2 ..10A
+ -
max. 30V DC
L1
../5(1)A
Verbraucher
Consumer
10210050ot
K1 K2
0,01 .. 5A
Hilfsaus-
gang
Auxiliary
Output
L3
PEN
L2
../5(1)A
../5(1)A
k l
k l
k l
=
See type
plate
