janitza UMG 96S 24V, Руководство по эксплуатации, Страница: 38 / 96

Page 38
Current transformer (Add 600)
Current transformers with a secondary current
of either 1A or 5A can be optionally connected
to the UMG96S.
A current transformer of 5A/5A is programmed
in the factory. In programming mode, the
current transformer setting is denoted by the
symbol “
CT ”.
Primary
current in kA
Current
transformer,
secondary (601)
Symbol for the
current
transformer ratio
PRG
k A
L1
L2
L3
CT
Example: Summation current transformer
Each current measurement is taken via a cur-
rent transformer with a transformation ratio of
1000/5A and a current transformer with a trans-
formation ratio of 200/5A. The summation
measurement is performed with a 5+5/5A sum-
mation transformer.
The UMG96S must then be programmed with
the following values:
Primary current: 1000A + 200A = 1200A
Secondary current: 5A
Current transformer,
primary (600)
Programming
In programming mode, use Key 2 to page to the
current transformer setting. Use Key 1 to con-
firm the selection.
The first digit of the primary current flashes and
can be changed using Key 2. If you press Key
1, the next digit is selected and flashes.
If the whole number flashes, the decimal point
can be shifted.
Briefly press Key 2 - The decimal point is
shifted to the right.
Press Key 2 for an extended time - The deci-
mal point is shifted to the left.
If none of the digits are flashing any more, use
Key 2 to switch to the display of the voltage
transformer.