25
Current transformer
Current transformers with either a secondary
current of 1A or 5A can be connected to the
UMG507.
Example: summation current transformer
Current measurement takes place through
one current transformer with a conversion
ratio of 1000/5A and a current transformer
with a conversion ratio of 200/5A. The total
measurement is carried out by a summation
transformer 5+5/5A.
The UMG507 must then be programmed with
the following values:
Primary current: 1000A + 200A =
1200A
Secondary current:
5A
Program current transformer
Current
transformer Adjustment range Preset
Primary 1A .. 999.9MA
5A
Secondary 1A .. 5A
5A
2
1
Press 2 times.
Confirm selection.
Press once.
SELECT
CT
CONF
A
A
The
Select text
flashes.
CT
CONF
A
A
The
Select text
disappears.
2
1
3
Press once.
The first digit of
the primary cur-
rent flashes.
Change digit.
Change current transformer setting.
1
Select next digit.
Press once.
The second dig-
it of the primary
current flashes.
2
Change digit.
EDIT
CT
CONF
A
A
EDIT
CT
CONF
A
A
3
Move decimal
point.
Move decimal
point.
If none of the digits are flashing any more,
you can use Key 3 to switch to the voltage
transformer displays.
3
Configuration
