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Manual 37139C UMT 1 - Measuring Transducer
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Measurement
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WARNING
The following values must be entered correctly for the generator to be monitored. Failure to do so may
lead to incorrect measuring of parameters resulting in damage to or destruction of the generator
and/or personal injury or death.
Potential Transformer Configuration
NOTE
The screens described below are not available in the 690 V-version.
Volt.transformer
secondary 000V
Voltage transformer secondary [1] 50 to 125 V; [4] 50 to 480 V
The secondary voltage is set here in V. This parameter displays the primary voltage
on the control unit LC display. For measuring voltages of 400 V without the use of
a measurement transformer, the voltage must be set to "
400V
".
Volt.transformer
primary 00.000kV
Voltage transformer primary 00.100 to 65.000 kV
The primary voltage is set here in kV. This parameter displays the primary voltage
on the control unit LC display. For measuring voltages of 400 V without the use of
a measurement transformer the voltage must be set "
00.400kV
".
Current Transformer Configuration
Current transf.
0000/0
Current transformer ratio 1 to 9999/x A
The input of the current transformer ratio is necessary for the indication and control
of the actual value. The ratio should be selected so that at maximum performance, a
minimum of 60 % of the transformer rated current will flow. A smaller percentage
may affect the function. Moreover, this may lead to additional inaccuracies of the
control and monitoring functions.
The control can be optionally equipped with ../1 A or with ../5 A current transfor-
mer inputs. Depending on the version there are two different specifications of the
parameter, which control the same memory location. You can find this value at the
unit on the data plate.
{x} = 1 UMT1x 1 B/xxx = Current transformer with ../1 A rated current
{x} = 5 UMT1x 5 B/xxx = Current transformer with ../5 A rated current
Example
Current in the primary winding = 300 A -> current in the secondary winding = 1 A
for current transformer ratio 300/1:
Current in the primary winding = 150 A -> current in the second. winding = 0,5 A