No.
Test
Test description
7
Tan(δ)
measures
The test is performed using the TD 5000 optional module, and then connecting the high AC
voltage source to test target.
Displayed parameters are the following:
•
Test type (1)
: Where the HV output is applied: in case of a specific device under
test (CT, VT, PT or bushing), the options are displayed
•
Capacitance (2)
: In case of a specific device under test (CT, VT, PT or bushing), the
options are displayed
•
Generation mode
: to execute a single shot, a voltage or a frequency gradient
•
Test mode
: It is selected in reference to the TD 5000 and the device under test
connection. In case of a specific device under test (VT, in this case), the more
correct test mode is automatically selected, considering also the selections (1) and
(2)
•
Voltage/Frequency test table
: It allows to input the test voltage and frequency
•
Nominal Values
: Capacitance and TD reference values. In case of a specific device
under test (CT, VT, PT or bushing), these values are kept from the related headers
•
Temperature compensation: The Capacitance and TD values vary with the
temperature: optionally, the “k” factor is used to compensate the measures
•
Test table
•
Results table
•
Test voltage, current and frequency
•
Capacitance, Tan(δ), power factor (PF)
•
Power: active, reactive, apparent
•
Impedance: module, argument, components
8
Demagnetizer
Purpose of this test is to apply a DC current with alternate polarity to the winding, in order
to remove from the core the residual magnetism due to a previous winding resistance
measurement.
Input parameters are the following:
•
Nominal current (primary and secondary)
•
Connections A, B, C according to the vector group
•
Transformer side selection
•
Output Range
•
Test current
The display shows the following:
•
DC current and voltage
•
Current behavior during the demagnetization procedure
Table 49 – Power Transformers tests (3/3)
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