The parameter settings of a transformer tester must strictly match the test type and the specifications of the equipment under test. The core is to accurately input rated values, connection methods, and environmental parameters to ensure the accuracy and comparability of the measurement results.
General Parameter Setting Principles (Applicable to all types of testers)
Basic Information Input
Rated High/Low Voltage Values: Set according to the transformer nameplate, in kV. For example: 10/0.4kV.
Connection Group: Such as Yyn0, Dyn11, Yzn11, etc., directly affecting the turns ratio and impedance calculation logic.
Tap Switch Parameters:
Total number of taps
Rated tap position (usually the middle position)
Equal tap levels (voltage adjustment step, such as ±2.5%)
Test Mode Selection
Select the corresponding functional module according to the test item: DC resistance, turns ratio, capacity, no-load/load loss, etc.
Select Power Supply Type: Built-in Power Supply (portable for field use) or External Voltage Regulator (for large-capacity transformer testing).
Environment and Calibration Parameters
Test Oil Temperature: Measured current temperature of the transformer windings, used for loss data conversion.
Converted Temperature: Oil-immersed transformer: 75℃ Dry-type transformer: 100℃, 120℃, or 145℃ (depending on the standard) Temperature calibration ensures data comparability under different operating conditions.
Data Management Settings
Test Number: Facilitates archiving and traceability.
Time/Date: Automatically records the test time, supporting historical data comparison.
