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Technical Document Reader
Document
098-024
Name

AT3600 User Manual

Description
The full user manual for the AT3600 transformer tester.
AT3600 User Manual
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Expand 1 Introduction1 Introduction
Expand 2 Getting Started2 Getting Started
Collapse 3 Test Program Editor3 Test Program Editor
3.1 Introduction
Expand 3.2 Schematic Editing3.2 Schematic Editing
Expand 3.3 Creating The Program3.3 Creating The Program
Collapse 3.4 Programming Tests3.4 Programming Tests
3.4.1 Continuity
3.4.2 Winding Resistance
3.4.3 Equivalent Series Or Parallel Resistance
3.4.4 Winding Inductance
3.4.5 Inductance With Bias
3.4.6 Quality Factor
3.4.7 Dissipation Factor
3.4.8 Leakage Inductance
3.4.9 Interwinding Capacitance
3.4.10 Turns Ratio
3.4.11 Turns Ratio By Inductance
3.4.12 Impedance Impedance With Bias
3.4.13 Inductance Match
3.4.14 Capacitance Match
3.4.15 General Longitudinal Balance
3.4.16 Longitudinal Balance
3.4.17 Insertion Loss
3.4.18 Frequency Response
3.4.19 Return Loss
3.4.20 Impedance Phase Angle
3.4.21 Inter-Winding Phase
3.4.22 Trimming Adjustment
3.4.23 Output To User Port
3.4.24 Insulation Resistance
3.4.25 Hi Pot (DC)
3.4.26 Hi Pot (AC)
3.4.27 Surge (Impulse)
3.4.28 Wattage
3.4.29 Wattage (External Source)
3.4.30 Stress Wattage
3.4.31 Stress Wattage (External Source)
3.4.32 Magnetizing Current
3.4.33 Magnetizing Current (External Source)
3.4.34 Open Circuit Voltage
3.4.35 Open Circuit Voltage (External Source)
3.4.36 Low Voltage Open Circuit
3.4.37 Leakage Current
3.4.38 Inductance With Ext Bias (Series Circuit)
3.4.39 Inductance With Ext Bias (Parallel Circuit)
3.4.40 Impedance With External Bias
3.4.41 Hi Pot Ramp (AC)
3.4.42 Hi Pot Ramp (DC)
3.4.43 Voltage Breakdown (AC)
3.4.44 Voltage Breakdown (DC)
Expand 4 Using the Server4 Using the Server
Expand 5 Fixtures5 Fixtures
Expand 6 Front Panel Operation6 Front Panel Operation
Expand 7 Tests and Test Conditions7 Tests and Test Conditions
Expand 8 Specification8 Specification
Expand 9 Warranty and Service9 Warranty and Service
Expand 10 Safety Systems10 Safety Systems

3.4.8 LL or LLO - Leakage Inductance

The Leakage Inductance for a particular transformer is tested by measuring the inductance of a ‘primary’ winding when one or more ‘secondary’ windings have short-circuits applied.

Select either ‘LL Leakage Inductance’ or ‘LLO Leakage Inductance with Offset’ from the available tests window, to display one of the following form fill-in dialogue boxes as appropriate.


LL (Leakage Inductance)                                            LLO (Leakage Inductance with Offset)

To program the test :

  1. Enter the signal and frequency required for the test.
    Note that the signal is normally entered as a current by selecting the ‘uA’ or 'mA' button; but you may optionally enter it as a voltage by selecting the 'mV' button.
    (Refer to Chapter 7 - ‘Test Conditions’, if you are unsure of the voltage and frequency to use.)
    Note also that the Measure button may be used here as outlined in section 3.9, with the combinations of test parameter specification shown in the following table:
    Signal Specified current Specified voltage Auto Auto
    Frequency Specified Specified Specified Auto
  2. Select (mouse click the button) the integration time you require.
    'Medium' is the default setting. 'Long' will give more stable readings (for tighter limits) at the expense of an increased test time, and 'Short' will test at the maximum speed, but may give a slightly noisier reading.
  3. Select the high and low terminals of the coil to be energized (primary terminals). By clicking on the arrow to the right of the fill-in box, you will be provided with a choice of possible terminals. Double-click on the name of the required terminal.
  4. Select the secondary high and low terminals.
  5. These terminals will be shorted out during the test. As the short-circuit applied via the relay matrix in the tester cannot be perfect, additional measurements will be made to these terminals to compensate.
  6. Select the additional low terminals.
    These terminals are also shorted out during the test, but they are not used in the compensation measurements.
    If only one secondary winding is to be shorted, then there will be no additional low terminals. If several windings are to be shorted, then the Secondary Terminals should be on the winding with the largest number of turns, and Additional Low terminals should be used for the rest.
  7. Select (mouse click the button) the type of limits you require and enter the values.
    % Enter a nominal value and then the limits as negative and positive percentage values.
    >< Enter minimum and maximum values.
    > Enter just a minimum value.
    < Enter just a maximum value.
    Note that the Measure button may be used here as outlined in section 3.9.
  8. Select whether a user offset is required (LLO test only) and enter its value if applicable. This value will be added to the measured value to give the returned result.
    Normally a user offset would not be required. However for small values of leakage inductance (<1μH) when there are a number of additional low terminals, it is not always possible during fixture compensation for the tester to remove all of the parasitic errors of the test fixture. In this case, the user offset may be required to fully remove the errors. The LLO test provides this additional feature.
  9. Select OK. The test specification will then be displayed in the program window.

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or
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