VOLTECH AT3600 USER MANUAL PROGRAMMING TESTS
TEST PROGRAM EDITOR VPN 98 - 024 PAGE 3.4.27.
4.14. C2 – CAPACITANCE MATCH
The Interwinding capacitance match test calculates the ratio between two capacitance
measurements on two groups of windings. It is measured by applying a specified ac
voltage between two separate windings and the voltage across and current flow
between the two windings is measured to obtain a complex impedance. This is
performed to the two groups in turn.
This test is suitable for switched mode power supply, audio and telecommunication
transformers. It checks that the windings are installed in the correct positions on the
bobbin.
On selecting "C2 Interwinding Capacitance Match" from the available tests window,
a dialogue box will be displayed.
To program the test:
1. Enter the voltage and frequency required for the test.
(Refer to Chapter 7 - ‘Test Conditions’, which lists recommended test conditions
for different values of capacitance.)
2. Select 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 terminals to be included for both high and low X test terminals.
4. Selecting Terminals [Y] prompts a second dialogue box allowing the second set
of windings to be configured for the test.
5. Set the capacitance limits.
6. Select OK. The test specification will then be displayed in the program window.
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