C H A P T E R 1 3 – T E S T F I X T U R E S
AT5600 User Manual 98-119 issue 14 Page 269
the surface between them is scrupulously clean, and that a separation of at least
3 mm per kV is used.
13.6.2. Kelvin Connections
Always use Kelvin connections (see section 13.4). In addition, when measuring
very low transformer impedances, make sure that the Kelvin connections are
continued through the terminal to the transformer leads.
13.6.3. Mechanical Problems
Always use terminals, sockets or probes that are mechanically robust. Poor
mechanical connections can affect the measurements, and hence your
throughput and quality of product.
In use, clean the fixtures and connectors regularly, to avoid any build-up of dirt
and transformer varnish. Dirty fixtures give poor contacts and poor insulation
resistance between contacts, and could reduce the quality of your product.
Use a separate fixture for each type of wound component, as this can improve the
testing throughput.
Design the fixture so that the connections to the component under test can be
made quickly and easily. One example is to use guides to ensure that the
component cannot be put on to the fixture the wrong way around.
It is most important that when removing insulation from single core wire that the
conductor does not get marked or damaged when stripping as this will fracture in
time when in use.
13.6.4. Cleaning Test Pins
The test pins on the bottom of the test fixture can also tarnish with age, and
accrue dirt and grease from the manufacturing environment.
Voltech recommends Chemtronics Pow-R-Wash VZ for cleaning the test pins/
https://www.chemtronics.com/pow-r-wash-vz
To Next Page
Loading...
Need help?
General
