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Attentions
Please read carefully the Instructions for the transformer winding deformation tester!
Operators must read carefully the Instructions before use.
The tester is applicable to testing of transformer winding deformation with frequency
response method.
Equipment irrelevant to the tester cannot share power supply terminal with the tester.
Power supply of the system must be provided with reliable grounding to prevent the risk of
electric shock.
Operators cannot leave the test site in the process of equipment operation.
The transformer core must be reliably grounded with enclosure. Shell of tester and shell of
measuring impedance must be reliably grounded with transformer enclosure.
Please do not start test before “ground” of the tester is correctly connected.
Please fully discharge terminal of the transformer to be tested before test.
Before use, please check appearance of the tester and check whether its power switch is at
“closed” position and every wiring terminal is normal.
Winding deformation test must be carried out on the conditions that all leads of the
transformer (including overhead line, enclosed busbar and cable) are disconnected and far from
the transformer bushing to the extent possible (surrounding grounding body and metal
suspended solids must leave the transformer casing by more than 20cm), especially for the
transformer connected with enclosed busbar.
Correctly record positions of tap switches before test and put tap switches of the tested
transformer at the first tap as far as possible, especially for the on-load regulating transformer, in
order to achieve complete winding information. For no-load regulating transformer, make sure
every measurement is made at the same tap position for easy comparison.
Make sure wiring clamp of the measuring impedance tightly contacts bushing clip. In case of
conductive paste or rust on the bushing clip, scrub it clean with abrasive cloth or dry cotton
cloth.
Do not start any software irrelevant to measurement while using the tester.
The tester with use of general operating system has the risk of system bug and collapse.
