① After measuring the inductive load, the test line cannot be directly removed to avoid endangering the safety of testing personnel and equipment due to inductive discharge. The output end of this machine is equipped with a discharge circuit. When the output is turned off, the inductance will release energy through the instrument. Only after the discharge indication is completed can the test wire be removed.
② For unloaded voltage regulating transformers, it is not allowed to switch the tap changer during the measurement process.
③ If the power supply suddenly cuts off during the measurement process, the machine will automatically start discharging. Please do not disassemble the wiring immediately, wait at least 30 seconds before disassembling the wiring.
④ During measurement, do not short-circuit and ground other untested windings, as this may slow down the transformer magnetization process and prolong the data stabilization time.
⑤ Before starting the machine, please check the power supply voltage: AC 220V ± 10% 50Hz.
⑥ Please confirm that the tested equipment has been powered off and disconnected from other live equipment during the test.
⑦ The casing must be reliably grounded during the test.
⑧ During the experiment, unrelated items are not allowed to be stacked on or around the equipment panel.