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Triple Frequency Generator is composed of a three-phase five-limb transformer (or three single-phase transformers), a single-phase voltage regulator, reactors, and a control part. According to test requirements, the appearance can be integral or split push-type.
Test method for the Triple Frequency Generator:
1. Test
Before conducting the frequency-doubled induced voltage withstand test on the test object, a no-load test should be performed on this device first to check whether the device is intact.
Operation steps:
After confirming the wiring is correct, input three-phase voltage; turn on the power switch of the control box, and the green indicator light will be on (if not, please return the voltage regulator handle to zero); then press the start button, the red working light will be on, at this time you can start rotating the voltage regulator handle to increase the voltage, observe the voltmeter until the voltmeter reaches full scale. During this process, if there is no abnormal situation, it indicates that the device is normal. You should immediately return the voltage regulator handle to zero, and disconnect the power supply. The no-load test is completed.
2. Test
(1) Connect the Triple Frequency Generator, control box, reactor (if needed) and the test object;
(2) Carefully check the connected lines, confirm that the wiring between the test object and this device is correct, then input three-phase voltage. The operation steps are basically the same as the no-load test steps; when the voltage rises to the required voltage value of the test object, stop increasing the voltage and maintain for 40 seconds; if there is no abnormal situation, it indicates that the test object passes this test. At this time, you should immediately return the voltage regulator handle to zero, and quickly disconnect the three-phase power supply. The test is completed.
Triple Frequency Generator can not only perform external applied power frequency high voltage test on the main insulation of fully insulated transformers, but also perform induced high voltage test on the longitudinal insulation of transformers and the main insulation of semi-insulated transformers. It is generally used for power transformers, voltage transformers and other test objects.
In addition, for the safety of the instrument and operators during normal use, the instrument must be reliably grounded. When preparing for the test, connect the ground wire first; after the work is completed, remove the ground wire last. When the power is on, no one is allowed to plug or unplug any wiring. When outdoors, do not expose the instrument to direct sunlight for a long time. In addition to these points needing attention, transportation, storage, and other aspects should not be neglected.
Note: The above information and technical parameters are from Yangzhou Darui Electric Co., Ltd. and are published after compilation
