English
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GDKC-2000
GOLD
Many on-site engineers have encountered the embarrassment of using a regular resistance tester to measure on load tap changers, resulting in many waveform spikes and inaccurate timing, especially for transformers with delta connections, where the problem of three-phase asynchrony cannot be seen at all.
What's even more troublesome is that after the test, you have to manually calculate the data and draw the waveform, tinkering with one gear for half an hour. If encountering a switch that has not been activated for a long time and poor contact caused by the oxide layer, ordinary instruments will directly report it as equipment failure, wasting maintenance time.
This on load tap changer analyzer is specifically designed for transient waveform analysis of on load tap changers. It comes with a 30kHz sampling rate and a time resolution of 0.1ms, which can clearly capture every transition process - R1 connection, dual resistor parallel connection, R2 holding, and then to the end of the transition.
Three phase waveform displayed on the same screen, Y0、Y、 Three types of connection methods are automatically calculated, and the synchronization deviation can be seen at a glance. And the instrument will intelligently mark abnormal waveform locations such as breakpoints and spikes, so you no longer have to stare at the curve to guess where the problem lies.
It can be tested with or without windings: there is no need to disconnect the wires on site, just connect the transformer bushing directly, and the non testing side can be short circuited and grounded to start.
Continuous testing without stopping: Select the "automatic shifting" mode, and the instrument will continuously output current. You only need to operate the tap changer, and the data will be automatically recorded. Dozens of gears will be tested in a day.
One click report generation: After testing, a Word report will be generated directly, including time, resistance value, waveform diagram, and the link column has been reserved for you.
1) Three phase constant current source charge,charge current: 3A/1A; 0.6A/0.2A
2) Maximum voltage of the port: 24V
3) Maximum range of transition resistance: 100Ω
4) Measuring range: 1A:0.4Ω～20Ω 0.2A:10Ω～100Ω
5) Record time of waveform:300ms
6) Sample rate: 30k
7) Resolution of time:0.1ms
8) Resolution of resistance: 0.1Ω
9) Accuracy of transition resistance: ±5%, Reading±0.1Ω
10) Accuracy of transient time: ±0.5%, Reading±0.2mS
11) Temperature: -10-40℃ Humidity: <85%RH
Characteristic Function | Description |
Automatic fault marking | white circle warning displayed at abnormal waveform locations |
Waveform scaling | Click the zoom in button to view high-resolution curve details |
Three phase sorting | Can focus solely on phases A/B/C and conduct independent analysis |
Operation display interface
Annual inspection of substation main transformer: During annual power outage maintenance, quickly complete the transition waveform test of the on load tap changer of the transformer to determine contact wear and transition resistance aging.
Debugging of newly installed transformer: Conduct the first action test after installation to confirm that the three-phase synchronization meets the requirements and avoid putting it into operation with defects.
Post fault diagnosis: After abnormal switch action and protection action, use this instrument to check the transition waveform and find the stuck or arc breaking point.
