Connect the wires according to the schematic diagram. After checking that everything is correct, close the main power air switch. The green indicator light for the trip button will illuminate, and the fan will start. The LCD screen will display the following:
Following the prompts on the LCD screen, press the close button. At this time, the close indicator light (red) will illuminate, and the trip indicator light (green) will turn off. The LCD screen will display the following:
After waiting for about 30 seconds, the auxiliary relay will engage, and the LCD screen will display the following:
For variable frequency series resonance, press the confirm key to enter parameter setting as prompted on the LCD screen.
In the parameter setting state, the LCD screen will display the following:
At this time, the test voltage characters will flash. Follow the prompts on the right side of the LCD screen to set parameters. The flashing line is the current operation line. Press the ↑ key to increase the parameter, and press the ↓ key to decrease it. Adjust the test voltage to the value specified in the preventive and handover test regulations. Press the confirm key; then the start frequency characters will flash. The start frequency can be set arbitrarily within 30-300 Hz, using the same method. Press the confirm key; then the start voltage characters will flash. This item is for factory debugging and should not be modified by non-factory technical personnel. Press the confirm key; then the protection current characters will flash. Normally, set it above 30A. Press the confirm key again, and the display will show the following:
For variable frequency series resonance, set the transformation ratio according to the actual transformation ratio of the transformer, referring to the factory test report for specific values. Press the confirm key; then the operation mode characters will flash. Press the ↑ (or ↓) key to select "Automatic" or "Manual". Press the confirm key to enter the test time setting, with a range of 1 to 60 minutes.
If you want to reset a certain parameter, press the exit key to reset it. In the current time line, if you want to adjust the date or time, first press and hold the voltage adjustment key, then press the confirm key to enter the date/time adjustment. The modification method is the same as above.
After modifying the time, press the confirm key to enter the frequency adjustment interface.
Operation modes of the variable frequency series resonance test device
1. Manual mode: If "Manual" mode is selected, the LCD screen will display the following:
At this time, the real-time time is displayed in the lower right corner. Press and hold the ↑ key to increase the frequency, and press and hold the ↓ key to decrease it. Frequency adjustment is divided into coarse and fine adjustment. Press and hold the "Frequency" key for coarse adjustment, with a step of 1 Hz. When the frequency key is not pressed, it is fine adjustment, with a step of 0.1 Hz. The frequency adjustment range is from the set value to 300 Hz. During frequency adjustment, observe the test voltage. When the test voltage reaches its maximum, that frequency is the resonant frequency. Then fine-tune by repeatedly increasing and decreasing to reach the maximum. Press the confirm key to enter the voltage adjustment state.
The LCD screen will display the following:
Manual voltage adjustment is divided into coarse and fine adjustment. Press and hold the "Voltage" key and the ↑ (or ↓) key simultaneously for coarse adjustment. Press the ↑ (or ↓) key alone for fine adjustment. Press the ↑ key to increase the voltage, and press the ↓ key to decrease it. When the voltage reaches the set value, the test state will be entered.
