FM series and parallel resonant withstand voltage test device use precautions
1. Before using the HFJS series of series frequency-parallel resonant withstand voltage test equipment for the withstand voltage test, please measure the insulation resistance of the sample according to the test procedure, and confirm that the sample meets the relevant insulation requirements before entering the next withstand voltage test.
2. Before using the device to carry out the withstand voltage test and start the device, please re-check whether the wiring is correct. For example, the output end of the excitation transformer should be connected to the lower end of the reactor; and the upper end of the high-voltage output and the capacitor and voltage divider should be as far as possible. Leave it empty, do not approach the ground or surrounding objects to prevent high-voltage lines from being discharged to the ground. Because every time you make a small mistake, it will cause irreparable damage to equipment and personnel. And every time you correct it, how precious it is for the safety of the personnel and equipment on site;
3. Due to the consideration of personnel and equipment safety, the FM series-parallel resonant withstand voltage test device has higher requirements for grounding. When the substation grounding grid is connected, the grounding pile, the switch cabinet cabinet, the transformer casing dirt, rust, and paint should be connected before the connection to ensure the effective connection between the grounding wire and the grounding device. When the field operation is not grounded, the length can be used. 150CM metal rods and choose a place where the terrain is relatively humid. The metal rods should be buried in the ground no less than 120CM. If necessary, you can inject a proper amount of water. This will ensure the reliable grounding of the equipment more effectively.
4, equipment power supply should use two FireWire 380V, the instrument works 220V power supply FireWire should be connected with 380V FireWire. Try to avoid using equipment such as electric welders in the power line to prevent interference. When working with the generator power supply, the neutral line is grounded;
5, in the test, please strictly follow the operating procedures, namely: the first step, open the instrument power, enter the "Welcome" interface; the second step, press the confirm button to enter the parameter selection interface, select the parameters you want to set; Three steps, press the enter key to enter the test mode selection interface, move the cursor to manual / automatic and push the power switch on the left side of the instrument; the third step, after confirming the error, press the enter key, the instrument automatically enters the frequency selection, boost, In the fourth step, the instrument shows that the test is completed. (If you want to print the result, press the print button), press the return button; in the fifth step, disconnect the power switch on the left side of the instrument (this is extremely important); After six steps, confirm the safety, continue testing or disconnect the cable.
In actual operation, it was found that when the instrument has entered the third working state, the staff has forgotten to push the power switch on the left side of the instrument, and it is possible to push it by hand. This is very wrong; this is neither safe nor sensible to the device. The damage, the correct operation is: press the back button, starting from the second step.
6. A: When the instrument enters the third step of frequency selection, sometimes the instrument buzzer will sound “beep†and cannot be boosted. Please observe the number at the automatic frequency selection cursor. When it is at a higher frequency, return the instrument. To reset the starting frequency, increase the value and try again;
B: When the instrument enters the third step of frequency selection, sometimes the instrument buzzer emits a “beep†sound and cannot be boosted. Please observe the number at the automatic frequency selection cursor. At a lower frequency, return the instrument to the new one. Set the starting voltage, increase or decrease the value and try again;
C: When the instrument enters the third step of frequency selection, the frequency selection frequency at the upper end of the instrument display is higher than the set pre-test voltage, and the frequency may not be selected. Then return the instrument to reset the starting voltage, reduce the value to about 4% and try again; if necessary, change the series and parallel mode of the excitation transformer: retry by series and parallel.
7. The test article is discharged, and the instrument will return to the overvoltage protection, which will cause damage to the instrument, even though we have undergone numerous simulation tests or various protections. However, the process of discharge is a world-famous problem. In addition, there are many instruments in the field, the transportation environment, and the use environment are poor. Therefore, it is strongly recommended that you take measures to prevent earthquakes and dust, and read the "Precautions" in detail.
Concerned about surprises
Label: Precautions for use of FM series-parallel resonant withstand voltage test device
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