What are the operating methods and instructions of the transformer test bench?
1. Before starting up, connect the high-voltage side and low-voltage side terminals on the panel of the instrument to the high-voltage side and low-voltage corresponding terminals of the test product respectively, and carefully check that the wiring is correct. The instrument only has three-phase output voltage during the measurement process, and there is no output voltage and current before and after the measurement process, which is safe and reliable. 2. Automatically enter the main menu after power-on, select a different one according to the user's needs. Before starting up, connect the high-voltage side and low-voltage side terminals on the panel of the instrument to the high-voltage side and low-voltage corresponding terminals of the test product respectively, and carefully check that the wiring is correct. The instrument only has three-phase output voltage during the measurement process, and there is no output voltage and current before and after the measurement process, which is safe and reliable. 2. Automatically enter the main menu after power on, select different items according to the user's needs to measure according to the menu prompts. During each measurement, the instrument will automatically check the wiring for errors. If the wiring is incorrect, an error prompt menu will appear, and the measurement process will end. Please check the wiring and restart the measurement process. 3. 'Press any key to start measurement' in the prompt of the instrument menu (not the 'reset' key). 4. When the transformation ratio is greater than or equal to 10000, the instrument displays 'out of measurement range' and the measurement process ends. 5. During the measurement process, the instrument automatically saves the rated transformation ratio value entered last time. Measure under the condition that the input rated transformation ratio value is unchanged, and it is not necessary to re-enter the rated transformation ratio value. 6. When the instrument is measuring, if there is no abnormal situation, please do not press the 'reset' key or shut down. 7. Input operation of three kinds of parameters: a. Rated transformation ratio input, press 'Enter' key to enter transformation ratio input function, the initial value is 0000.0 at this time, press '↑' or '↓' key to change the size of the blinking digit of the cursor, press The 'Enter' key moves the cursor to the next digit until the ratio input is completed. For example, if you input 85.987, first press the 'confirm' key to display the value 0000.0, press the 'confirm' key to change to 000.00, then press the 'confirm' key to change to 00.00, press the '↑' key until it becomes 80.000, press the 'confirm' key to change to 83.446, move the cursor to the next 3, press the '↑' key until it becomes 85.446, press the 'Enter' key to move the cursor to the next 4, press the '↑' or '↓' key to change 4 to 9, Press the 'Enter' key again, and then operate the function keys by analogy to complete the ratio input. b. Transformer type selection When measuring the transformation ratio of a three-phase transformer, first press the 'OK' key to enter the 'transformer ratio measurement' menu. If the function 'transformer automatic measurement' is selected, the user selects the transformer type and presses ' There will be eight connection modes with the 'confirm' key. After operating the '↑↓ ← →' key to select the correct connection mode you need, press the 'confirm' key to perform the following measurement work. After the group measurement is completed, select 'continue' and proceed again. The following measurement work; if the function of 'three-phase transformer measurement' is selected, the user should first select the transformer type (the type selection method is the same as 'transformer automatic measurement'), and then press the 'confirm' key to select the group (group type). After the selection method is completed by operating '↑↓'), the three-phase transformation ratio can be measured. c. Calendar and clock setting and modification Select 'Instrument Function Settings' in the 'Main Menu↓← → Confirm' button to complete the calendar clock setting and modification. 8. After each measurement, the user can choose 'repeat' or 'print' as needed. When “repeat” is selected, the instrument repeats the last measurement, and when “print” is selected, the instrument automatically prints the test information and test date and time. 9. After the measurement is completed, please turn off the machine before removing the wire. 10. Test example (single-phase transformer measurement) In the main menu, select 'Rated transformation ratio input'Transformation ratio measurementThen the transformation ratio and polarity measurement of the single-phase transformer are automatically performed. 11. Instrument gain calibration The high-precision measuring instrument of the power system should be sent to the upper level measurement unit for verification every year or two years. When the calibration error of the instrument exceeds the standard or is used for a long time, the user believes that the credibility of the measured data decreases and the internal data of the instrument can be corrected (generally it can be done in the pilot plant). We recommend users to calibrate once every year or two years. $11.1 Equipment for instrument gain calibration: 1) An electronic AC voltage regulator, which provides a stable power supply for the instrument. 2) Disc type induction voltage divider box, the accuracy is better than 0.005. $11.2 Operation method: 1). Make the output of the electronic AC voltage stabilizer AC220V. 2). The electronic AC voltage stabilizer and the disc induction voltage divider box are grounded. 3). Select the switch position of the disc-type induction voltage divider box according to the standard ratio value displayed by the instrument. 4). Follow the prompt information output by the instrument.
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