One Installation of experimental transformer
1. Install the voltage equalizing ring above the transformer and secure it with screws.

2. During installation, pay attention to reliably grounding all equipment, and weld the grounding nut of the test transformer to the transformer base plate.

3. The high voltage end of the transformer is connected to the top voltage equalization ring through a dedicated high voltage line and coupling capacitor. Ultrasonic partial discharge tester

4. Test the transformer terminal at the bottom of the transformer, input a from left to right, input x, high voltage tail X, measure m1, measure m2, and the grounding post. They are transformer input winding, high-voltage winding tail, measurement winding, and grounding post.
5. The input terminals are labeled as "a" and "x". Connect the input terminals to the output terminals of the voltage regulator. The wires can be made of general plastic cables with a cross-sectional area of not less than 25mm2. The input line can be connected in series with an ammeter and a voltage transformer for measurement and protection, directly measuring the input current of the transformer.

6. The identification of the measuring winding terminal is "m1" and "m2". The rated voltage of the measuring winding is 1200V. Connect the ammeter of the corresponding range to measure the winding, and connect the tail end of the winding to the "m2" for reliable grounding.
7. When using the test transformer, the terminal marked with "X" at the end of the high-voltage winding must be well grounded. You can be present as needed. Connect a 5/5 voltage transformer and ammeter in series between the "X" terminal wires to directly measure the output current of the transformer. The transformer is primary, with one end connected to an "X" and the other end grounded; On both sides of the ammeter head on the secondary voltage side of the transformer.

8. For measurement accuracy and safety, the wire cross-section of the series voltage transformer should not be less than 2.5mm2, and the connection should be as short as possible; The ammeter cannot be directly connected in series between the "X" terminal and the ground wire.

II Application of Test Transformers

Please refer to the following process for the experiment:

Before each experiment, the test sample should be reliably grounded.

2. Confirm that the high-voltage wire is connected correctly before conducting the experiment.

3. Before powering on, check if the voltage regulator is at zero position, and note that the transformer must be transformed from zero position during testing.

4. All personnel must avoid the pilot area and notify all personnel on site. Ultrasonic partial discharge tester

After power on, the transformation process should be symmetrical and stable until it reaches the test voltage specified by IEC standards or national standards, and then record the time. During this process, pay attention to observing whether the test product has any abnormal conditions, such as abnormal sounds or flashing marks. If there is any abnormality, the pressure should be immediately reduced and the cause should be identified after the power is cut off.

6. After reaching the specified withstand voltage test time, gradually reduce the voltage to zero and then disconnect the test power supply.

Note: Avoid direct power-off during high-voltage testing.

For safety reasons, all equipment and test samples must be reliably grounded before conducting high-voltage tests.

Before determining whether the experimental system is reliably grounded, high-voltage experiments cannot be conducted.

III measure voltage

Measure the experimental voltage by measuring the winding resistance of the transformer.

1. Connect the ammeter to the m1.m2 end of the test transformer and ground the m end. The cross-sectional area of the wiring should not be less than 1.5mm2, and the connection should be as short as possible.

2. The voltage ratio between the measured winding and the high-voltage winding is 1:1000 (i.e. measuring winding 1) V voltage converted to high-voltage winding voltage of 1kV). The high voltage output voltage is 100kV, and the measured terminal voltage is 100V.

4 Using natural conditions and precautions

1. Suitable for altitudes not exceeding 2000 meters and high temperatures not exceeding+400 meters ℃. In commercial use, the relative humidity of the environment should not exceed 80% RH.

2. Suitable for indoor use.

3. It can operate continuously for 1 hour at the rated voltage and cannot operate under overvoltage or load conditions.

4. The voltage must be gradually increased to the experimental value through a voltage regulator and must not be directly connected to the power grid.

5. It should be stored in a non flammable place Indoor explosive and corrosive gases; It should be kept dry and clean to avoid the deposition and condensation of oil and dust.

6. All areas that require grounding must be firmly and well grounded. The grounding resistance of the grounding wire should be less than 1 Ω and not exceed 2 Ω. The grounding wire should be formed with a 40-60mm wide copper strip according to regulations to minimize impedance and prevent flashover from penetrating equipment and causing danger. Ultrasonic partial discharge tester

7. Window 25 # Great Wall brand transformer oil in the fuel tank.

8. Transformers should be careful to avoid strong vibrations and should be left to stand for 12 hours after moving.