Which voltage is higher in the 1st gear, 2nd gear, and 3rd gear of the S11 transformer

If the voltage on the high-side does not change, the output voltage of the tap-changer on the low-voltage side of the 3rd gear is higher.

The principle is as follows: 1. Generally, the function of non-excitation tap-changer (including on-load voltage regulation) is: when the voltage on the primary side (often the high-voltage side) fluctuates within a certain range (for example, without excitation voltage regulation, the high-voltage side is within the 5% fluctuation range), it is only possible to stabilize the output voltage within the allowable range.

2. Therefore, it is often the high-voltage coil in the first gear that has the most turns. 2 gears are rated. 3 stops have the least number of turns.

When the voltage on the high side is high, the tap changer should be placed in 1st gear and when the low voltage is low, it should be placed in 3rd gear. Of course, when the voltage on the high-voltage side remains the same, you adjust the tap-changer from 1st to 3rd gear, which changes the ratio of turns of the high-voltage and low-voltage coils, so that the voltage on the low-voltage side increases.

Hello:Our common S11

Three voltage levels.

The primary line voltage is too high.

9500 V to ensure that the output voltage is normal kV

Of course, the voltage of the 3 gears is high, each gear is 15V higher, and there are also 25V higher than each gear, which is different.

Transformer 1st gear and 3rd gearWhich gear is the most energy-saving transformer's 123 gears, and which gear outputs a lower voltage?

Dear, hello, the first gear of the transformer is more power-efficient than the third gear. In the first gear of the transformer, the output voltage is relatively low. This is because there is a certain relationship between the gear of the transformer and the input voltage and the output voltage.

Generally speaking, the higher the gear of the transformer, the higher the output voltage. The output voltage is directly related to the energy consumption of the transformer, and the higher the output voltage, the greater the energy consumption of the transformer. Therefore, under the first gear of the transformer, the output voltage is relatively low, and the energy consumption of the transformer is relatively low, so as to achieve the effect of energy saving.

In the third gear, the output voltage is higher, and the energy consumption of the transformer is relatively large.

1. The tap changers are arranged on the high-voltage side. In this way, the current through the tap-changer can be smaller, and the voltage regulation accuracy can be higher.

2. There are two kinds of tap-changers, 3 gears and 5 gears, and the original gear (rated voltage gear, manufacturer connection) is in the middle.

3. It is the highest gear (the first gear, the representative number is the smallest value, such as the first gear in the three-gear tap-changer) is connected to the highest voltage in the high-voltage coil, that is, the gear with the largest number of turns in the high-voltage coil.

4. The lowest gear (the last gear, the representative number is the largest value, such as the third gear in the three-speed switch) is connected to the lowest voltage gear in the high-voltage coil, that is, the gear with the least number of turns in the high-voltage coil.

5. Under normal circumstances, the middle gear (such as the second gear in the three-gear switch) is connected to the rated voltage value of the high-voltage coil.

6. When designing, it is designed according to the output rated voltage, such as 10kV 400V transformer, designed according to the output rated voltage of 400V. When the input voltage is close to about 10500V, the tap changer should be adjusted to 1st gear, the voltage ratio is 10500 400, and the output of the transformer is 400V; When the input voltage is close to about 10000V, the tap changer should be adjusted to 2 gears, the voltage ratio is 10000 400, and the output of the transformer is also 400V; When the input voltage is close to about 9500V, the tap changer should be adjusted to 3 gears, the voltage ratio is 9500 400, and the output of the transformer is still 400V;

7. When using the adjustment, it is also adjusted according to the output voltage of the rated voltage of 400V. The regulations stipulate that if the three-phase power supply of 10 thousand volts and below is provided, the allowable deviation of the voltage is 7% of the rated voltage.

The rated voltage of the transformer is 400V, the upper limit of the allowable voltage deviation value is 400+400X7%=428V, and the lower limit of the allowable voltage deviation value is 400-400X7%=372V. Therefore, when the output voltage of the transformer is about 400V, the tap-changer remains unchanged in the original gear; When the output voltage of the transformer is often close to or greater than 428V and above, adjust the tap changer to 1 gear, and the output voltage will be reduced by 5% (428x5%=, reduce the operation; When the output voltage of the transformer is often close to 372V, adjust the tap-changer to 1st gear, and the output voltage will increase by 5% (372x5%=, increase by 18V operation).

8. The principle of three gears and five gears is the same, the fifth gear is an improved type of three gears, and the five gears increase or decrease the original 1 gear by 5% to increase or decrease, adjust the number of gears, make the output voltage more stable, and improve the quality of power supply.

1. S11 is an oil-immersed transformer, under normal circumstances, each coil on the high-voltage side has 5 taps, which are connected to the tap-changer on the high-voltage side of the transformer. Voltage regulation is carried out by adjusting the position of the tap-changer.

2. If it is a KV distribution transformer, the previous S7 and S9 transformers are usually 3 levels of tap conversion (5%). The transformer of S11 and later is usually 5-step voltage regulation ( .

The general situation of gear regulation is -5%, 0% (rated gear), + and +5%. You can also see that the range of pressure regulation has not changed, it is still; ±5%。It's just that the pressure regulation is more fine. It is more suitable for demanding transformer load equipment.