Voltage transformers can convert high voltages into standard secondary voltages with lower voltage levels, so that the voltage of the equipment can meet the rated voltage requirements. Moreover, they can effectively isolate high voltages from electrical operators to ensure the safety of operators. The device is based on the principle of electromagnetic induction, but its electromagnetic structure has its own characteristics.

Voltage transformers have a wide range of applications, especially in power plants, substations and other occasions involving transmission and power supply needs, it plays an important role. In electrical testing laboratories, it is also often used as a voltage, power and electrical energy detection instrument.

The device is very similar to a transformer in that its main function is to convert the voltage across the line. But the transformer conversion voltage, just in order to achieve the delivery of electric energy energy, simple effect, so the capacity is large, usually in kilovolt ampere or megabvolt ampere as a unit.

Conversion and voltage transformer voltage, often can have the effect of more complex, it first needs to detect surface and relay maintenance, so it needs to be used to detect circuit of voltage, power and electricity, in lines when an exception occurs, the equipment can be used to maintain the line, motor and transformer, so that the fault is reduced, Therefore, its capacity is relatively small, generally only a few volts ampere, dozens of volts ampere, even if the capacity is very large, usually not more than one kilovolt ampere.

Why does the voltage need to be converted on the line? This is because the situation of power generation, transmission and electricity use is different, leading to the size of the voltage on the circuit is not the same, especially in some cases, the difference between the two is very big, the high voltage can reach tens of thousands of volts or even hundreds of thousands of volts, and the low voltage is only 220V and 380V.

If you want to directly detect the low voltage and high voltage of the line, you need to produce the corresponding low and high voltage voltmeters or relays according to the size of the line voltage, but it is more difficult to directly detect the voltage in the circuit.

The function and application of voltage transformer

If the online access to the transformer on the road, and the voltage conversion, can be on a line of high voltage or low voltage according to certain share, together into several kinds of low voltage, so only need to use the relay or voltage standard equipment, such as voltage of 100 v itself, after using the transformer, can detect and monitor the voltage.

Therefore, the transformer can change the large voltage into small voltage, so that the small voltage can adapt to the application and relay maintenance of various equipment, and can effectively isolate the secondary system from the high voltage. It can not only make the equipment and relay production become standardized and simple, but also ensure the safety of equipment and people.

When used with ammeter, its primary purpose is to use small ammeter to detect large current. Therefore, the primary side needs to be connected to the circuit being tested, and the secondary side is connected to the ammeter. Pay attention to the ammeter's detection parameters when wiring, and make a good grounding protection device.

The secondary circuit of voltage transformer belongs to the high impedance circuit, and the secondary current should be determined by the impedance of the circuit. If the secondary load impedance decreases, the secondary current will increase, and then the primary current will automatically increase, so that the electromagnetic between the primary and secondary sides can be uniform.