Does using a transformer save power? Does the transformer cost a lot of electricity?

It is to convert the ultra-high voltage into a low voltage that is not harmful to humans, so that it is convenient for safe measurement, rather than saving electricity.

The function of the transformer is to reduce the AC voltage and high current to a value that can be measured directly by the instrument, which is convenient for the instrument to measure directly, and at the same time provides power for relay protection and automatic devices. The performance of the transformer directly affects the accuracy of power system measurement and metering and the reliability of the operation of relay protection devices.

The use of transformers is not directly related to power saving.

The transformer, also known as the instrument transformer, is generally divided into two types: current transformer and voltage transformer. It can turn high voltage into low voltage and high current into small current for measurement or protection system. Its function is mainly to convert high voltage or high current into standard low voltage (100V) or standard small current (5A or 1A) in proportion, so as to realize the standardization and miniaturization of measuring instruments, protective equipment and automatic control equipment.

At the same time, the transformer can also be used to isolate the high-voltage system to ensure the safety of people and equipment!

For example, if a 10kw device works for one hour, the watt-hour meter measures 10 kWh, and after the transformer is installed, the 10kW motor works for one hour, and the watt-hour meter measures the power (after unit conversion) will be 10 kWh. There may be some loss in it, but it's small.

For example, the loss of the transformer itself, the accuracy of the watt-hour meter and the transformer, etc., will directly affect the measurement accuracy.

The installation of the transformer is not a question of whether to save electricity, because the current is too large to be directly measured, measured and protected, so the transformer should be used to convert the large current into a small current.

It depends on whether your transformer and the line are in close contact or in the middle, and if it is tight, it will save power.

If you can measure directly, you don't need a transformer, and the transformer is already lossy.

The transformer is divided into two types: metering and protection, and the current transformer is generally tens of VA, which can carry a certain load.

When the current or voltage reaches a certain level, it cannot be measured directly, and it is necessary to use conversion and isolation equipment, which can also make the secondary equipment work safely and reliably.

The transformer itself is equivalent to an inductive load;

In general metering, when the current is relatively large (such as even higher), we will consider installing a transformer; Generally, small users can directly install electronic meters, and the meter loss of electronic meters is relatively small.

We can't do without electricity in life, and in the process of using electricity, we need to use some instruments, such as a transformer called current, do you know what this is? How does it work? And what are the types of Cashier?

If the transformer model selected is relatively large, will it consume electricity? If you're interested in this, take a look at this article.

1. What is a transformer?

In AC circuits, sometimes the current is relatively large, and then we can use a current transformer to reduce the current. Because in the process of the circuit, it is necessary to generate and transmit electricity, and it is used for different electrical equipment, and the current may be tens of amperes, or even tens of thousands of amperes, which will be accompanied by high voltage, at this time, it is necessary to measure the situation of these circuits to prevent the occurrence of high voltage and high current, which requires the use of current transformers, so its role is still very large.

Second, the classification of current transformers.

According to the model of the current transformer, it has a lot of classifications, and we can distinguish them by letters, for example, there is a letter A, which refers to the current transformer. If it is represented by the letter L, it is a wall-piercing transformer. There is also a Z letter, which is a pillar type transformer.

There is also a type of epoxy resin-cast transformer, which has a wide range of types.

Third, the role of the current transformer.

The biggest function of the current transformer is that it can convert the current of the relatively large front into a relatively small current through a certain conversion in the circuit, so as to protect the circuit and also play a role in measurement.

For example, if it is a current of 400 amps, it can be converted into a current of 5 amps by means of a current transformer.

Fourth, does the current transformer cost too much?

1. Although there are many models of current transformers, the current it generates is not the same, but when working, the current generated is relatively small, so it does not consume much electricity, and naturally it will not consume more electricity, so there is no need to worry about this.

2. When we choose a transformer, it is not that the bigger the better, nor the lower the better, but we should choose the appropriate transformer according to the electricity consumption of the family.

The above points are about what is a transformer and the types of transformers and related functions, and more importantly, it is important to understand that the power consumption of transformers is actually very small and cannot produce much electricity.

The function of the current transformer in the circuit is to slip the large current or convert it into a small current into the meter metering according to the ratio, so that the current is easy to measure and has nothing to do with power saving. Reminder: Generally, the total current exceeds 30kw and the transformer needs to be installed, when the letter slag Wu electric energy meter is connected through the transformer, your electricity bill will be multiplied by the ratio of the current transformer to calculate.

The voltage of the directly connected electric energy meter will be reduced [because there is an inductance coil car and family in the machine ring electric energy meter, and there is a voltage divider resistor in the electronic shed collapse electric energy meter, so the voltage will be reduced. However, it can be ignored and the disadvantages are ignored] The voltage of the transformer will not be reduced. Today's transformers are all heart-piercing, and the wires pass directly through the transformer, and there is no inductance coil and divider resistor, so the voltage will not be reduced.

Yes. Voltage mutual inductance converts a high voltage into a base voltage.

The reverse installation of the three-phase four-wire transformer has an impact on the meter, and for the mechanical meter, it will cause the meter to reverse.

The three-phase four-wire electric energy meter has 10 terminals, and the current transformer has: P1 and P2.

Improper wiring of the transformer to the meter can be reversed.

When the power cord passes through the transformer P1, S1 is connected to the incoming end of the meter, and S2 is connected to the outgoing end, which is called positive connection; Pick up in order.

The terminal is connected to the S1 outlet of the current transformer The terminal leads a wire out from the power line and connects the terminal to the S2 outlet of the current transformer 10 connects to the neutral line, if it passes through P2, S1 is connected to the outlet end of the electricity meter, and S2 is connected to the incoming terminal, which is called reverse connection. Pick up in order.

The terminal is connected to the S1 outlet of the current transformer, the terminal is connected from the power line, a wire is drawn out, the terminal is connected to the S2 outlet of the current transformer, and the zero line is connected to the zero line, and the meter of the two wiring modes is rotated, and the meter is reversed when the above wiring is violated.

It should be noted that, in general, the front connection is selected, and one side of the surface of the current transformer is marked with the P1 logo, and when installing, this side should face the power supply side.

2. The current line (the outgoing line S1 and S2 of the transformer) must correspond to the phase sequence of the voltage line (the line drawn from the power line).

3. Pay attention to the transformation ratio of the transformer and the number of turns through the center.

The meter rotates forward in both wiring methods, and reverses when the above wiring is violated.