Dear friends, if you want to buy a batch of three phase power and electrical instruments Three phase

Measurement function. It can measure all the commonly used power parameters in the three-phase power grid system with high precision: three-phase voltage, three-phase current, active power, reactive power, power factor, grid frequency, active energy, reactive energy, and has the function of communication interface and electric energy pulse output.

Modbus-RTU communication protocol is used to realize LED field display and remote RS-485 digital communication. It has the characteristics of easy installation, simple wiring, convenient maintenance, small engineering quantity, on-site programmable setting of input parameters, etc., and can complete the networking communication of PLC and industrial control computers that are different from the industry.

Measurement: three-phase voltage, current, active power, reactive power, power factor, frequency, active energy, reactive energy.

Metering: forward and reverse active energy, inductive capacitive reactive energy.

Display: Three-row LED digital tube display, high visibility.

Communication: RS485 communication, modbus-rtu protocol.

Output: 2 electrical pulse outputs (pulse constant 10000imp kwh).

Expansion: Signals can be directly accessed from current and voltage transformers, and input parameter ratios can be set programmable in the field.

Optional: Analog 4-20mA transmission output, number of switches, switching output, upper and lower limit over-limit alarm functions can be added.

Purpose: It is suitable for the complete monitoring and management of electrical parameters in various incoming circuits and large-capacity distribution circuits.

Precautions. 1. Before use, the instrument needs to be powered on for 15 minutes.

2. Pay attention to prevent vibration and impact, and do not use it in places with excessive dust and excessive harmful gases.

3. The input wire should not be too long, if the input end of the signal under test is long, please try the twisted pair shielded wire.

5. When stored for a long time and not in use, please power it on once every three months for no less than 4 hours.

6. Long-term storage should be avoided from direct light, and should be stored at ambient temperature -25 °C 55 °C

7. If the instrument is not displayed, check whether the auxiliary power supply and voltage are within the range.

8. If the display is abnormal, check whether the input signal is normal and whether the signal terminal is tightened.

9. Unless PT has sufficient power, PT signal cannot be used as an auxiliary power supply at the same time to ensure the normal operation of the instrument.

10. The screws of the current terminal in the CT circuit must be tightened to ensure that the contact between the incoming and outgoing lines is reliable to avoid failure.

11. If the instrument is to be calibrated, the calibration instrument should be superior to the grade in order to ensure the calibration accuracy.

Like this, you can also buy one online, ** are more favorable, you can.

You can go to the brand's store to consult, or go directly to Delixi and other big brand stores to buy.

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If you want to buy a batch of three-phase electric power and electrical instruments, do you have a good recommendation? You'd better buy this regular shopping mall is a qualified product, as long as you have a certificate of conformity.

Ladies and gentlemen, if you want to buy a batch of three-box power electrician meters and three-box integrated power meters, do you have a good recommendation? You'd better ask a professional electrician so that he can give you the best recommendation.

Three-phase electricity meter: three-phase four-wire active and reactive energy meter The electromagnetic component is a separate structure, the voltage movement adopts a closed sample movement made of whole punching, the rotation system is statically balanced, and its bearing is a double-jewel structure with a shockproof spring, and the damping element is made of aluminum-cobalt 34 magnet, and the temperature compensation is made of thermal magnetic alloy sheet. The watt-hour meter is synthesized by voltage and current elements to generate and move into the magnetic field, so that the disk rotates under its action, and the speed of the disk is proportional to the size of the load current, so as to achieve the purpose of measuring electric energy.

Single-phase meter: Since the magnetic flux is proportional to the voltage and current in the circuit, the rotation of the aluminum disc is proportional to the electrical energy consumed in the circuit, that is, the greater the load power, the faster the aluminum disc rotates. The rotation of the aluminum disc passes through the worm drive counter, and the counter automatically accumulates the actual energy consumed in the line.

The single-phase meter measures the amount of electricity in a single phase, and you want the amount of electricity in three phases, and the result of a single-phase measurement is multiplied by 3 to be the value of the three-phase measurement.

380*(meter power 380)*3 square root.

Summary. Hello pro is happy to answer for you: three-phase three-wire active energy meter and three-phase four-wire active energy meter can not be used, otherwise there will be errors in measurement.

A three-phase four-wire active energy meter can be used to measure the active energy of a three-phase three-wire circuit. Because the structure is complex and the cost is high. Generally, it is not necessary to measure it this way.

The three-phase three-wire active energy meter can only measure the electric energy consumed by the three-phase symmetrical load equipment. (It can measure single-phase 380V electrical equipment, such as AC welding machine, etc., but it should be connected to the phase, and if it is connected to phase B, the electricity will be missed). The three-phase four-wire active energy meter can provide two voltages at the same time, which basically meets the needs of users.

Can the three-phase three-wire active energy meter and the three-phase four-wire active energy meter be interchangeable?

Hello pro is happy to answer for you: three-phase three-wire active energy meter and three-phase four-wire active energy meter can not be used, otherwise there will be errors in measurement. A three-phase four-wire active energy meter can be used to measure the active energy of a three-phase three-wire circuit.

Because the structure is complex and the cost is high. Generally, it is not necessary to measure it this way. The three-phase three-wire active energy meter can only measure the electric energy consumed by the three-phase symmetrical load equipment.

(It can measure single-phase 380V electrical equipment, such as AC welding machine, etc., but it should be connected to the phase, and if it is connected to phase B, the electricity will be missed). The three-phase four-wire active energy meter can provide two voltages at the same time, which basically meets the needs of users.

Can a three-phase four-wire energy meter be used as a three-phase three-wire energy meter?

Hello dear, this is possible, but there are hidden dangers. The three-phase four-wire meter has four lines, which are three live wires and a zero line, which is also feasible to be directly used as a three-phase three-wire meter, and the remaining zero line ports do not need to be connected, which will not affect the use, but in this case, the load imbalance of the line will lead to inaccurate metering. Therefore, for the sake of electricity safety, it is still necessary to install a neutral line.

1. Difference in scope of application: three-phase meters are suitable for small and medium-sized businesses, distribution networks, industrial and mining enterprises, public facilities, civil buildings, etc. Single-phase electricity meters are suitable for residential users and rental users with local fee control.

2. Difference in accuracy level: The accuracy level of three-phase meter is level 1, grade and grade. The accuracy level of single-phase meters is level 1 and level 2, and single-phase meters can only achieve the accuracy of level 1 at most, but three-phase meters can achieve levels and levels.

3. Difference in reference voltage: there are many voltage specifications of three-phase meters: 3*220 380V 3*.

There is generally only one voltage specification for single-phase meters, which is 220V. Extended Information: Notes:

1. Before the equipment is powered on, reliable grounding should be ensured. 2. Before the equipment is powered on, you should confirm what state the UA external power supply power supply selector switch on the panel is in: the switch is pressed to provide the working power of the equipment through UA and U0, and the power supply range is AC80V-400V, in this state, it is strictly forbidden to insert the power cord into the external 220V socket.

3. It is strictly forbidden to repeatedly press the UA external power supply selection switch when the equipment is powered on.

4. It is strictly forbidden to touch the terminals on the panel with your hands when the equipment is powered on.

5. Connect the test wire correctly, set the current input mode correctly, and enter the current and voltage within the corresponding limit. Remember that the current input value must not exceed 120% of the rated value of the selected terminal.

The standard for power generation systems is three-phase power supply.

In the theoretical use of electricity, there is a three-phase balance, which can reduce the power loss (power factor).

It will save electricity compared to two-phase electricity.

If it's a household electricity, because the amount of electricity is small, it can be almost ignored (that is, there is not much difference).

If it is industrial electricity, good power distribution can reduce a lot of unnecessary losses, and there is a power-saving effect.

Summary. 1. The three-phase three-wire active energy meter and the three-phase four-wire active energy meter cannot be used together, otherwise there will be errors in the measurement.

2. The electric energy meter is an instrument used to measure electric energy, also known as the watt-hour meter, fire meter, and kilowatt-hour meter, which refers to the instrument for measuring various electrical quantities.

3. In daily life, the contact load, such as lights, televisions, refrigerators, electric fans and other household appliances and single-phase motors, are connected to the circuit with two wires when working, which are single-phase loads. In the case of three-phase four-wire power supply, multiple single-phase loads should be connected to the three-phase circuit as evenly as possible, rather than being concentrated in the one-phase circuit of the three circuits. If the impedance and properties of the load connected to each of the three-phase circuits are the same, the loads in the three circuits are said to be symmetrical.

Under the condition of load symmetry, because the phases between the currents of each phase are 120° different from each other, the sum of the currents flowing through the center line at each moment is zero, and it is possible to remove the center line and use the three-phase three-wire system for power supply.

Can the three-phase three-wire active energy meter and the three-phase four-wire active energy meter be interchangeable?

1. The three-phase three-wire active energy meter and the three-phase four-wire active energy meter cannot be used together, otherwise there will be errors in the measurement. 2. The electric energy meter is an instrument used to measure electric energy, also known as the watt-hour meter, fire meter, and kilowatt-hour meter, which refers to the instrument for measuring various electrical quantities. 3. In daily life, the contact load, such as lights, televisions, refrigerators, electric fans and other household appliances and single-phase motors, are connected to the circuit with two wires when working, which are single-phase loads.

In the case of three-phase four-wire power supply, multiple single-phase loads should be connected to the three-phase circuit as evenly as possible, rather than being concentrated in the one-phase circuit of the three circuits. If the impedance and properties of the load connected to each of the three-phase circuits are the same, the loads in the three circuits are said to be symmetrical. Under the condition of load symmetry, because the phases between the currents of each phase are 120° different from each other, the sum of the currents flowing through the center line at each moment is zero, and it is possible to remove the center line and use the three-phase three-wire system for power supply.

So it can't be universal.

Good afternoon, and glad to answer for you. Single-phase and three-phase meters use the same electricity When the single-phase meter and the three-phase meter are both direct-entry meters, the electricity consumption of the two is the same, as long as the value on the meter display is directly read. The electricity consumption of the three-phase meter is greater than that of the single-phase meter After the single-phase meter and the three-phase meter are connected to the transformer, there is a difference in the electricity consumption of the two, and the electricity consumption of the three-phase meter will be more after the transformer is connected.

After the three-phase meter is connected to the transformer, the calculation of electricity consumption should be linked to the parameters of the transformer, and the actual electricity consumption = meter degree * multiple of the transformer. I hope mine can help you.