Why is the use of inverter for fan and pump loads to save energy?
According to the basic laws of fluid mechanics, it can be seen that the fan pump load is a typical square rotation load, and its main characteristics are: the speed n has the following relationship with the torque T and the load power P: T∝n2, P∝n3. That is, the torque is proportional to the square of the speed, and the power is proportional to the cube of the speed. Usually the load of the fan pump is mostly selected according to the amount of full load operation, and most of the time in practical application is not in the full load condition, so as long as the average speed decreases slightly, the load power will drop very quickly, so as to achieve energy saving.
But when choosing the motor direct starting method, because the speed can not be adjusted, the wind baffle, the valve are commonly used to regulate the air volume or flow, so that not only the waste of power is formed, but also because the excessive starting current forms the power grid impact and the vibration and water hammer phenomenon of the equipment, when the frequency converter is selected to regulate the speed, the speed can be conveniently controlled according to the practical process requirements.
For example, when the motor speed is 80% of the extra speed, the load power is the third power of the extra power (80%), that is, about 50%. In this way, it can be seen that the speed is reduced by 20%, and the energy saving is more than 40%. At the same time, it can be easily realized closed-loop constant voltage control, and the energy-saving power will be further improved. The use of inverter avoids the impact on the power grid when starting, reduces the equipment failure rate, eliminates the sensation and water hammer phenomenon, extends the service life of the equipment, and also reduces the capacity requirements and reactive power loss of the power grid.
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Schneider electrical circuit control fault range
In general, depending on the phenomenon of equipment problems, the scope of the problem can be roughly confirmed as follows:
1) All button functions fail, and there is a high possibility of power supply or fuse problems.
2) Some buttons are invalid, and some of the buttons are functioning normally ...
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Schneider ATV series inverter used as inverter power supply?
Can Schneider ATV series inverter be used as a variable frequency power supply?
No, you can't. The inverter is a control device designed according to the characteristics of the communication asynchronous motor, and cannot be used as a variable frequency power supply.
The entire circuit of the variable frequency power supply is composed of a ditch ...
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Safety PLC is different from ordinary PLC
A safety PLC differs from conventional PLCs in that it needs to be certified for safety by a third-party professional organization and meet stringent international standards for safety and reliability. There is a need for a thorough systematic approach to the planning and testing of safety PLCs. TUV*** in Germany and FM*** in United States ...
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Schneider inverter Eplan file download
Product line:
Frequency converters and soft starters
Solution(s):
All Eplan software users can visit the Eplan website (directly from the Eplan software). The EPLAN database includes ...
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Introduction to Schneider inverter inverter
The inch movement in Schneider inverter means that the control signal can drive the motor intermittently according to a certain law, and the motor strictly follows the dynamic and stop command action of the control signal, and the motor does not roll by inertia during the shutdown. It's like moving an inch and then stopping.
The full name of Schneider inverter is "...
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Schneider PLC series features
Schneider TSX08 series NEZA PLC
It is a small PLC with abundant functions, small size, strong general-purpose type, and high cost performance.
NEZA series adopts a new generation of handheld programmer, and the operating system adopts PL707-WinCE to support Chinese interface. In the process of use, whether it is ...
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The operation essentials of Schneider disconnectors
Schneider Barrier Features: First of all, Schneider Barrier Switch can be used to block the power supply, it can disconnect the live equipment from the high-voltage maintenance equipment, and it can also see a significant disconnection point on it. The second is that Schneider Barrier Switches are able to work with circuit breakers to reach the point where the operation of the system is changed.
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Schneider inverter debugging steps and brief description
Commissioning process of the Schneider 61 series
1. Preparations
1. Measure insulation. Connect the power supply side (R.S.T) and the motor side (U.V.W) of the inverter
Disconnect the cable, insulate the cable with a 500 megaohm or 1000 megaohm shake meter, and if it meets the requirements, restore it.
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The difference between an inverter and a servo drive – Schneider
In terms of frequency converters:
The abbreviated inverter can only regulate the speed of the communication motor, and the open-loop or closed-loop can be determined depending on the control method and the inverter, which is the traditional V/F control method. Now many of the frequency conversion has been set up by mathematical models, which will communicate electricity ...
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Introduction to the core knowledge and application of instrumentation - Schneider
Although the "measurement and control skills and instruments" category of majors touch the fields of national defense, aerospace, aviation, sailing, railway, machinery, light industry, chemical industry, electronics, electric power, telecommunications, metallurgy, petroleum, mining, geology, surveying and other industrial, agricultural and scientific research categories, the Ministry of Education has a special understanding of "measurement and control skills and instruments".
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Advantages and disadvantages of orifice flowmeters – Schneider
The orifice flowmeter is a high-range ratio differential pressure flow device composed of a standard orifice plate and a multi-parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter and pressure transmitter), which can measure the flow rate of gas, steam, liquid and natural gas. Widely used in petroleum, chemical, metallurgy, electric power ...
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Heat dissipation strategy for frequency converters – Schneider
Drives power and operate commercial and industrial motors, and thermal protection is necessary in accordance with their planning and operating environment. The main advantages of the frequency converters are flexible handling, smooth start-up and shutdown functions, and significant energy savings due to centrifugal fans and pumps operating under variable loads. ...
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Input/output pins P0, P1, P2, P3 functions
P0.0——P0. 7 : Port P0 is an 8-bit open-drain bidirectional I/O port. When visiting off-chip memory, it is time-shared for a low-8-bit address and an 8-bit bidirectional data bus. When EPROM is programmed, the instruction byte is input by P0, and when the program is verified, it outputs ...
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Schneider Multi9 Series C120 FAQs
1. What are the characteristic curves of Schneider Multi9 series C120L?
A: C/D curve.
2. What is the rated current level of Schneider Multi9 series C120?
A: 63A, 80A, 100A, 125A.
3. Shi ...
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Automatic control instrument construction content and procedures - Schneider
1. Construction preparation. Including the preparation of operating conditions (construction skills documents and detailed planning documents), construction organization planning, equipment list, data budget, and list of machined parts;
2. Cooperate with civil engineering majors to do a good job of embedding, ...
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Features of Schneider explosion-proof inverter box
1. Aluminum alloy shell or steel plate welding, surface spraying;
2. Built-in inverters, circuit breakers, signal lights and other components produced by domestic or Schneider and other companies;
3. It is mainly adjusted by changing its output frequency to adjust the speed of ordinary three-phase asynchronous motor, so as to reach the production process.
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How to choose the Schneider ATV71 and the meaning of the letter
The Schneider inverter model generally reflects the rated voltage, rated power, and load requirements of the inverter (heavy load is still light load type).
Here are 2 examples:
Example 1:
Schneider inverter model: ATV71HD11 ...
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A brief description of the working principle of Schneider power soft starter
Schneider ATS48 soft starter is composed of three opposite parallel thyristors, which are connected in series between the three-phase power supply and the motor, by changing the trigger angle of the thyristor gate pulse, the conduction angle of the thyristor gradually increases from zero, according to the pre-set soft starter parameter curve, the motor output torque ...
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Analysis of common problems of Schneider inverter
1. Use the analog output port to indicate the motor frequency, when the motor frequency is 50Hz, why is the output only 16mA?
Because the maximum output frequency parameter of the inverter is "TFR", the factory default value is 60Hz. So when the inverter output is 50Hz, the analog output is 16mA. At this time, only ...
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Schneider UPS uninterruptible power supply debugging precautions
1. Check whether all switches are in the disconnected position;
2. Check whether there are foreign objects in the UPS uninterruptible power supply cabinet and transformer; Check whether the flat cable connection is correct and whether it is loose;
3. Check that the connected plug is ...
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