1. Use the analog output port to indicate the motor frequency, when the motor frequency is 50Hz, why is the output only 16mA?
Due to the maximum output frequency parameter of the inverter "TFR", the factory default value is 60Hz. So when the inverter output is 50Hz, the analog output is 16mA. In this case, just change the "TFR" parameter to 50Hz
2. Why is the inverter used for fan and pump loads to save energy?
According to the basic law of fluid mechanics, it can be known that the fan pump load is a typical square rotation load, and its main characteristics are: the rotation 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 fan pump load is mostly selected according to the amount of full load operation, and most of the time in practical application is not in full load condition, so as long as the average speed decreases a little, 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 shield, the valve is commonly used to adjust the air volume or the flow rate, so not only the waste of power is formed, but also the vibration and water hammer phenomenon of the power grid impact and the equipment are formed due to the excessive starting current, when the frequency converter speed regulation is selected, 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 easily complete closed-loop constant voltage control, and the energy-saving efficiency will be further improved. The use of inverter avoids the impact on the power grid when starting, reduces the equipment failure rate, eliminates the vibration and water hammer phenomenon, prolongs the service life of the equipment, and also reduces the capacity requirements and reactive power loss of the power grid.
3. What is the basic configuration of the three-phase 380V power supply ATV71/61 inverter specification product?
Chinese LCD screen: 15KW below is optional, 15KW or more is standard. DC incoming reactor: 0.75kw-15kw without built-in DC reactor, selected as an accessory when needed; The DC reactor of the standard product of more than 90KW is delivered with the inverter, and the user needs to assemble according to the device drawing, if the DC reactor is not ordered, add a "D" at the end of the type; 18.5KW-75KW has been built-in. EMC input filters: All have built-in EMC.
4. How to complete the control of ATV38 and ATV58 through the operation panel?
First, in the control menu, set "LCC" to "YES" (panel operation); Enter the "LFR" parameter in the adjustment menu, press the up and down keys to adjust the given value, and complete the control of the inverter.
5. How to communicate between multiple ATV71/61 inverters connected to the same bus and a graphical display terminal? The [Communication] menu→ [Network MODBUS] → [MODBUS Address] (ADD) set the address of each inverter. When multiple inverters are connected to the same display terminal, the terminal will actively display the inverter address. In multipoint mode, it is possible to access all menus, but does not allow the graphical display of the terminal to control the inverter.
6. In the application of motor reactors, why is the interval required for shielded cables shorter than those for unshielded cables?
Due to the parasitic capacitance generated between the shield and the conductor of the shielded cable, the cable should not be too long.
7. The main circuit of the high-power ATV71/61 inverter has been energized, why does NLP (main circuit not energized) sometimes prompt?
It is because there is no short wire between the terminals PO and PA/+ connected to the DC reactor, and the main circuit cannot be supplied with power. The short-wired of the frequency conversion less than 90KW has been connected when leaving the factory, and the frequency conversion required by the customer is short-circuited by the customer when the frequency conversion is greater than or equal to 90KW.
8. What is the function of the inverter DC reactor?
Reduce the higher harmonic disturbance of the input current and improve the power factor of the input power supply.
9. What is the significance of mandatory local operation of the inverter?
Local operation refers to the control of the terminal or display module by the inverter, and the corresponding communication control. If you want to switch between communication control and local operation, you must configure a logical input terminal as "FLO", that is, force local operation. When the input is condition 1, the local operation is forced; When the input is condition 0, the communication control is effective.
|
More on that
|
Schneider servo drive fault code
1. AL001: overcurrent, the current value of the main 2113 circuit exceeds the motor instantaneous 5261*** high current value 1.5 times when the action is 4102.
2. AL002: overvoltage, the voltage value of the main return 1653 channel is higher than the standard value.
3. AL003: low voltage, the voltage value of the main circuit is lower than the standard.
|
|
Schneider miniature circuit breaker C type D type difference
The difference between Schneider OSMC32N3D10 and OSMC32N3C10
After type comparison, one is Schneider D10A and the other is Schneider C10A.
Schneider circuit breaker type D, suitable for power equipment, such as motor load, air conditioner, etc.;
Schneider circuit breaker type C, suitable ...
|
|
Schneider servo model introduction
LXM23DU01M3X servo drive 0.1 kW
LXM23DU02M3X servo drive 0.2 kW
LXM23DU04M3X Servo drive 0.4 kW
LXM23DU07M3X Servo drive 0.75 kW
LXM23DU10M3X ...
|
|
Schneider instrumentation maintenance precautions
1. When assembling and adjusting the appearance, the original position should be recorded for rehabilitation.
2. When repairing the appearance of precision instruments, if you accidentally bounce small parts away, you should first determine the position where you can fly down.
|
|
Schneider Thermal Relay Model Meaning
The function of the thermal relay is mainly used to carry out overload maintenance on the asynchronous motor, and his operating principle is that after the overload current passes through the thermal element, the bimetal sheet is heated and twisted to advance the action organization to drive the contact action, so as to disconnect the motor control circuit to realize the motor power-off thermal relay ...
|
|
Diode selection and substitution method - Schneider
1. Selection of detection diode
Point-contact germanium diodes are generally used for detection diodes, such as 2AP series. When selecting, the detection diode with high operating frequency, small reverse current and large forward current should be selected according to the specific requirements of the circuit. Despite the ...
|
|
Schneider Category VI unshielded RJ45 information module
Product Introduction
compose
1. RJ45 module body, 8 IDC contact pins
2. Crimping module
3. Back cover 7751S (optional)
Operating temperature range
-40°C to +70°C (65°C for non-stop use)
...
|
|
Schneider Instrumentation Classification Standard
The classification specifications for the appearance of the instrument are as follows:
The appearance of the instrument is a comprehensive product of a variety of science and technology, with a wide variety of varieties, wide application, and constantly updated, and a variety of classification methods. According to the purpose and use of the use of the main measuring instrument, car appearance, tractor appearance, marine ...
|
|
Inverter braking resistor selection – Schneider
In the process of fast parking, because of the inertia, a lot of regenerative electric energy will occur, which will directly act on the intermediate DC part of the inverter, and if this part of the electric energy is not consumed, the inverter will be faulty or the inverter will be damaged. The braking resistor is used to dissipate this part of the electrical energy. ...
|
|
Precautions for false load connection in Schneider inverter debugging
There are many novices who are not familiar with the fake load when repairing the inverter, and the repair of the inverter saves many of their modules with the false load, because the novice repairer generally does not know how to do this, and now the light is on to make it clear that the module is going to be broken. A false load is a resistor with a few hundred ohms ( ...
|
|
Schneider Electric miniature circuit breaker accident prevention
With the development of the electric power industry, now the electricity has been accompanied by every detail of our days, so the maintenance of the electric power industry, began to get more and more attention from everyone, because the circuit in the daily operation side, very simple because of overvoltage or undervoltage and present a certain problem, which ...
|
|
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.
|
|
Is there a restriction on the installation direction when Schneider installs the inverter?
It should be basically stored in the plate, the problem is that the plate with a fully enclosed structure is large in size, takes up a lot of space, and the cost is higher. This can be done by:
(1) The planning of the disc should be based on the heat dissipation required by the actual device;
(2) Profit ...
|
|
Schneider inverter motor control mode
Fundamentals of magnetic flux vector manipulation
The control of a three-phase asynchronous motor is much more complicated than that of a DC motor because the current, voltage, induced potential, magnetic flux, etc., of the stator and rotor are all alternating.
However, the stator winding of the three-phase asynchronous motor is a symmetrical three-phase winding, which exerts a ...
|
|
Schneider PLC signal light meaning
Take the Schneider PLC with model number TWDLCAA40DRF as an example:
The first PWR: is the meaning of power supply;
The second RUN: is the PLC operation indicator; Long dark: The application is not fulfilling; Shine: The controller is in a stay or a mistake in performance; Solid on: The controller is in operation ...
|
|
Schneider servo motor advantages
Schneider servo motor is one of the brands of servo motor, the performance is relatively good, is a brand made in Germany, in China ** degree is relatively high. Servo motor refers to the servo system, (servomechanism) in which the mechanical components are controlled.
|
|
The type of signal output from the Schneider sensor
The type of sensor output signal
Sensors are commonly used detection devices that convert perceived information into electrical signal outputs, and are used in a variety of applications. What can be divided into the output signal mode of the sensor ...
|
|
Schneider molded case circuit breakers NSX, CVS, EZD differences
1. NSX series is Schneider's high-end molded case circuit breaker, with the best performance in all aspects, and of course, the price is also the most expensive.
2. CVS series, which is the main series of Schneider, has the second best performance compared with the NSX series, but can meet the vast majority of applications, and the price is more affordable.
3 ...
|
|
The role of Schneider thermal relays
The effect of the thermal relay is mainly used to carry out overload maintenance on the asynchronous motor, his operating principle is that after the overload current passes through the thermal element, the bimetal sheet is heated and bent to advance the action mechanism to drive the contact action, so as to disconnect the motor control circuit to complete the motor power-off thermal relay ...
|
|
Advantages of Schneider molded case circuit breaker
The contact orientation is 100% secure
As for the circuit breaker, the indication of the handle can also be said to be the fault indicator of the circuit breaker, if it is "blurred" for a while, it may cause irreparable damage. Therefore, according to the requirements of the national standard, in any case, the hand of the circuit breaker ...
|
|
Contact
working hours
