1. When the power supply is now powered or the inverter is in running condition, do not open the shell of the inverter. Otherwise, an electric shock may occur.
2. When the front cover of the inverter is opened, do not move the inverter. Otherwise, you may be shocked by the high-voltage terminals or exposed charging capacitors.
3. In addition to regular checking or wiring, do not open the shell of the inverter, even if the inverter is not connected to the input power supply. Otherwise, you may be shocked by approaching the charging circuit.
4. Wiring and regular inspection should be operated after removing the input power supply and using the instrument to discharge the DC side voltage (lower than DC 30V) for at least 10 minutes. Otherwise, you may be electrocuted.
5. Start the switch with a dry hand. Otherwise, you may be electrocuted.
6. Do not use cables with damaged insulation. Otherwise, you may be electrocuted.
7. Do not make the cable scratched, squeezed, overvoltage and overloaded. Otherwise, you may be electrocuted.
8. The inverter should be installed on a non-flammable surface, and no flammable materials should be placed nearby. Otherwise, there may be a fire.
9. If the inverter is damaged, disconnect the input power immediately. Otherwise, you may suffer physical damage.
10. Do not energize the inverter that is damaged or has few parts, even if the installation is now complete. Otherwise, you might have an electric shock.
11. Linen, paper scraps, wood chips, dust, metal fragments or other sundries are not allowed to enter the inverter. Otherwise, there may be a fire or accident.
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LS power circuit breaker wiring method
The wiring method of the circuit breaker has the front of the board, the back of the board, the plug-in type, the drawer type, if the user has no special requirements, they are supplied according to the front of the board, and the wiring before the board is a common wiring method.
1. Wiring method behind the board: The wiring feature behind the board is that the circuit breaker can be replaced or repaired, without wiring from the beginning.
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Application of servo motor - LS power generation
Quick to use:
There are three cables necessary for the operation of the motor: power cable; Motor power line, motor encoder line.
Control line interface X5:
Servo enable necessary pin C24V power supply (7,41) Servo enable SR ...
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Several basic functions of the inverter - LS generates electricity
The inverter mainly has the following functions:
1. Soft up
The direct launch of the inverter motor will have a severe impact on the power grid, and it will also have too high requirements for the capacity of the power grid, which is extremely unfavorable to the service life of equipment and power grid circuits.
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Inverter external potentiometer connection method - LS power generation
The two wires are connected to the resistor, and the other wire is connected to the adjustment terminal.
The red thread is attached to the blackhead and inserted in a small hole.
Connect both ends of the IR potentiometer to +10V and ACM, and slide the termination to the voltage input terminal AVI.
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The choice of inverter power - LS produces electricity
1. The power value of the inverter is the most suitable for the power value of the motor, so as to facilitate the operation of the inverter at a high power value.
2. When the power classification of the inverter is not the same as the power classification of the motor, the power of the inverter should be as much as possible.
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Advantages and disadvantages of LS inverter non-sensing vector control
The first generation of LS inverter selects the voltage frequency ratio scalar control method, which carries out frequency conversion speed regulation according to the linear ratio determined by the equivalent circuit of the asynchronous motor. Voltage refers to the effective value of the fundamental wave, and changing U/f can only regulate the steady-state magnetic flux and torque of the motor, not to mention dynamic control. In order to improve the low ...
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LS MASTER-K120S series PLC features and advantages
(1) This series is divided into two types: economic type and standard type, which can meet the requirements of different customers:
Economical: 10/14/20/30 points (10/14 points with 2 built-in analog potentiometers), up to 70 points.
Standard type: 20/30/40/60 point DR/DRT (2-axis position ...
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The function and function of the inverter VFD - LS produces electricity
1. Energy saving
The energy-saving effect of VFD is mainly manifested in the application of fans and water pumps. After the fan and pump load is selected for frequency conversion speed regulation, the power saving rate is 20% - 60%, because the actual power consumption of the fan and pump load is basically proportional to the cubic speed. When users ask for an average ...
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The application of the inverter to supply power to the motor has encountered a problem
A frequency converter is a device that converts power to other frequencies of power supply. The power frequency of our country is 50Hz, in the field of motors, in order to change the speed of the motor, or other performance changes, many motors choose inverter power supply.
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Precautions for the maintenance of the inverter of the tensile testing machine - LS generates electricity
In the course of regularly checking the variable-frequency drive (VFD) of the tensile testing machine, we can visually check the operating status directly from the outside.
(1) The ambient temperature is normal, and it is required to be between -10°C and +40 ...
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Fault analysis of the main circuit of the inverter - LS power generation
According to the statistical analysis of the frequency and shutdown time of the inverter's detailed common problems, the correction rate of the main power supply circuit accounts for more than 60%; The main operating parameters are not set properly, resulting in about 20% of common problems; Common problems with control circuit boards account for 15%; 5% of common problems are caused by incorrect operation and external anomalies ...
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Introduction of LS AC motors
1. AC synchronous motor: that is, the rotor is composed of permanent magnet data, so after rolling, with the change of the stator rotation magnetic field of the motor, the rotor also changes the speed of the response frequency, and the rotor speed = stator speed, so it is called "synchronization".
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Interference phenomenon of LS power inverter
1. As soon as the inverter of the heat exchange station is opened, the pressure transmitter jumps randomly;
2. In the water supply controlled by the inverter, the pressure transformer is used as a signal to collect the pressure, and the pressure transformer is disturbed by the inverter;
3. When the inverter starts the motor, the voltage converter signal is unstable and beats violently;
4. Pressure transformer (4-20 ...
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The basic problem of LS electric molded case circuit breaker
Rated current of LS molded case circuit breaker:
Now in the process of using molded case circuit breakers, it is necessary to understand the rated current of molded case circuit breakers, and the rated current of molded case circuit breakers generally has more than a dozen, mainly 16A, 25 A, 30A, and the high may reach 630A.
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Inverter fault diagnosis - LS power generation
1. How to distinguish between heavy and light faults
When there is a problem with the light, the system announces the alarm signal and the fault indicator flashes. When there is a serious problem, the system will announce the problem indicator, the problem indicator will always be on, together announce the order to break the high voltage and stop closing, and store the problem ...
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Fatal failure of LS power terminal block
From the point of view of application, the function that should be reached is: it is necessary to conduct the local area where the touch part should be conducted, and the touch is reliable. If the insulating part should not be conducted, it is necessary to insulate it firmly. There are three common fatal problems in terminal blocks:
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LS inverter frequency conversion mode
1. The operator panel is given The operator panel is a simple frequency setting method of the inverter, and the user can directly change the set rate of the inverter through the potentiometer, digital key or rising and descending keys on the inverter operator panel. The big advantage of the operator panel is that it is simple ...
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Brake unit, brake resistor function - LS generates electricity
Brake unit:
The function of the braking unit is to turn on the energy-dissipating circuit when the voltage Ud of the DC circuit exceeds the specified limit (such as 660V or 710V), so that the DC circuit can release energy by thermal energy after passing through the braking resistor. The braking unit can be divided into built-in and external, the former is ...
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Switching analysis and synchronous control of inverter - LS power generation
AC asynchronous motors are widely used in all walks of life, and frequency converters and power frequency power supplies are often required to switch in the selection of frequency conversion speed control system. The primary types of switching are: fault switching and multi-machine system switching. In the process of operation of many production machinery, the motor is not allowed to stop ...
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Principle of electrical equipment maintenance - LS power generation
1. Speak before you start
When it comes to faulty electrical equipment, you should not rush into action, but ask about the passage and phenomenon of the fault.
For unfamiliar equipment, you should also understand the circuit principle and structural characteristics, and follow the corresponding rules. Before dismantling, it is necessary to fully understand each ...
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