1. Install AC reactor and DC reactor. When the inverter is used in the distribution transformer capacity is greater than 500kva, and the transformer capacity is greater than 10 times of the inverter capacity, an AC reactor is installed on the input side of the inverter. And when the output voltage of the distribution transformer is unbalanced and uneven in three phases ...

The essence of energy feedback is active inverter, and the energy feedback of the general inverter is completed by the reverse parallel three-phase inverter at the uncontrolled rectification of the pre-stage of the general inverter, and the regenerative energy is fed to the power grid. The main circuit of the energy feedback equipment is mainly composed of thyristors, IGBTs and IPM modules.

Thermal accounting requires information such as power loss, thermal resistance of the package, and ambient temperature. The power loss is the same as the power accounting, which is purely the value of the output input voltage difference multiplied by the input current. The thermal resistance should have a technical standard documented, and if it is not, it is necessary to ask the manufacturer. Basically...

1. The device of the inverter 1.1 The device environment requirements of the inverter Ambient temperature - 10 °C - 40 °C; Ambient humidity: The relative humidity does not exceed 90% (no condensation); Other occasions requiring no direct sunlight, no corrosive gas and flammable gas, less dust, ...

1. Under what circumstances does the leakage maintainer not maintain the electric shock? The leakage switch models commonly used in general families are 1P+N and 2P, as far as the leakage maintainer of 1P+N and the leakage maintainer of 2P (single-phase electricity maintenance) are concerned, when people touch the zero line and the front together, people are touched.

The inverter has many set parameters, each of which has a certain selection range. In the process of use, it is often encountered that the inverter cannot operate normally due to improper parameter settings. Therefore, the relevant parameters must be corrected. ...

Leakage vacuum circuit breaker connection: When normal operation, regardless of whether the three-phase load is balanced or not, the sum of the three-phase current phasor through the main circuit of the zero-sequence current transformer is equal to zero, so there is no induced electromotive force in the secondary winding, and the leakage maintainer operates in a closed state. In the event of leakage or ...

There are many soft problems in inverters, which are also one of the problems that generally exist in the operation of various types of inverters. So how can we reduce the occurrence of soft problems in inverters? This is a problem that all inverter manufacturers and users are very concerned about. More on that below. ...

1 Anatomy of the causes The various causes of the burning of the control loop components of the unmanned station are analyzed and classified as follows: · When the personnel on duty operate, the precautions are not well grasped or the operation is improper; · The organization does not lock and close the operation when it is not stored in energy, and the auxiliary contact of the switch cabinet ...

The reducer is a kind of transmission equipment used for low speed and high torque, which uses the speed converter of the gear to reduce the number of revolutions of the motor (motor) to the required number of revolutions, and obtains a large torque organization. Its main function is to reduce the speed and improve the output torque at the same time, and the torque output share is according to the motor ...

Thermal relay is a maintenance appliance used for overload maintenance of electric motors or other electrical equipment and electrical lines. In the actual operation of the motor, if the machine is in abnormal condition or the circuit is abnormal, the motor will be overloaded, the motor ...

1. Voltage circuit breaker problem The contact is overheated, you can smell the power distribution control cabinet, by checking that the moving contact is not completely inserted into the static contact, and the contact pressure is not enough, resulting in a decrease in the switching capacity, causing the contact to overheat. At this moment, it is necessary to adjust the operating organization so that the moving contact is completely inserted into the static contact ...

1. Classified according to the operating voltage level Low-voltage electrical appliances: electrical appliances used to communicate circuits below 1200V and DC 1500V to play the role of on/off, protection, control or regulation. High-voltage electrical appliances: communication 1200V or more, DC 1500V or more. ...

There are three types of motor inverters ●Ordinary function type. The fundamental V/F frequency conversion speed regulation function, speed regulation accuracy and torque control function requirements are not high for general use can be satisfied. ●High function type. V/F frequency conversion speed regulation with torque control function, hoist constant ...

1. According to the requirements of the device part and the needs of the maintenance function, reasonably select the motor maintainer model and its various maintenance action parameter settings; 2. According to the requirements of the product operation manual, the correct device should be connected correctly according to the use of each terminal, and the operating power supply should be connected to the control ...

With the continuous progress of industrial automation, inverters have also been widely used, energy conservation and environmental protection as the center of China's industrial economic development, in the direction of the sustainable development of China's industry, but also in the effective promotion of the sustainable development of China's inverter profession, so that I ...

In the use of soft starters, some users often have some faulty concepts such as: 1. It is thought that whether the motor can start successfully is related to the function of the soft starter, and a good brand or even a foreign brand should be selected under heavy load. 2. When the motor is not ...

1. Shielded wires should be used for signal lines and control lines, which is beneficial to avoid disturbance. When the line is long, for example the distance jumps 100m, the conductor cross-section should be enlarged. The signal line and the control line should not be placed in the same cable trench or tray with the power line, so as not to disturb each other, it is best to place it through the pipe, ...

Delixi high-precision fully active AC voltage regulator uses linear integrated circuits to form a control system, controls the servo motor, drives the contact voltage regulator to actively regulate the voltage, and is equipped with delay, overvoltage, undervoltage and overcurrent maintenance functions. The product has high efficiency, the same input and output voltage waveforms, and the output ...

1. The structure and working principle of the linear voltage regulator: A commonly used low-voltage communication regulated power supply. It consists of three parts: transformer, inductor, and capacitor divider. 2. Single-phase voltage regulator: Single...

1. What should I do if the indicator light is on and when it is dark Generally, the reason for this situation is that the line contact is poor or the screws of the terminal are not tightened, we should check the condition of the line, connect the power cord and tighten the screws, and press the wire. ...