Precautions for inverter installation and wiring - LS power generation

1. Active power - in the process of generating and transmitting alternating current energy, the part of energy used to convert into electromagnetic methods is called active power 2. Reactive power - in the process of AC electric energy generation and transmission, it is used for electromagnetic field AC in the circuit.

　　The main functions and functions of PLC: 1. For sequential control: sequential control is based on the current and pre-historical situation of the input switch, and produces the required switching output, so that the system can operate in a certain order. ...

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 ...

The quality of the control circuit determines the function of the LS inverter. The function of the DC central circuit is to smooth the output of the rectifier circuit to ensure that the inverter circuit and the control power supply can obtain a high-quality DC power supply. When the whole ...

With the continuous progress of industrial automation, inverters have also been widely used, energy conservation and environmental protection as the core of China's industrial economy, in the direction of the sustainable development of China's industry, but also useful to promote the sustainable development of China's inverter profession, so that I ...

1. The series and parallel connection application of contactors Many electrical equipment are single-phase loads, so several poles of multi-pole contactors can be used in parallel. Such as resistance furnaces, welding transformers, etc. When using several poles in parallel, a smaller capacity contactor can be used. However, it must be noted that after parallel ...

1. Download the control program. 2. Put the inverter in open-loop experimental mode and set the appropriate parameters. 3. Connect the incoming cable of the inverter. The cable on the output side of the inverter is not connected. 4. Push the high-voltage cabinet to the experimental position, close the switch, and ...

1. Low-voltage electrical appliances: refers to electrical appliances that play the role of on-off, maintenance, control or regulation in circuits with a rated voltage of 1200V and a rated voltage of 1500V and below. 2. Main electrical appliances: electrical appliances used to send control instructions in the automatic control system. 3. Fuse: ...

(1) When the inverter is connected to the power grid of large-capacity power transformer (more than 500kVA), perhaps the same power transformer is connected with a thyristor converter without using a commutation reactor, or when there is a switching capacitor bank for power improvement in the same power grid, an AC reactor or DC reactor should be equipped.

1. For sequential control: sequential control is based on the current and pre-historical conditions of the input switch, and produces the required switching output, so that the system can work in a certain order. This is the basic manipulation of the system. It is also a common manipulation in discrete production processes. ...

1. Circuit wiring (1) The input (R, S, T) and output (U, V, W) of the inverter cannot be connected incorrectly; (2) Wire diameter selection (1) The wiring of the power supply and the inverter and the wire diameter selection method of the motor of the same capacity are the same; (2) The wiring between the inverter and the motor should consider the line electricity.

(1) The core noise is large: it is normal for the electromagnetic system to produce a slight humming sound during operation, if the sound is too loud or abnormal, it can be judged that the electromagnetic system has a problem, and there are three reasons: (1) Poor contact between the armature and the core or tilting of the armature. After repeated collisions between the touch of the armature and the core, ...

1. Look: The normal operation of the motor has a great relationship with the surrounding environment. Therefore, during the daily inspection, check the water leakage and dripping conditions around the motor (which will cause the low insulation of the motor to form breakdown and burn out), and check whether the peripheral of the motor has affected its ventilation and heat dissipation ring.

When using an inverter, a leakage maintainer must not be used. This is a major principle of the use of frequency converters. Some users choose the corresponding leakage maintainer for the inverter when using the inverter. *The result is: the inverter moves together ...

Operating regulations for power inverters 　　Maintenance & Installation Work according to the weight of the product. The number of inverter boxes cannot be stacked in excess of the specified number. Install according to the user manual. Do not open the case during transport. Do not place ...

The differences between voltage type and current type inverter are mainly manifested in: (1) the load of the buffer inverter of reactive power is an asynchronous motor, which is an inductive load, and in addition to transmitting active power between the intermediate DC link and the motor, there is also the exchange of reactive power. Because power electronic switches ...

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 ...

1. The low-voltage fuse cannot be used as an overload maintenance of the motor. 2. The additional voltage of the fuse must be greater than or equal to the operating voltage of the distribution line. 3. The additional current of the fuse must be greater than or equal to the ...

What is the reason why the contactor keeps engaging and disconnecting by pressing the start button after the AC contactor is energized? In my personal opinion, most of the situation is caused by the wrong coil voltage of the replacement AC contactor, or the purchase of ...

How LS Contactor Works: Generally, after the contactor coil is energized, the entire coil current will generate a magnetic field, which will make the core inside have electromagnetic attraction to attract the core, and let their communication contactor point action normally closed contact disconnect, or close, which ...