LS produces common sense of electroplastic case circuit breaker

Although many relays, timers and counters are often used in the ladder diagram programs used by LS PLC, LS PLC does not have these hardware physically, but uses memory and program programming methods to make logic control modifications, and connects external machines through output components.

When LS PLC is put into operation, its operation process is generally divided into three stages, namely input sampling, user program fulfillment and output rewriting. The completion of these three phases is called a scan cycle. Throughout the operation, the PLC's CPU repeatedly performs the performance at a certain scanning speed on ...

Because the application method is incorrect or the setting environment is unreasonable, the inverter will simply malfunction and cause problems, or the expected operation effect will not be satisfied. In order to prevent problems before they occur, it is important to carefully analyze the cause of the problem in advance. ...

1. When the power supply is now powered or the inverter is in operation, 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 run the inverter. Otherwise, you may be subjected to ...

I/O Points: When discussing control systems, I/O points are a term that is often heard. It refers to the input/output point, I stands for INPUT, which refers to the input, and O stands for OUTPUT, which refers to the output. The inputs/outputs are for the control system, and the input refers to the ...

1. Auxiliary contact: the contact mechanically linked with the main circuit of the circuit breaker and the closing mechanism is mainly used for the display of the circuit breaker and the closing status, and is connected to the control circuit of the circuit breaker through the opening and closing of the circuit breaker to control or interlock its related electrical appliances. For example, output to signal lights, relays, etc.

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 height may reach 630A. L ...

LS inverter, the full name of LS AC inverter governor, converts direct current into alternating current by providing a variety of use configurations, and controls the speed of the motor by changing the voltage and frequency of the general power input to meet different industrial needs, so as to complete the energy saving and environmental protection of the automation system. ...

First, the frequency conversion skill is only one of the many power-saving skills, including voltage regulation and current limiting, power factor compensation, phased power regulation, frequency conversion, chopping, filtering, energy feedback and other skills, even if the power saver using the principle of frequency conversion is concerned, the frequency converter is only power-saving.

A transistor is a solid-state semiconductor device with a variety of functions such as detection, rectification, amplification, switching, voltage regulation, and signal modulation. A transistor is a variable current switch that can manipulate the output current based on the input voltage. Unlike general mechanical switches (e.g. Relay, swit...)

Inverter control method: low-voltage general frequency conversion output voltage is 380-650V, output power is 0.75-400kW, operating frequency is 0-400Hz, and its main circuit adopts AC-DC-AC circuit. Its control methods have gone through the following five generations. 1U/f=C sine pulse width modulation ...

1. Poor touch The metal conductor inside the terminal block is the core part of the terminal, which transmits the voltage, current or signal from the external wire or cable to the touch piece corresponding to the connector it matches. Therefore, it is necessary for the touch parts to have excellent structure, stable and reliable touch firmness.

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 types of faults in terminal blocks: ...

1. It is used for switching control The ability of PLC to manipulate switching quantities is very strong. The number of points in and out of the control, less than a dozen points, dozens of points, more can be hundreds, thousands, or even tens of thousands of points, because it can be networked, the number of points is almost unlimited, no matter how many points can be controlled, the control ...

The communication control of the inverter is more complicated, so it is listed separately. The communication control of the inverter is a control method for the operation, speed regulation and status indication of the inverter through the communication interface of the inverter. ...

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.

To discuss the disturbance problem of LS inverter, we must first understand the operating principle of inverter, from the structural point of view, inverter is divided into direct inverter and direct inverter. The direct inverter is a communication that directly converts the I frequency current into a controllable frequency, and there is no intermediate DC link. Each phase of it ...

Alternating current can be converted into direct current using rectifier electricity, but in three-phase electricity, this DC voltage or current contains voltage or current ripple with a frequency of six times the frequency of the power supply. In addition, the inverter inverter will also generate ripple voltage or current due to output and carrier frequency, etc., and reverse ...

When LS PLC is put into operation, its operation process is generally divided into three stages: input sampling, user program fulfillment and output rewriting. The completion of these three phases is called a scan cycle. During the entire operation, the PLC's CPU repeatedly performs the ...