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. ...

Although many names such as 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 to do logic control and editing, and connects to external machines through output components.

One. Logical stage　　 The so-called logical stage is to be able to complete the general logical planning in the relay system, since it is a relay system, so the knowledge of power drag is the foundation of this stage. I personally summarize that the root of learning the relay system lies in the word "grab", the relay system ...

LS contactors are divided into AC contactors (voltage AC) and DC contactors (voltage DC), which are used in electricity, power distribution and consumption. Contactor in a broad sense refers to the electrical appliances that use the current flowing through the coil to generate a magnetic field and close the contact to control the load in industrial electricity. ...

1. The transformer is grounded twice It refers to the grounding of the S2 terminal of the current transformer or the ground of the n terminal of the voltage transformer. As long as the single point is grounded, because the transformer is blocked between the second and the first, before grounding, the secondary winding has no potential connection with the ground, after grounding, the transformer ...

1. Trapezoidal stairs start from the horizontal line and end up with a vertical line (generally you can omit not to draw, only draw the left busbar). On the left side of each row is the junction combination, indicating the conditions that drive the logic coil, while the logic coil indicating the effect can only be connected to the bus on the right. The contact can not appear in the coil right ...

1. The influence of electromagnetic disturbance on the inverter: In the modern industrial control system, the microcomputer or PLC control technology is mostly selected, and in the process of system planning or transformation, it is necessary to pay attention to the disturbance of the inverter to the microcomputer control board. The inverter is disturbed by the outside world, because the user ...

1. No-load energizing test of inverter 1. Ground the grounding terminal of the inverter. 2. Connect the power input terminal of the inverter to the power supply through the leakage maintenance switch. 3. Check whether the factory display window of the inverter is normal, if it is incorrect, it should be reset.

The XGT series is a creative PLC product family that combines LS's power generation technology capabilities to provide next-generation solutions based on open networks, ultra-high-speed processing speeds, compact scales, and greatly improved software for the engineering environment. XGT series for a variety of ...

The contactor is mainly composed of a drive system, a contact system, an arc extinguishing system and other parts. 1. Drive system: The drive system includes electronic modules, soft iron, and permanent magnets, which is an important part of the permanent magnet contactor.

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 ...

1. Energy consumption type This method is to connect a braking resistor in parallel in the DC circuit of the inverter, and control the on/off of a power tube by detecting the DC bus voltage. When the DC bus voltage rises to about 700V, the power tube is turned on, and the regenerative energy is passed into the resistor.

Features of SUSOL series circuit breakers: It can be used as the main switch of electrical equipment, and the limit breaking ability is high, Icu=Ics Modular construction of circuit breakers: Tripper replacement (TS series) can be combined in a variety of combinations, such as ...

Rated current of LS molded case circuit breaker: Now in the process of using the molded case circuit breaker, it is necessary to understand the rated current of the molded case circuit breaker, and the rated current of the molded case circuit breaker is generally more than a dozen, mainly 16A...

Contrary to the rectifier, the inverter converts the DC power into the communication power of the required frequency, and the 3-phase communication output can be obtained by turning on and off the 6 switching devices at the confirmed time. Take a voltage-type PWM inverter as an example to show the switching time and voltage waveform. Control circuit ...

K120S series PLC product is a unit PLC product introduced to the market by LS in 2004, which has laid a solid foundation in the low-end small machinery supporting industry with its high-performance price ratio. Relying on some special functions of the product, it has also won some industry praise. ...

In fact, the problems of the motor are not the cause of the motor itself, most of them are caused by the non-standard debugging of the inverter or the wrong inverter motor when the inverter motor is used, etc., mainly due to the following situations: 1. Put the general motor ...

LS Denden's low-voltage inverters provide optimal speed control in a variety of industrial sites, and are solutions that can demonstrate the completion of an automation system and have an epoch-making power saving effect. It includes four types of products: IGXA; S100; IS7; C100 series. ...

The contactor is an automatic switch in industrial electricity that uses a button to control its on/off. The contactor consists of an electromagnetic coil, a static armature, a moving armature, a static contact, a moving contact and a fixing bracket. The principle is that when the electromagnetic coil of the contactor is connected to the communication electricity, a strong magnetic field will be generated to make the center of the coil ...

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 ...

First, the power supply problem 1. The power supply voltage is too high When the power supply voltage is too high, the motor back electromotive force, magnetic flux and magnetic flux density all increase. Since the magnitude of the iron loss is proportional to the square of the magnetic flux density, the iron loss increases, resulting in overheating of the core. And the increase in magnetic flux causes ...