How to choose LS contactors

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.

1. The motor cannot roll after being energized, but there is no abnormal noise, no peculiar smell and smoke. 1. Cause of the problem: (1) The power supply is not connected (at least two phases are not connected); (2) Fuse blowing (at least two-phase blowing); (3) The overcurrent relay is adjusted too small; (4) The wiring of the control equipment is faulty. 2. Question ...

1. Harmonic disturbance The rectifier circuit will produce harmonic current, which produces a voltage drop on the impedance of the power supply system, resulting in distortion of the voltage wave pattern, and the voltage of this distortion constitutes a disturbance on many appearances, and the common voltage distortion is the flattening of the top of the sine wave. Harmonic wave...

The rectifier part of the general inverter selects the diode uncontrollable bridge rectifier circuit, and the middle filter part selects the large capacitor as the filter, so the input current of the rectifier is actually the charging current of the capacitor, and the harmonic component is relatively steep and steep.

According to the requirements of safe, high-quality, reliable and economical operation of the production, transforming, transportation, distribution and use of electric energy in power plants and substations, the following electrical equipment is mainly included. 1. Primary equipment Directly involved in production, ...

1. The touch screen is controlled by PLC inverter 1. At present, the general control of the inverter needs to use PLC to communicate with the inverter, read the information of the inverter, and then the touch screen communicates with the PLC in order to complete the control of the inverter to start, stop, and monitor the operation of the inverter.

(1) Excessive voltage error will increase the loss of electrical equipment, shorten the life, and work abnormally, which will damage the stability of the synchronous operation of the power system, the stability of the voltage and the economic operation of the power grid, and will cause the inverter system to report overvoltage fault or undervoltage fault. ...

The PLC should be kept away from strong disturbance sources such as electric welding machines, high-power silicon rectifier equipment and large-scale power equipment, and cannot be installed in the same switch cabinet as high-voltage electrical appliances. Power line, control line and PLC power line and I/O line should be separated from the wiring, barrier transformer and PLC and I/O should be selected ...

Metasol series MS (100A and below) products are newly launched and the primary product specifications: contactors, thermal relays, and center relays. Features: The body is small, the internal structure is sealed, and the safety factor is high ...

1. The coil voltage of the contactor should generally be lower, so that the insulation requirements of the contactor can be reduced, and it is safer to use. However, in order to facilitate and reduce the equipment, it is often selected according to the actual grid voltage. 2. The operating frequency of the motor is not high, such as compressor, water pump, air ...

Universal inverters are characterized by their versatility. With the development of inverter technology and the continuous expansion of market demand, general-purpose inverters are also developing in two directions: low-cost simple general-purpose LS inverters and high-performance and multi-functional general-purpose inverters. They have the following characteristics: ...

LS is an electrical equipment company affiliated to LG, kglwin3.62 programming software Chinese version is a professional plc programming software designed to help daily more efficient planning and development software, the software supports the programming and debugging of LG Master-K series and LG MASTER-K series, and provides ...

There are many categories of PLC, and the following is a brief introduction to PLC and its main functions 　　As an innovative PLC product family that combines the technical capabilities of power production and production, XGT is a system based on open networks, ultra-high-speed processing speeds, compact size and a large number of improved software.

1. Maintain the inverter from the damage of regenerative electricity In the process of rapid shutdown of the motor, because of the inertia, a lot of regenerative electric energy will be generated, if this part of the regenerative electric energy is not consumed in time, it will directly act on the DC circuit part of the inverter.

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.

An important difference between servo and frequency conversion is that frequency conversion can be without encoder, while servo must have an encoder for electronic commutation. 1. What the two have in common: The AC servo technology itself is to learn and apply the technology of frequency conversion, and the servo control of the DC motor is based on the ...

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 ...

Whether the welding skills of the inverter repair personnel are excellent is directly related to the quality and results after repair. If the welding quality is not up to standard during repair, the pins of the components will be broken when the components are disassembled, the printed circuits on the PCB will be damaged, the components will not be soldered firmly when the components are installed, and the two components ...

1. Soft start function The soft start function of the inverter is no longer necessary to talk about today, and twenty years ago, it was still a very exciting operation, which is also one of the auxiliary basic functions of the inverter. At the beginning of the birth of the inverter, it was aimed at the most widely used three-phase asynchronous squirrel cage ...

1. Confirm the location of the device Before the equipment switches on and off the power supply, it is necessary to confirm the location of the equipment, and generally require the equipment to be in a ventilated, boring, non-corrosive gas and dust-free place. 2. Equipment holder The fixed base of the switching power supply is fixed on the orientation of the equipment, and the general ...