The role of LS electric contactors

Rated current of LS molded case circuit breaker: 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 high may reach 630A. ...

1. Method 1 Method 1: Fourier transform to obtain the amplitude and phase of each harmonic of voltage and current, calculate the active power of each harmonic according to P=√3UIcosφ, and add the active power of all harmonics to obtain the harmonic power. Method 2: Measure the total active work ...

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...

Through the rational planning of the structure of the low-speed centrifuge, the hygienic dead angle can be effectively eliminated. The transition of the structural parts is smooth, and the surface is polished. External structural components, fasteners, and rollers are made of stainless steel. The housing is a clamshell type, which allows for thorough cleaning of the interlayer space of the centrifuge housing without the need for a bowl ...

With the deepening of factory automation, the high efficiency and low cost of active warehouses, elevators, transfer systems, etc., as well as the high speed, high efficiency and high precision of small CNC machine tools, kneading and forming machines, textile and film machinery, etc.

Motion control has a significant period characteristic, it is a combination of a variety of high-tech to push industrial automation, office automation and home automation to a higher stage. At present, the motion control is mainly composed of three parts: inverter, motor and controller. ...

The overvoltage of the inverter is manifested in the tributary voltage of the DC bus. Under normal conditions, the direct current of the inverter is the average value of the three-phase full-wave rectification. If calculated by 380V line voltage, the average DC voltage Ud=1.35U line=513V.

The Electronic Motor Relay (EMPR) is a digital motor maintenance relay with an MCU that has a compact and compact form factor that can be combined directly with a contactor. Through the implementation of real-time data processing, high reliability and high precision can be completed, and it can pass through phase loss, reverse, unbalance, stalled rotor, connection...

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.

Driver: Under the premise of carrying out frequency conversion skills, the servo drive has carried out more advanced control skills and algorithm operations than general frequency conversion in the current ring, speed ring and azimuth ring inside the drive (the frequency converter does not have this ring), and it is much stronger than the traditional servo in terms of function.

The inverter is usually divided into 4 parts: the rectifier unit, the high-capacity capacitor, the inverter and the controller. Rectifier unit: converts alternating current with a fixed operating frequency into direct current. High Capacitance: Stores converted electrical energy. ...

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.

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. 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.

In fact, there are also options for automatic gain adjustment, which generally divide the control response into several levels, such as high echo, medium echo, and low echo, which can be set by the user according to actual needs. Azimuth Share Buff: 1. Set the share gain of the azimuth ring adjuster; 2 ...

Frequency conversion motor refers to the motor that runs continuously with 100% rated load in the range of 10%-100% rated speed under standardized environmental conditions, and the temperature rise will not exceed the allowable value of motor calibration. Communication contactors are not necessary for frequency converters and are built in, ...

The quality of a thing is relatively speaking, the inverter as a power supply used to drive the motor to run, its function is to regulate the speed, under the premise of normal wiring, reasonable parameters, and no fault with the load, if the speed of the motor can be controlled according to the requirements, the shaking error is less than the equipment ...

1. The working temperature of the inverter is high 1. Check whether the ambient temperature of the inverter is too high; 2. Check whether the cooling fan inside the device is working normally; 3. Check whether the ventilation pores and mask grilles are blocked; 4. Check if the load is too heavy. ...

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 fatal problems in terminal blocks: ...

"Servo" - the word derives from the Greece word for "slave". People want to treat the "servo mechanism" as a handy tame thing, and act in accordance with the requirements of the control signal. The rotor stands still until the signal comes; As soon as the signal arrives, the rotor rolls; When the signal disappears, the rotor can instantly ...