Zhejiang SHUYI Electric Co., LTD

Zhejiang Shuyi Electric Co., Ltd., the original soft starter; frequency converter is a professional manufacturer and exporter of electrical and electronic products in China. Specializing in research and development, production and sales. Main products: soft starters; frequency converters; automatic transfer switches; AC contactors; switches; relays. Most of the products have passed CCC, CE, VDE, UL, CQC certification. With high-quality products and high-quality services, ZJSHUYI has been exported to Europe, America, the Middle East and other places through our broad market channels and service network. About 100 countries and 78 cities around the world www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarter #functionsmartsoftstarter #ZJSHUYI #intelligentmotorsoftstarter #chinashuyi #shuyitop

Soft start MCC control cabinet MCC (motor control center) control cabinet is the motor control center. 1. The basic structure of the cabinet is composed of C-shaped profiles. The C profile is a steel plate with E=25mm as the module mounting hole. 2. The draw-out MCC cabinet is divided into three compartments, and the compartments are divided into functional unit room (front and left side of the cabinet), busbar room (back of the cabinet), and cable room (right in front of cabinet). Since the horizontal busbar compartment is at the back, it can also be made into a double-sided cabinet. 3.The rear outlet is designed to reduce the arrangement bandwidth of the switch cabinet. The main busbar of the switch cabinet is horizontally installed on the top of the switch cabinet, and the rear half of the cabinet is the cable room. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarter #functi...

Main circuit terminal wiring 1. The three-phase input power is connected to the R, S, and T input terminals of the motor soft starter after passing through the circuit breaker. There is no phase sequence requirement for the three-phase power supply. 2. To control the running and stopping of the motor soft starter, the run and stop keys on the operation panel or an external control loop should be used. 3. The motor soft starter is connected to the bypass electromagnetic contactor, and the phase sequence of the bypass connection is consistent and corresponding. 4. Capacitors and surge absorbers shall not be installed between the output terminals of the soft starter and the motor. 5. The grounding terminal of the motor soft starter must be well grounded. Test run confirmation and parameter setting 1. Confirm that the use environment and input power meet the requirements of product technical performance and design. 2. Confirm that the wiring is correct, especially the input wiring of the p...

1. The soft start cabinet can slow down the impact on the power grid The impact of the large current started by the large motor on the power grid is almost similar to the impact of a three-phase short circuit on the power grid, which often causes power vibration and the power grid loses stability. In addition, the starting current contains a large number of high-order harmonics, which will cause high-frequency resonance with the power grid circuit parameters, resulting in malfunction of the relay protection. Therefore, if the soft start cabinet is involved, the starting current will be greatly reduced. 2. Influence on the motor. The large current produces a great impact on the stator coil and rotor squirrel cage bar of the motor, which will cause the coil to deform and the squirrel cage bar to break. 3. Influence on motor insulation and life. Excessive starting current will increase the power loss on the motor and line. Especially in the case of frequent startup, slow startup, or long ...

A circuit breaker with a rated current of 1A-63A is called MCB, which is a miniature circuit breaker, or micro-break for short. The circuit breaker of 63A-800A is called MCCB, that is, plastic case circuit breaker, referred to as plastic case. The circuit breaker of 800A-6300A is called ACB or type circuit breaker, referred to as frame circuit breaker or intelligent controller switch cabinet. If the current goes up, it is a vacuum circuit breaker, which is a high-voltage circuit breaker. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #softstarters #VFD #ZJSHUYI #breakers #MCB #MCCB #Chinashuyi #shuyitop #ACB

Soft stop can solve the water hammer phenomenon and mechanical impact of water pump caused by sudden stop. In many cases, electrical surges are connected directly to the power system due to their starting characteristics. If it is started directly online, it will generate inrush current up to 6 times the rated current of the motor. This current will overload the power supply system and the switchgear connected in series. If it is started directly, it will also generate a high peak torque. This impact will not only impact the drive motor, but also damage the mechanical devices used. During the starting process of the motor, the #softstarter increases the terminal voltage of the motor according to the preset starting curve to accelerate the motor smoothly, thereby reducing the electrical and mechanical impact on the power grid, the motor itself, and connected equipment when the motor starts. When the motor reaches normal speed, the bypass contactor is turned on. After the motor is start...

Matters needing attention when the inverter is working normally: 1. Check whether the motor has abnormal sound and vibration. 2. Whether the inverter and motor are abnormally heated. 3. Whether the ambient temperature is too high. 4. Whether the load ammeter is the same as usual. 5. Whether the cooling fan of the inverter is running normally. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter #converter #inverters #vfds #vfdmarket #ZJSHUYI #Chinashuyi

The #softstarter has the following 4 major protection functions: 1. Overload protection function: The soft starter introduces a current control loop, so it can track and detect the change of motor current at any time. By increasing the setting of overload current and the inverse time limit control mode, the overload protection function is realized. When the motor is overloaded, the thyristor is turned off and an alarm signal is issued. 2. Phase loss protection function: When working, the soft starter can detect the change of the three-phase line current at any time. Once the current is cut off, it can make a phase loss protection response. 3. Overheat protection function: The temperature of the thyristor radiator is detected by the internal thermal relay of the soft starter. Once the temperature of the radiator exceeds the allowable value, the thyristor is automatically turned off and an alarm signal is issued. 4. Other functions: Through the combination of electronic circuits, variou...

First of all, when selecting an inverter, the power of the motor should be the basic principle. The rated capacity of the inverter is generally marked with KW and current. Under normal circumstances, when selecting an inverter, the corresponding three-phase general-purpose inverter is selected based on the rated KW of the motor. For example: fans, pumps and other equipment. Generally, when selecting a motor of grade 6 or above, it needs to be properly enlarged. The load needs to be controlled by a motor with a reducer, and the power of the inverter needs to be appropriately amplified. For example: cranes, coal mine winches and other equipment. The selection of the inverter should also be based on the load characteristics. If it is applied to frequent startup, the instantaneous current fluctuates greatly, or the load is heavy, the inverter with one or two gears larger can be selected. For example: sand making machine, ball mill and other equipment. When the occasion used for control is ...

In civil building design, low-voltage circuit breakers are mainly used for line overload, short-circuit, over-current, voltage loss, under-voltage, grounding, leakage, automatic switching of dual power sources, and protection and operation of motors during infrequent starting. Principles In addition to complying with basic principles such as the use environment characteristics of low-voltage electrical equipment (see Industrial and Civil Power Distribution Design Manual), the following conditions should be considered: 1) The rated voltage of the circuit breaker should not be less than the rated voltage of the line; 2) The rated current of the circuit breaker and the rated current of the overcurrent release are not less than the calculated current of the line; 3) The rated short-circuit breaking capacity of the circuit breaker is not less than the maximum short-circuit current in the line; 4) The selection of power distribution circuit breakers needs to consider the short-time delay sho...

AC contactor is one of the most commonly used low-voltage control appliances in power drag and automatic control systems. As an executive element, it is used to connect and disconnect lines, or to frequently control the operation of electric motors and other equipment. It is composed of moving and static main contacts, arc extinguishing cover, moving and static iron cores, auxiliary contacts and bracket shells. After the electromagnetic coil is energized, the moving iron core is pulled in under the action of electromagnetic force, and the moving contact is contacted with the static contact directly or through lever transmission, and the circuit is connected. After the electromagnetic coil is powered off, the moving iron core automatically returns under the action of the return spring, commonly known as release, the contacts are separated, and the circuit is disconnected. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #ACcontactor #ZJSHUYI #BypassContactor ...

How to choose a circuit breaker 1. Estimate power distribution Because the selection of circuit breakers needs to be considered according to the use environment, line load and voltage level, etc., you must be careful when purchasing. Usually, the household line will use 16-level hard copper wire, and the indoor circuit breaker will use a 63-amp small circuit breaker, so that when the household circuit fails, the circuit breaker can cut off the power within a specified time to avoid circuit and circuit damage. Electrical damage. 2. Determine the number of power circuits Generally, home improvement circuits are not too complicated, but in order to ensure the power demand of different circuits, the circuits are generally classified, such as lighting as one channel, kitchen sockets as one channel, and air conditioners as one channel, etc. Users need to be based on the actual situation of home decoration. The electricity is classified, and then the appropriate circuit breaker is selected a...

Solid state relays are non-contact switches composed of microelectronic circuits, discrete electronic devices, and power electronic power devices. The isolation device is used to realize the isolation between the control terminal and the load terminal. The input end of the solid state relay uses a tiny control signal to directly drive a large current load. Solid-state relay is a new type of non-contact switching device composed of solid-state electronic components. It uses the switching characteristics of electronic components (such as switching transistors, triacs and other semiconductor devices) to achieve non-contact and non-spark switching. And the purpose of disconnecting the circuit, so it is also called "non-contact switch". Solid state relay is a four-terminal active device, two terminals are input control terminals, and the other two terminals are output controlled terminals. It has both amplifying and driving functions and isolation functions, which is very suitable...

  How to control soft start with buttons 1. First understand the secondary control loop of soft start. Generally, soft start has bypass contactor output node. 2. Know the load start-up time again. The best time to cut the bypass contactor is after the start-up process is completed. 3. The main circuit of the bypass contactor should be connected in parallel with the soft starter. 4. String the output node of the bypass contactor into the control loop of the bypass contactor, preferably a self-locking loop. Among them, the external contactor is used for direct starting, which is in a parallel relationship and requires electrical interlocking. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarter #latestpowerstarter #multifunctionalmotorsoftstarter #softstarterby -passconnector #functionsmartsoftstarter #intelligentmotorsoftstarter #ZJSHUYI #chinashuyi #shuyitop

The difference between the soft start cabinet and the traditional decompression start cabinet is: ①No inrush current. When the soft-start cabinet starts the motor, by gradually increasing the conduction angle of the thyristor, the starting current of the motor increases linearly from zero to a fixed value. There is no impact on the motor, which improves the reliability of power supply, starts smoothly, reduces the impact torque on the load machinery, and prolongs the service life of the machine. ②It has the function of soft stop, that is, smooth deceleration and gradual stop, which can overcome the disadvantages of instantaneous power failure and stop, impact on heavy-duty machinery, avoid the water hammer effect of the elevation water supply system, and reduce equipment damage. ③The starting parameters are adjustable, which can be freely adjusted to the starting current according to the load conditions and the characteristics of the power grid relay protection. www.shuyitop.com; Tel/...

Soft starter is a novel motor control device that integrates motor soft start, soft stop, light load energy saving and various protection functions. The main composition is a three-phase parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor. Different methods can be used to control the conduction angle of the three-phase parallel thyristor, so that the input voltage of the controlled motor changes according to different requirements, and different functions can be realized. The soft starter changes the starting characteristics of the motor by changing the output voltage and boost time. The soft starter uses a three-phase parallel thyristor as a voltage regulator, which is connected between the power supply and the motor stator. Such a circuit is like a three-phase fully-controlled bridge rectifier circuit. When the soft starter is used to start the motor, the output voltage of the thyristor gradually increases, and...

The dual power switch is a switch that automatically switches to another power supply due to a power failure. General dual power switch is widely used in high-rise buildings, residential areas, hospitals, airports, docks, fire protection, metallurgy, chemical industry, textiles and other important places where power failure is not allowed 1. Adopt double-row composite contacts, horizontal connection mechanism, micro-motor pre-storage and micro-electronic control technology to basically achieve zero arcing (without arc extinguishing cover). 2. Adopt reliable mechanical interlocking and electrical interlocking technology. 3. Adopt zero-crossing technology. 4. It has obvious on-off position indication and padlock function, which can reliably realize the isolation between the power supply and the load. It has high reliability and has a service life of more than 8,000 times. 5. Electromechanical integrated design, accurate, flexible and reliable switching conversion, good electromagnetic co...

The inverter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. The inverter is mainly composed of rectification (AC to DC), filtering, inverter (DC to AC), braking unit, drive unit, detection unit and micro-processing unit. The inverter adjusts the voltage and frequency of the output power supply by switching on and off the internal IGBT, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purpose of energy saving and speed regulation. In addition, the inverter has many protection functions. , such as overcurrent, overvoltage, overload protection, etc. Simply put, the inverter converts DC power (battery, storage battery) into AC power (usually 220V, 50Hz sine wave). Because it is usually used to rectify 220 volts of alternating current into direct current, and the role of the inverter is...

Limitswitch as the name implies: an electrical switch used to determine or limit the direction of movement of an object; in elevator control circuits, it is often used to determine the position of the elevator car and door; if the car reaches the designated floor, (usually the car reaches the designated floor) , first contact the buffer limit, the buffer limit feedback signal to the PLC, the PLC sends a command to reduce and buffer the running speed of the car), after the #limitswitch is sensed, it feeds back the signal to the PLC in the control loop, and then the control loop ( PLC) according to the set program, perform actions such as opening the door; from the above point of view, the limit switch is a digital switch that can send 0 and 1, which sends instructions to the PLC, and then the PLC controls the acceleration and deceleration of the car, such as car acceleration and deceleration. , stop; the action of opening and closing the door. Web: www.cnswitch.cn Tel/Fax: 0086-577-6...

  Soft start cabinets are mainly used for various types of high-power motors to achieve smooth start, reduce starting current, reduce the mechanical impact of the large current on the motor when the motor starts and the impact on the power grid, improve the quality of power consumption, save energy, and prolong the use of the motor life. We can also further combine the soft start control cabinet to achieve a variety of composite functions. The soft starter factory Zhejiang Shuyi Electric Co., Ltd. will briefly describe some functional expansion projects of the soft start control cabinet in recent years: First, it can be equipped with a PLC controller. The soft-start control cabinet is equipped with a PLC controller to form a "one-use and one-backup plan", which can realize the automatic detection of the pump at regular intervals, the timing of shutdown, and the regular low-speed and low-pressure (no water) operation. . Second: with a smart ammeter Provide electricity visua...

Selection of overload protection device The overload protection device of the soft start device should choose a thermal overload relay with overload protection, phase failure protection and temperature compensation functions. When selecting, the working current of the motor should be within the range of the setting current of the thermal element. For equipment that is easy to be overloaded during operation, the rated current value of the motor should be close to the lower limit of the setting current range of the thermal element. Selection of bypass contactor At the end of the soft start, the motor has been running at the rated voltage, so the AC contactor can be selected according to the rated current of the motor to meet the requirements. It should be noted that when wiring the cabinet, the soft starter and the contactor should be connected in the same phase, and do not connect the wrong phase sequence. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstar...

When using the inverter, the leakage protector must not be used. This is a major principle for the use of the inverter. Some customers choose the corresponding leakage protector for the inverter when using the inverter. The final result: as soon as the inverter starts, the leakage protector starts, and the system cannot run at all. The principle of the leakage protector is that the zero sequence current is zero. When using the inverter, the zero sequence current cannot be zero. The output side of the inverter is a PWM wave, and there is a capacitive effect of a long cable between the motor cable and the ground. When a cable with a shielding layer is used, the capacitive effect is more obvious. When the inverter is working, the capacitor is charging and discharging, and the current flows into the ground through the capacitor, and then flows back to the inverter from the ground wire on the incoming side to form a current loop. If an earth leakage protector is used on the incoming side, ...

Soft starter is actually a motor control device with motor #softstart , soft stop, light load energy saving and various protection functions. It is mainly a three-phase parallel thyristor and its electronic control circuit connected in series between the power supply and the controlled motor. By controlling the conduction angle of the three-phase parallel thyristor, the input voltage of the controlled motor can be changed according to different requirements, and various functions can be realized. The #inverter is mainly used where speed regulation is required. Its output not only changes the voltage but also changes the frequency at the same time; the soft starter is actually a voltage regulator. When the motor is started, the output only changes the voltage and does not change the frequency. The frequency converter manufacturer emphasizes that the frequency converter has all the functions of the soft starter, but its price is more expensive than that of the soft starter, and the stru...