Zhejiang SHUYI Electric Co., LTD

1. The installation and maintenance of the soft starter should be carried out by qualified professionals. 2. It is strictly forbidden to use high-voltage test equipment (such as a megger) to test the insulation of the soft starter. 4. If the motor is required to run reversibly, a reversing contactor can be installed on the incoming side, but be careful not to install it on the output side of the soft starter. 5. After the rotor of the Rao linear motor is connected in series with an appropriate starter resistance to increase the starting torque, the soft starter can also be used to start the Rao linear motor. When the motor reaches full speed and is stable, the starting resistance should be bypassed to reduce Small power loss. 5. It is strictly forbidden to put the power factor compensation capacitor on the output side of the soft starter, and the capacitor cannot be switched during starting. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motor

(1) If the two power sources are installed in the same place and share the same low-voltage power distribution cabinet, a four-pole switch shall be used for the incoming circuit or the switching circuit of the dual power sources. (2) The dual-circuit distribution transformers serve as backup power sources for each other, or the transformers and diesel generators serve as backup power sources for each other, and the neutral points of the transformers and generators are directly grounded nearby. If two sets of power supplies share a low-voltage power distribution cabinet, the incoming circuit should use a four-pole switch (3) If the two sets of power supplies are in the same room (common ground), but do not share low-voltage power distribution cabinets, the power transfer switch in the secondary power distribution equipment can be a three-pole switch Web: www.shuyitop.com; Tel/Fax: 0086-577-62840011 Wechat/WhatsApp: 008613355775769 #ZJSHUYI #Chinashuyi #shuyitop #swtiches #Dualpower

The #frequencyconverter is a power conversion device, which converts the three-phase alternating current of fixed frequency and fixed voltage input to the frequency converter into three-phase alternating current with adjustable frequency and adjustable voltage. It is composed of #inverter (DC to AC), braking unit, drive unit, detection unit and micro-processing unit. It can be roughly divided into four parts. They are the main circuit, rectifier, smoothing circuit and #inverter . These parts also undertake their own tasks. Through cooperation, the inverter can realize the corresponding operation and change the current of the motor, so as to realize the control of the equipment. Of course, the role of the #inverter is also very significant, which also makes its application More generally。 www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter #converter #inverters #vfds #invertersprice #vfdmarket

The soft starter utilizes the electronic switching characteristics of the three pairs of thyristors, and controls the timing of the trigger pulse through the microprocessor in the starter to change the size of the trigger delay angle, and the size of the trigger delay angle of the thyristor can also change the conduction of the thyristor. time, thereby ultimately changing the magnitude of the three-phase voltage applied to the stat winding. The characteristic of the soft starter is that the motor torque is approximately proportional to the quadratic of the stat voltage, and the current of the motor is proportional to the stat voltage. Therefore, the limit of the starting torque and initial current of the motor can be realized by controlling the stat voltage. . The soft starter motor stat voltage is controlled by the conduction angle of the thyristor, so different initial phase angles can achieve different terminal voltages to meet different load starting characteristics. During the sta

The working principle of the AC contactor is to use the electromagnetic force to cooperate with the spring force to realize the connection and disconnection of the contacts. The AC contactor has two working states: de-energized state (release state) and electrified state (action state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, the armature is pulled in, and the connecting rod connected to the armature drives the contact to move, so that the normally closed contact breaker is in an electrified state; when the attraction coil is de-energized, the The electromagnetic attraction disappears, the armature is re-opened, the normally open contacts are closed and released under the action of the position spring, all the contacts are reset accordingly, and the contactor is in a power-off state. The AC contactor uses the main contact to control the circuit, and uses the auxiliary contact to conduct the control circuit. The main contacts are

Maintenance requirements in the day-to-day operation of the frequency converter 1. Check whether the cooling system is normal, and clean the dust of the air filter. 2. Check whether the screws, bolts and other fasteners of the inverter are loose, and perform necessary tightening; for the parts with soldering and crimping terminals, check whether there is corrosion, discoloration, cracks, damage, etc., and also check the frame Whether the structural parts are loose, whether the conductors and wires are damaged, etc. 3. Check whether the connection of the control circuit board is loose, whether the capacitor is leaking, whether the lines on the board are rusted, broken, etc. 4. Check whether the filter capacitor is leaking and whether the capacitance is reduced. 5. Check whether the insulation resistance is within the normal range. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter #shuyitop #converter

The role of the relay: 1. Expand the control range: For example, when the control signal of the multi-contact relay reaches a certain value, multiple circuits can be replaced, cut off and connected according to the different forms of the contact group. 2. Expansion: For example, sensitive relays, intermediate relays, etc., can control high-power circuits with a small amount of control. 3. Integrated signal: For example, when multiple control signals are input to the multi-winding relay in a specified form, they are more integrated to achieve a predetermined control effect. 4. Automatic, remote control, monitoring: For example, the relay of the automatic device can form a program control circuit together with other electrical appliances to realize automatic operation. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #VFD #ZJSHUYI #Chinashuyi #shuyitop #BypassContactor #frequencyinverter #inverters #relay

1. Fan: With the continuous development of the industry, the application of fans is becoming more and more extensive, especially in the chemical, stone, and textile industries that can be applied to fans. In the fan design, there is a problem of excessive air volume. When the air volume needs to be adjusted, throttling is generally used, that is, the damper adjustment method, which is unnecessary loss. After using frequency conversion speed regulation, it can be easily adjusted according to actual needs. Unnecessary losses are removed, and the power factor is improved at the same time, and the comprehensive power saving rate is above 30%. 2. Speed regulation machinery: In the machinery that needs speed regulation, such as: extruder, material feed regulation, conveyor belt, etc., basically use slip regulation motor, three-phase commutator motor or DC motor speed regulation, speed regulation of speed regulation motor Poor performance, poor speed stability, high failure rate and low effic

1. The dual power automatic transfer switch is mainly composed of two miniature circuit breakers, a motor, a controller and a mechanical rotating device. The switch work has three status positions for users to choose, common power supply (N close), double split (manually required), standby power close (R close). 2. Adopt high breaking miniature circuit breaker, which has breaking capacity and characteristics of circuit breaker. 3. The structure is simple and practical, the operation is convenient, and it has the advantages of no noise, small impact force and long service life. 4. It has electrical interlocking and mechanical double interlocking to ensure that the two power sources cannot supply power at the same time. 5. Working principle, the dual power automatic transfer switch detects the two power supplies through the controller. When one power supply is abnormal, the controller makes a logical judgment on the detection result, and drives the operating mechanism to open or close ac

Direct start is hard start. The starting current of hard start (direct start) is 3-7 times of the rated current of the motor. In the case of direct start (hard start), the situation of exceeding the rated current of the motor brings many restricted problems to the manufacturing process and structure of the motor itself. The reason why the shaft of the motor is very thick is actually because there was no soft start in the past, and the sudden overload of 5-6 times the starting impact torque of the motor brought by the hard start will break the motor shaft. This is one of the reasons why the motor shaft is designed to be thick. For low-power motors, although the current is large when starting directly, the shock torque at startup is very large for the motor, but the mechanical strength and shock resistance can still be tolerated. For high-power motors, there is a problem. The overload shock caused by the startup, the strength and capacity design of the machine and electricity are all ver

In principle, the selection of the #softstarter should be larger than the capacity of the motor being driven. The rated capacity of the soft starter usually has two kinds of nominal: one is nominal according to the power of the corresponding motor; the other is nominal according to the maximum allowable current of the soft starter. The following two points should be noted: 1) Based on the nominal rated capacity of the motor, the rated current of products with different voltage levels is different. 2) It is nominally based on the maximum allowable working current of the soft starter, and the rated capacity of products of different voltage levels is different. In addition, comprehensive consideration should be given, such as the load capacity of the soft starter, working system, environmental conditions, cooling methods, etc. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarte

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 according to the number of circuit

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 visualization, can generate current, voltage, frequency, power, etc. in real time. Detect and record the operating efficiency of the equipment, and generate a report, which can compare the efficiency data with the time period. Third: with the industrial magic box The industrial magic box can be used to view the data of the control cabinet anytime and anywhere through the APP on the mobile phone, which is convenient for the continuation of the data calculation work related to the collection and arrangement of a large amount of data. It can be more convenient to monitor the operation status of the equipment. If th

How to measure the quality of soft starter 1. Visual observation. Through visual inspection, we can observe whether the soft starter has the following phenomena: The soft starter has strong damage, and the damage is usually caused by collision, fire, water, dust, load short circuit, etc. Treatment method: It can be sent back to the manufacturer for repair depending on the damage. 2. Smell. Whether the soft starter body has a burnt smell, the damage is usually caused by excessive current or excessive load. Treatment method: It can be sent back to the manufacturer for repair depending on the damage. 3. Listen. Check the soft starter for any abnormal noise, and stop immediately if there is any abnormal noise. Do not connect power factor compensation capacitors to the starter output. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #softstartechnology #solidstatesoftstarter #latestpowerstarter #multifunctionalmotorsoft

First select according to the motor nameplate parameters. First understand the motor model, rated voltage, rated power, rated stator current, rated rotor current, torque, frequency of use, etc. Fully understand the load situation. If it is a light load, you can choose the standard configuration. Mechanical loads such as belt conveyors, ball mills, brick machines, crushers, etc. are all heavy loads. In this case, increasing the capacity of the #softstarter can improve the service life of the product. In the long run, it will reduce maintenance costs. Then look at the quality of the grid. Due to different working principles, some soft starters have a large starting current when they are working. If the grid voltage is low, only those with a small starting current, such as magnetic control soft starters and variable frequency starters, can be selected. In addition, the quality of power grid power supply and whether the inverter and reactive power compensation device are running in parall

The working principle of the AC contactor is to use the electromagnetic force to cooperate with the spring force to realize the connection and disconnection of the contacts. The AC contactor has two working states: de-energized state (release state) and electrified state (action state). When the attraction coil is energized, the static iron core generates electromagnetic attraction, the armature is pulled in, and the connecting rod connected to the armature drives the contact to move, so that the normally closed contact breaker is in an electrified state; when the attraction coil is de-energized, the The electromagnetic attraction disappears, the armature is re-opened, the normally open contacts are closed and released under the action of the position spring, all the contacts are reset accordingly, and the contactor is in a power-off state. The AC contactor uses the main contact to control the circuit, and uses the auxiliary contact to conduct the control circuit. The main contacts are

1. Low speed and high torque output The original advanced current vector control technology and the self-detection function of motor parameters can output high torque characteristics even at very low speeds. 2. Fast rev tracking Without relying on any hardware facilities, it can accurately judge the direction and speed of the motor. A variety of tracking methods to meet the application of different occasions. 3. Instantaneous power failure function When the power grid is cut off and the power is turned on again, the energy generated by the motor itself is used to maintain normal operation. After a sudden power failure, there are two ways to deal with it, which is especially suitable for occasions where sudden shutdown is not allowed. 4. Strengthen the three-proof treatment The use of multiple high-quality conformal paint spraying enhances the environmental adaptability of product applications. The PCBA of the whole series of products is treated with imported conformal paint, which has

The dedicated solid state relay can have the functions of short circuit protection, overload protection and overheat protection, and the combination logic curing package can realize the intelligent module required by the user, which can be directly used in the control system. Solid state relays have been widely used in computer peripheral interface equipment, constant temperature systems, temperature regulation, electric furnace heating control, motor control, numerical control machinery, remote control systems, industrial automation devices; signal lights, dimming, flashers, lighting stage lighting control systems; instruments; Instruments, medical equipment, copiers, automatic washing machines; automatic fire protection, security systems, and power capacitor switches as power factor compensation for power grids, etc. In addition, they are widely used in chemical, coal mines and other occasions that require explosion-proof, moisture-proof and corrosion-proof . Web: www.shuyitop.com; T

As we all know, the inverter is a refined machine composed of multiple electrical components. Because the multi-style and rich accessories bring many different characteristics to the inverter, what basic knowledge points do you need to know about the inverter? 1. What is the difference between PWM and PAM PWM is the abbreviation of Pulse Width Modulation (Pulse Width Modulation) in English. It is a modulation method that changes the pulse width of the pulse train according to a certain rule to adjust the output and waveform. PAM is the abbreviation of Pulse Amplitude Modulation (Pulse Amplitude Modulation) in English. It is a modulation method that changes the pulse amplitude of the pulse train according to a certain rule to adjust the output value and waveform. 2. How does the torque of the motor change when V and f are changed proportionally? When the frequency drops, the voltage is completely proportionally reduced, then the AC impedance becomes smaller and the DC resistance remains

1. The motor can't get up There are two reasons why the motor cannot start. One is that one of the six thyristors is unreliable or non-conductive, the one-phase circuit passes half-wave DC, and the two-phase winding of the motor passes through the DC to start the motor. When the braking effect is reached, not only the motor cannot be started, but also the motor and the thyristor will be burned in serious cases. The second is that the motor cannot be started due to improper starting parameters or starting curve, which is the most common fault problem. 2. The thyristor is burnt The thyristor is destroyed or exploded. This kind of failure has nothing to do with domestic and foreign brands, but the failure rate is lower than that of the contactor. The main problem appears in the installation technology of the pie-type thyristor. 3. Controller burnout Compared with the soft starter, the controller burns the most seriously. Some manufacturers have this failure with repair rates in excess

There is a reliable mechanical interlocking device and electrical interlocking protection between the two circuit breakers, which completely eliminates the possibility of closing the two circuit breakers at the same time. 1. The intelligent controller adopts the single-chip microcomputer as the control core, the hardware is simple, the function is powerful, the expansion is convenient, and the reliability is high. 2. With short circuit, overload protection, overvoltage, undervoltage, phase loss automatic conversion function and intelligent alarm function. 3. Automatic conversion parameters can be freely set externally. 4. It has the function of intelligent protection of operation motor. 5. The device is equipped with a fire control circuit. When the fire control center sends a control signal to the intelligent controller, both circuit breakers enter the open state. 6. The computer networking interface is reserved for the realization of four remote functions such as remote control, remo

The miniature circuit breaker has the characteristics of advanced structure, reliable performance, strong breaking capacity, beautiful appearance and compact appearance. It is used for overload and short-circuit protection of lighting, distribution lines and equipment in office buildings, residences and similar buildings, and can also be used for infrequent on-off operations and conversions of lines. Mainly used in various places such as industrial, commercial, high-rise and residential buildings The miniature circuit breaker consists of the following main parts: 1. Breakable contact connection. It consists of fixed contacts and movable contacts. 2. Devices consisting of metal cylinders or insulating cylinders, in which disconnectable contact connection and arc extinguishing equipment and transmissions are installed. 3. The transmission device that drives the contact. 4. Arc extinguishing equipment. Web: www.shuyitop.com; Tel/Fax: 0086-577-62840011 Wechat/WhatsApp: 008613355775769 #ZJ

A relay is an electrical control device, which is an electrical appliance that makes a predetermined step change in the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. Relay is an automatic switching element with isolation function. It is widely used in remote control, telemetry, communication, automatic control, mechatronics and power electronic equipment. It is one of the most important control elements. The relay generally has an induction mechanism (input part) that