Zhejiang SHUYI Electric Co., LTD

1. The function of relay base is as follows: (1) Current relay: acting to reflect the increase of current, it acts as the starting element and measuring element of current protection. (2) Voltage relay: reflects the voltage change (too low or too low) and the action. (3) Time relay: as a time element, it is used to establish the necessary action delay. (4) Intermediate relay: its function is to increase the number of contacts in order to control different circuits; Increase the contact capacity to disconnect or switch on the circuit with high current; Provide the necessary delay to meet the requirements of protection and automatic devices. (5) Signal relay: in the protection and automatic device as an action indicator. Web: www.shuyitop.com; Tel/Fax: 0086-577-62840011 Wechat/WhatsApp: 008613355775769 #ZJSHUYI #Chinashuyi #shuyitop #breakers #MCB #MCCB #Baserelay

Fire control cabinet (automatic control cabinet) is a kind of industrial control equipment that is more common in our lives, such as corridors, underground parking lots, gas stations and other public places. However, many friends do not know what it is called or what it is used for. The following ZJSHUI editor will explain what is a fire control cabinet. The fire control cabinet is a safe fire fighting tool provided by the pump factory. Its main purpose is to protect the pump motor from overvoltage, short circuit and overload. And also has a sound and light alarm function. It plays an important role in extinguishing fire and is also a fire safety device that can help control the fire after a fire occurs. There are many ways to start the control cabinet, including direct start, soft start, star-delta start, auto-coupling start, etc. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #motorsoftstar #softstarters #ZJSHUYI #Softstartcabinet

The phenomenon of inverter overcurrent (1) When restarting, it trips as soon as the speed increases, which is a very serious phenomenon of overcurrent. The main reasons are: the load is short-circuited, the mechanical parts are stuck; the inverter module is damaged; the torque of the motor is too small, etc. (2) It jumps when it is powered on. This phenomenon generally cannot be reset. The main reasons are: the module is broken, the drive circuit is broken, and the current detection circuit is broken. (3) When restarting, it does not trip immediately but during acceleration. The main reasons are: the acceleration time setting is too short, the current upper limit setting is too small, and the torque compensation (V/F) setting is high. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #VFD #INVERTER #frequencyinverter #frequencyconverter

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. Our website :www.shuyitop.com. will always update the latest industry information and product information, you can pay attention to it when you are free. Thanks in advance ! www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #softstarter #frequencyconverters#automatictransferswitches #ACcontactors #switches #relays#chinashuyi #shuyitop #MCCB

The AC contactor uses the main contact to open and close the circuit, and uses the auxiliary contact to execute the control command, so as to complete the power switch and control circuit. Normally, the main contact generally has only normally open contacts, and the auxiliary contact often has two pairs of normally open and normally closed functions of the contact. Next, it is described in detail through its composition, classification, basic parameters, selection parameters, operation and maintenance. It is mainly composed of four parts :(1) electromagnetic system (2) contact system (3) arc extinguishing device (4) insulation shell and accessories The selection parameters of AC contactor include: rated voltage; Rated current; Rated voltage of the coil; Frequency of operation; Working current of auxiliary contacts. Here is also an introduction to the points of attention in the selection of rated current: continuous operation of contactor, according to the selection of 67-75%, for exam

The AC contactor uses the main contact to open and close the circuit, and uses the auxiliary contact to execute the control command, so as to complete the power switch and control circuit. Normally, the main contact generally has only normally open contacts, and the auxiliary contact often has two pairs of normally open and normally closed functions of the contact. Next, it is described in detail through its composition, classification, basic parameters, selection parameters, operation and maintenance. It is mainly composed of four parts :(1) electromagnetic system (2) contact system (3) arc extinguishing device (4) insulation shell and accessories The selection parameters of AC contactor include: rated voltage; Rated current; Rated voltage of the coil; Frequency of operation; Working current of auxiliary contacts. Here is also an introduction to the points of attention in the selection of rated current: continuous operation of contactor, according to the selection of 67-75%, for exam

1. It is required to reduce the starting current of the motor. 2. In normal operation, the motor does not need to have the function of speed regulation, only to solve the working state of the starting process. 3. The load is not allowed to reduce voltage and speed during normal operation. 4. If the motor power is larger than 100kw, it will cause bad influence to the operation of the main voltage transformer when starting. 5. The operation of the motor has strict requirements on the grid voltage, and the voltage drop is no more than 10%U. 6. No starting impact is allowed when the equipment starts. 7. The starting torque of the equipment is not large, and it can be started with no load or light load. 8. Medium and large motors need energy-saving starting. From the initial investment, it is more economical to use autocoupling step-down starting for motors with power below 75KW, while it is more economical to use soft starter for motors with power between 90-250kw. www.shuyitop.com; Tel/F

A relay is a component that is often used as a switch in a circuit. According to the type of control voltage required by its coil, it can be divided into AC relays and DC relays. The specifications of the relay are expressed by the coil control voltage and the contact current. Usually, when the load current is less than 10A, the contact of the relay can be used to directly connect or cut off the circuit. When the load current is too large, it can be used as an indirect control part. Relays are generally composed of iron cores, coils, armatures, contact springs, etc. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, and an electromagnetic effect will be generated. contacts (normally open contacts) attract. After the coil is powered off, the electromagnetic attraction also disappears, and the weighing iron returns to its original position under the reaction force of the spring, releasing the moving contact and the original sta