ZJSHUYI Manufacturer of high quality limit switches.www.cnswitch.cn #lim...

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: 0086-577-62840011 Wechat/WhatsApp: 008613355775769 Zhejiang SHUYI Electric Co., LTD, Focus on switches with 30 years. An original factory of switches. #limitswich #electricallimitswitch #elevatorlimitswitch #limitswitchrod #underwaterlimitswitch #valvelimitswitch #verticalinterlocksafetylimitswitch #waterresistantlimitswitches

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ZJSHUYI Usually the soft start system is composed of softstart device. w...

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Usually the soft start system is composed of softstart device, peripheral circuit and motor load. Therefore, the objects protected by the soft start system are also the soft start device, peripheral circuit and motor load. The purpose of protecting the soft start system is to ensure the safe and reliable operation of thyristor components, #softstarter equipment and circuits, and not damage or cause safety accidents under various abnormal working conditions. The premise of #softstarter protection is that the design of the soft starter itself should be correct. The thyristor components are correct and used correctly, the drive circuit and the control circuit are reasonably designed and matched with each other, so that the device can work in a good state. These measures are the basis for the safe and reliable operation of the soft starter. Only under this premise, can the devices, circuits, and equipment fail less and not fail from the inside, and the optimized system design should aim ...
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ZJSHUYI Classic case of inverter maintenance failure.www.shuyitop.com; ...

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Foreword: Inverter repairers must keep in mind that the inverter module and the drive circuit are strongly related to failures. When the inverter module bursts and damages, the drive circuit is bound to be damaged by impact. The damage of the inverter module may also be caused by the failure of the drive circuit. Therefore, whether it is a failure of the drive circuit or the inverter output circuit, it must be The inverter output circuit and the drive circuit are thoroughly inspected together. The power-on test of the main circuit must be carried out under the premise that the drive circuit is normal and can output six excitation pulses normally. Inverter power failure A 132KW inverter has a black screen fault. Part of the wire drawing machine stopped in the wire drawing workshop, and restarted production after half a month. As a result, the inverter went black after being powered on. It was judged that the switching power supply was faulty on the spot. The inverter was removed, and th...
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