ZJSHUYI The function of the relay base is as follows. www.shuyitop.com; ...

The function of the relay base is as follows: (1) Current relay: reflects the increase of current and acts as the starting element and measuring element of current protection. (2) Voltage relay: It acts to reflect the change of voltage (over or under). (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 to control different circuits; increase the contact capacity to disconnect or connect circuits with larger currents; provide the necessary delay to meet protection and automatic devices requirements. (5) Signal relay: used as action indicator in protection and automatic devices. www.shuyitop.com; Tel/Fax: 0086-577-62840011 WhatsApp: 008613355775769 #ZJSHUYI #Chinashuyi #shuyitop #relay #relaybase

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

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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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