The first way to use the inverter is to change the output frequency to achieve the controllability of the motor speed, so do you know what steps to complete the output frequency controllability? One of the first key points is how to complete the change of the frequency signal supplied by the frequency conversion equipment, here the signal is generally called the "frequency given signal", and the frequency signal supply method is as follows:
1. The most straightforward way to give the abbreviated frequency conversion frequency is to complete it through the operation panel. The user can generally change the set frequency directly via the potentiometer, cosmic button, or rise and fall buttons. The biggest advantage given by the operator panel is that it is simple and convenient, and at the same time has the function of monitoring, that is, it can display the current, voltage, and speed of the inverter in real time.
2. If the keyboard number key or the rise and fall keys are given, then the number is the most given, and the accuracy and resolution are very high. If the potentiometer on the optional operator is given, it is an analog given, and the accuracy is slightly lower, but because there is no need for other wiring like the analog input of the external potentiometer, the practicality is very high.
3. The external potentiometer is given to adjust the frequency through the potentiometer input from the outside.
4. The multi-function input terminal supplies the multi-function input terminal to the inverter to change the set frequency value of the frequency conversion equipment, and the frequency converter can be the output point of the external button or PLC relay. In the variable frequency function input terminal, two or more terminals are used to supply the frequency after the function is set.
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Abnormal handling of inverter series reactor - Reynolds
Capacitor series reactors generally adopt epoxy glass fiber multi-encapsulated parallel structure, according to the characteristics of the device site, three-phase vertical stacking, three-phase horizontal "△" and three-phase horizontal "-" type distribution.
The substation in the southern area ...
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DCS and PLC and other control cabinets are inspected before leaving the factory
1. Test preparation:
1. It is necessary to remove all power switches before powering on the PLC control cabinet or IO cabinet.
2. It is necessary to completely cut off the connection between the PLC or DCS card and the outside. All front adapters are to be loosened and raised.
3. Check the power terminal wires and connectors.
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Reynolds inverter code function description
F09 second acceleration time 0.10 - 999.9sec; 5.0sec； △** The acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched by terminal X3 (see F55);
F10 second deceleration time 0.10 - 999.9sec; 5.0sec； △**Acceleration and deceleration parameters and the second acceleration and deceleration parameters are switched ...
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Frequency converter soft troubleshooting – Reynolds
Undervoltage is also a problem that we often encounter in application. Mainly because the voltage of the main circuit is too low (220V series is lower than 200V, 380V series is lower than 400V), the main reason: a certain way of the rectifier bridge is damaged or there is abnormal operation in the three ways of the thyristor, which may lead to the appearance of undervoltage problems, ...
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How to determine the frequency of start-up – Reynolds
Generally, most motors start to speed up from 0Hz, but in some special cases, it is necessary to start directly from a certain frequency. At this time, the frequency output of the VFD at the moment of activation is the activation frequency. In general, you need to set the activation frequency in the following situations.
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Classification of Reynolds inverter types
1. Classified according to the input voltage level
According to the input voltage level, the inverter can be divided into low-voltage inverter and high-voltage inverter, and the low-voltage inverter is common in China with single-phase 220 V inverter, three-phase 220 V inverter, and i-phase 380 V inverter. High-voltage inverters are commonly used in 6 kV, 10 kV transformers.
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When the differential pressure flowmeter (V-cone flowmeter) is used in the field, it often encounters such and such problems, but the reason for it is investigated, as long as it is installed correctly, the primary problem is on the secondary surface differential pressure transmitter, and the following is the first to introduce these problems to us ...
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Application misunderstandings and drawbacks of inverter and countermeasures - Reynolds
Misunderstanding: connect electromagnetic switches and electromagnetic contactors in the output circuit of the inverter
In actual use, some occasions require the use of contactors for frequency converter switching: such as when the frequency conversion is faulty, switch to the power frequency operation, or when the one-to-two method is adopted, a motor is faulty, and the variable frequency is used.
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Inverter control method - Reynolds
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Structural characteristics of Reynolds RHY series inverter governor
1. Advanced technology: (PC or PLC) is used to make the equipment complete the intelligent constant pressure variable supply water supply according to the requirements of water supply and fire protection;
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Reynolds inverter control panel and code function description
1. Clarification of the function of the control panel
1. FUN button; Press the FUN button to enter the settings menu F00;
2. Press and hold the up or down button to scroll to the code you need to set;
3. At this moment, press the FUN button to confirm, and adjust the entry parameters to the required value;
4. After the adjustment is completed, ...
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Introduction to the appearance of Reynolds inverter
Bypass cabinet: The cabinet is equipped with high-voltage inlet and outlet isolation switches QS1 and QS2, as shown in Figure 2. Among them, QS1 is a single-pole single-throw variable frequency incoming knife switch, and QS2 is a single-pole double-throw power frequency and variable frequency outgoing knife switch. The bypass cabinet is a high-voltage environment, please observe the live display and electromagnetic lock status to ensure that the ...
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Precautions for installation of Reynolds low-voltage inverters
1. Safety precautions
1. The primary requirement is to have certain electrical professional knowledge, and understand the job site, understand the equipment status, and have certain electrical operation technology.
2. Determine the electrical ...
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Lightning protection measures for Reynolds frequency converters
The lightning protection measures of the inverter equipment are another important peripheral measure to ensure the safe operation of the inverter, especially in the area where lightning is active or in the lively season, this problem is particularly important.
Today's inverter products are generally equipped with mines.
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The motor itself:
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3) Improper selection of bearings.
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Reynolds JJR5000 introduction to soft starters
The cost performance of Reynolds JJR5000 soft starter is relatively high, which is mainly reflected in the following aspects:
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Indicator of Reynolds inverter cabinet wiring
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Current level: The current level should match the rated current of the motor to ensure electrical safety and normal operation of the equipment.
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Reynolds universal inverter start-up mode
1. Direct launch
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Second, the speed of the tracking start
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Inverter breakdown factor – Reynolds
1. Overpressure leads to brake pipe breakdown.
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The Reynolds SVG series was successfully completed
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