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 cabinet is in a high-voltage environment, please observe the live display and electromagnetic lock status, and ensure safety before opening the cabinet door.
Transformer cabinet: A phase-shifting transformer is installed in the cabinet, with an input AC10000V and an output AC720V, which is used to supply power to the power unit. The transformer cabinet is a high-voltage environment, and before opening the cabinet door, it must be determined that the system is not on the high-voltage.
Power cabinet: Three layers of power units are installed in the cabinet, with 8 units on each layer. The power cabinet is a high-voltage environment, and it is forbidden to open the cabinet door when the equipment is live.
Control cabinet: The cabinet is the various control components of the high-voltage inverter, as shown in Figure 3, and its important components from top to bottom are: main control box, PLC, relay, air switch, terminal block, switching power supply, UPS. As shown in Figure 4, the air switch from left to right is: transformer thermostat switch QF1, transformer cabinet top fan switch QF2, power cabinet top fan switch QF3 and control power switch QF4. It should be noted that when the inverter is not on the high voltage, please ensure that the QF4 is closed, and before the inverter is powered on at high voltage, please ensure that all the above air is closed and closed. In addition, the UPS power supply is supplied by QF4, please do not disconnect QF4 without special circumstances, if QF4 is powered off, please close the UPS to prevent the UPS from discharging for a long time and damaging its internal battery.
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Inverter starts the overload adjustment parameter - Reynolds
Motor overload: There is no need to set overload maintenance parameters in frequency conversion.
The inverter generally acquiesces to the motor overload maintenance based on the motor power. Generally, it is 1.2 times and 60 seconds will report an overload failure. The overload factor is not the same for different frequency converters.
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The solution to the low or high output of the differential pressure transmitter – ifm
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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The heat dissipation method of the switching power supply
1. Transfer heat pipes for heat dissipation.
In many applications, heat generated from the base steel plate of the power module is transferred through the heat transfer components to the distant surface of the heat pipe. In this way, the temperature of the base steel plate of the power module will be equal to the temperature of the heat pipe heat dissipation surface, the temperature of the heat transfer parts, and the temperature of the two contact ...
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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 basic principle of vector control of frequency converters
The basic principle of vector control is to control the excitation current and torque current of the asynchronous motor according to the principle of magnetic field orientation through the measurement and control of the stator current vector of the asynchronous motor, and then achieve the purpose of controlling the torque of the asynchronous motor. Specifically, the stator of the asynchronous motor ...
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Motor overload fault solution - Reynolds
Causes of inverter failure:
1. The grid voltage is too low
2. The rated current of the motor is set incorrectly
3. The motor stall or load abrupt change is too large
4. Large horse-drawn trolley
Inverter solutions:
1 ...
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Precautions for Wiring Reynolds Inverters
1. The inverter itself has a strong electromagnetic disturbance, which will disturb the work of some equipment, so we can add a cable sleeve to the output cable of the inverter.
2. The control line in the inverter or control cabinet is at least 100mm away from the power cable, etc.
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Reynolds drive soft troubleshooting
1. Phenomenon
(1) When starting from the beginning, it trips as soon as the speed is raised. This is a very serious phenomenon of overcurrent. The main reasons are: short circuit of load, stuck mechanical parts; The inverter module is damaged; The torque of the motor is too small.
(2) Jump when powered on, this phenomenon generally can't ...
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The cause of damage to the inverter brake unit - Reynolds
The inverter motor is equipped with a mechanical brake, is the inverter motor in the power generation condition when parking? Is the brake unit of the inverter working at the moment? What are the causes of brake unit damage?
Answer: 1. The inverter motor is equipped with a mechanical brake, and when parking...
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Problems between the inverter and the motor – Reynolds
1. The power and temperature rise of the motor
Regardless of the method of the inverter, different degrees of harmonic voltage and current occur during operation, so that the motor runs under non-sinusoidal voltage and current. Rejection of material introduction, taking the sine wave PWM type inverter that is now widely used as an example, ...
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The cause of the heating of the inverter of the special machine
1. Problems of the inverter and the motor itself;
After the motor has been used for a long time, it cannot be ruled out that the insulation function is not good, or the bearing is stuck, and it may show a large current and heat. The coupling between the motor and the load may also be worn, or the motor is unbalanced in three phases, and the fixtures of the motor are loose.
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The reason for the preferred DC mode in the intermediate link of the inverter - Reynolds
The development of the inverter has experienced a slow and gradual process, and the inverter at the beginning of the first century did not choose this kind of AC-DC: communication to DC and then to communication, but direct AC, no central DC link. This kind of inverter is called alternating frequency converter, and now this kind of inverter is in the ultra-high power ...
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The internal structure of the inverter is the role of Reynolds
The inverter is mainly composed of rectifier (AC to DC), filtering, inverter (DC to communication), braking unit, drive unit, detection unit and microprocessor unit.
The inverter adjusts the voltage and frequency of the output power supply by the internal IGBT break, and ...
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Reynolds drives RNB1000 series fault code resolution
Reynolds inverter fault codes:
E.bC
Reynolds inverter fault phenomenon/type:
Brake unit failure
Reynolds inverter failure may be caused:
1. Brake line failure or brake ...
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Reynolds soft starter problem solving
1. The soft starter does not start and the fault-free code appears, perhaps because the control power supply is not connected, the solution is to check the power supply of the control power supply to see if the circuit connection is correct.
2. The motor starts when the motor announces a hum/no start signal, perhaps because of the thyristor/module ...
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Reynolds inverter overhaul process
1) Query and query fault phenomena. The fault phenomenon of the inverter is varied, for example, the same type of problem may have different problem phenomena, and different types of problems may have the same kind of problem, which brings difficulties to find the problem. However, the problem phenomenon is the fundamental basis for repairing the inverter ...
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Key points for the selection of AC contactors - Reynolds
1. Select varieties according to the above series according to the purpose and requirements of use
Note that the main circuit load type is strictly differentiated, whether it is DC or communication.
The communication contactor is different from the DC contactor, and is only suitable for DC-1 to DC-5 loads when used for DC loads.
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AC servo motor with inverter control method - Reynolds
Because the inverter and servo are different in performance and function, and the use is not very different, it is not possible:
1) In the case of speed control and torque control, the general frequency converter is not very high, and there are also frequency converters that are used to react signals in the upper position to form a closed loop.
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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;
2. High efficiency and energy saving: the system can set the pressure according to the demand, and the system can actively adjust according to the set pressure.
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The cause of the damage of the inverter - Reynolds inverter
What are the causes of inverter damage?
First, the heat dissipation of the inverter is not good
In fact, we all know that too high a temperature can have a damaging effect on any device, just like the human brain, too high a temperature can also burn out the brain ...
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