Dual-fan inverter selection - Schneider

1 Contingency plan Contingency plans are the top priority of preventive protection. Arrangements need to be better partnered with service providers to be part of the corporate programme. This means implementing processes and procedures for every type of thing, including contingency plans. ...

1. Accounting of inverter capacity when the load is continuously changed periodically In many cases, the load of the motor changes periodically. Obviously, in this case, picking the capacity of the inverter according to the minimum load will be overloaded, and it will be uneconomical to select according to the maximum load.

1. Air circuit breaker is an active electrical appliance that can not only touch and disconnect the circuit normally, but also operate under abnormal conditions such as overcurrent, reverse current, short circuit and loss (under)voltage. Its primary role is to maintain the electrical equipment in the AC and DC circuits, and it can also operate the circuits infrequently. ...

1. XCKN compact limit switch Light and medium load use; Waist-shaped device holes for easy adjustment of mechanical errors; Bipolar isolation definitely disconnects the contacts; External waterproof sealing joint, the protection level is higher than that of rubber sleeve sealing pipe; Engineering plastic body, avoid temperature ...

1. According to the requirements of measurement intention: It is required to select the unit with instantaneous flow rate or cumulative flow rate (cumulative flow), the unit of flow display, measurement accuracy, repeatability, linearity, flow scale and scale, measurement temperature, pressure loss, temperature and pressure compensation, output signal characteristics and echoes.

1. How to complete the control of ATV38 and ATV58 through the operation panel? First, in the control menu, set "LCC" to "YES" (panel operation); Enter the "LFR" parameter in the adjustment menu, press the up and down keys to adjust the given value, and complete the control of the inverter. ...

1. LC filter LC filter is suitable for occasions with low requirements for harmonic content, and a good LC filter can control the distortion rate at 8-10%; 2. Harmonic filter This filter is suitable for harmonic ...

Protective functions can be divided into the following two categories: (1) After detecting the abnormal situation, the correction action is automatically carried out, such as overcurrent loss speed avoidance, regeneration overvoltage stall avoidance. (2) After detecting the abnormality, the PWM control signal of the power semiconductor equipment is closed, so that the motor automatically stops. As...

Fundamentals of magnetic flux vector manipulation The control of a three-phase asynchronous motor is much more messy than that of a DC motor because the current, voltage, induced potential, magnetic flux, etc., of the stator and rotor are all alternating. However, the stator winding of the three-phase asynchronous motor is a symmetrical three-phase winding, which exerts a ...

1. When installing and adjusting the appearance, the original status should be recorded for rehabilitation. 2. When repairing the appearance of fine instruments, if you accidentally bounce small parts away, you should first determine the direction where you can fly.

(1) Caused by incorrect parameter setting. If the acceleration time of the inverter is set too short, the change of the output frequency of the inverter far exceeds the change of the motor frequency, and when the inverter is started, it will trip due to overcurrent. Adjusting the acceleration time accordingly to different load conditions can eliminate this problem.

1. What type of ATS48 power supply is? The control power supply of ATS48 selects communication input, and supplies power to the controller, input and output ports through internal power processing; The control power supply of Q series products is 220V-415V; Handling of the Y-Series ...

In terms of frequency converters: The abbreviated inverter can only regulate the speed of the communication motor, and the open-loop or closed-loop can be determined depending on the control method and the inverter, which is the traditional V/F control method. Now many of the frequency conversion has been set up by mathematical models, which will communicate electricity ...

1. Air conditioning: It is generally forbidden to use UPS power supply, because the air conditioning is very large and belongs to the rational load. Not suitable for belt loads 2. Motor: It is necessary to choose a large-capacity UPS power supply, because it is a rational load, and it is ...

1. The need for stability When choosing UPS products, the customer's focus must be stability. For UPS, higher power means lower calorific value. Of course, only one of the primary factors that affect the internal temperature of the UPS is also to consider the heat dissipation planning of the machine itself. ...

P0.0——P0. 7 : Port P0 is an 8-bit open-drain bidirectional I/O port. When visiting off-chip memory, it is time-shared for a low-8-bit address and an 8-bit bidirectional data bus. When EPROM is programmed, the instruction byte is input by P0, and when the program is verified, it outputs ...

In order to keep the main Schneider circuit breaker in excellent operating condition, it is necessary to strengthen the maintenance management. 1. Insist that the air is moist or unclean, and the pipes are not clean, may have the following consequences: (1) The wet gas is decomposed into mixed gases such as hydrogen and oxygen under the action of electric arc, which damages the ...

Don't worry about the damage of the frequency conversion, disassemble the machine after the discharge; It is indispensable to ask for a diagnosis and clarify the problem at the beginning of the test; Input and output PN junction, three-phase balance and then unshelling; Look at the nameplate before powering on, the wrong voltage will blow up; The bus has no electricity to see that it is safe, and the rectifier filter is wrong ...

There are three main sources of electromagnetic disturbance to the industrial system: first, space field disturbance, which enters the system through electromagnetic wave radiation; the second is power disturbance, which directly damages the system; The third is the signal disturbance channel, which enters the system through the front and rear channels connected to the host. In order to ensure that the instrumentation ...

Rotary encoder to roll the output pulse, through the counting equipment to know its position (PLC) we usually use incremental encoders, the incremental encoder output pulse signal can be directly input to the PLC, the high-speed counter of the PLC to count its pulse signal, in order to obtain the ...