What should I do if the soft start often alarms for overload?

Usually, people always choose frequency conversion according to the motor power, in fact, to be precise, it should be selected by the actual current of the load.

The current of your motor at the power frequency has reached full load, and after the frequency conversion, due to the harmonics in the frequency conversion, the operating current is larger than the power frequency (about 10%), so the frequency conversion you choose is a bit smaller.

According to the actual operation current of the motor to select the frequency conversion, it is not required that the frequency conversion capacity must be greater than the motor power, if the current of your motor at the power frequency is only 6A, then even if you choose 4kw frequency conversion, it is fine.

I used to use 45kw frequency conversion to drive 75kw fans, and I also used 22kw frequency conversion to start 30kw water pumps, and they have been operating normally for many years. Of course, the premise is that these loads are very light.

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How to deal with the pro-soft start overload protection is as follows: the soft starter has a current overload protection function, and the overload protection function is realized by setting the parameters on the soft starter panel, and the overload protection function is mainly how many times the overload current is the rated virtual current and the current exceeds the set value time. An overload fault indicates that the current is high and the cause needs to be identified.

Most soft starters have adjustable initial voltage, because the initial voltage determines the initial torque, the initial voltage is set according to the load torque, the setting is too small to start or the start time is too long; If the setting is too high, the start-up will cause mechanical shock, and the start-up current will be too large; No-load start, set the starting voltage to 10%-15% of the rated voltage, medium load and heavy load start, you can set the starting voltage to 40%-70% of the rated voltage. 2. Start time and parking time setting: The start time is mostly set in about 10s, and the parking time is set in 20s.

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Hello, soft start overload protection treatment method: 1. By selecting a forcibly cooled motor or a water-cooled motor, as well as a motor that meets the requirements of the actual working system of the core limb. 2. The speed of the motor is regulated by adding a frequency converter, and if the load is too large, the motor load can be reduced by adjusting the speed of the motor (except for the constant torque load).

3. If there is a shortage of load during starting, the dynamic torque of the banquet can be reduced by the inverter or soft starter. Extended Information:How does the motor work:

The direction of the force on the conductor is determined by the left-handed rule. This pair of electromagnetic forces forms a moment acting on the armature, which is called electromagnetic torque in a rotating electric machine, and the direction of the torque is counterclockwise, in an attempt to make the armature rotate in a counterclockwise direction. If this electromagnetic torque can overcome the resistance torque on the armature, such as friction and other load torques, the armature can rotate in a counterclockwise direction.

Fault-F01 (Instantaneous Stop) This fault occurs because the terminal blocks 7 and 10 are open, and can be solved by using the wire short terminal blocks 7 and 10. The cause of this failure is generally due to the wrong external control wiring. If the user does not particularly need external control, you can set the parameter of the internal function code "9" (control mode) of SoftStart to "1" (keyboard control) to avoid this failure.

Fault-F02 (Startup time is too long) This fault is that the current limit value of the soft starter is set too low, so that the startup time of the soft starter is too long, in this case, the parameter of the function ** "4" (limiting the startup current) inside the soft start can be set higher, which can be set to times. It must be noted that the power of the motor matches the power of the soft starter, if not, in the case of a large difference, blindly set the parameters to 4 5 times, and after starting and running for a period of time, the silicon module or thyristor inside the soft start will be burned out due to excessive current. Fault-F03 (Overheating) This failure occurs due to the fact that the soft starter starts too often in a short period of time, so do not start more than 12 times per hour when operating the soft start.

Fault-F04 (Input Phase Loss) The factors that cause this fault are: Check whether the incoming power supply and motor wiring are loose; Whether the output is connected to the load, and whether the load matches the motor; Use a multimeter to detect whether the module or thyristor of the soft starter has breakdown, and whether their trigger gate resistance meets the requirements under normal conditions (generally 20 30) and whether the internal wiring socket is loose. These factors can lead to the occurrence of this failure, which can be eliminated with careful detection and correct judgment.

Fault - F05 (Frequency Error) This fault is due to a problem with the soft starter processing the internal power signal, which caused the power supply frequency error of Songheng. In this case, you need to consult the company's product development software design engineer to deal with it. Mainly work on the improvement of power supply circuit design.

Fault-f06 (parameter error) If this fault occurs, you need to reboot the computer and enter the factory value once. Specific operation: first disconnect the control power of the soft starter (AC 220 V), press and hold the "PRG" button on the soft start control panel with one finger, then send the control power of the soft starter, release the "PRG" button after about 30 s, and re-enter the current factory value.

Fault-F07 (start-up over-current) The start-up over-current is caused by the load being too heavy and the start-up current exceeds 500% times, the solution is to set the internal function code "0" (starting voltage) of the soft start higher, or set the function code "1" (rise time) longer, which can be set to: 30 60s.

There is also whether the current limit value of ** "4" is set appropriately, which can generally be 2 3 times. Fault-F08 (Running Overcurrent) The main cause of this failure may be the soft start during operation, which causes the mold to be too heavy due to heavy load.

Summary. In the process of use, the soft starter is prone to some failures, if these faults cannot be dealt with in time, then the normal operation will be affected, so here is a summary of the common faults and treatment methods of the soft starter.

In the process of using the soft starter, the slang is prone to some failures, if you can't deal with these faults in time, then the normal operation will be affected, so here is a summary of the common faults and treatment methods of the soft starter.

When the live mode is used in the noisy argument mode, the operation sequence is wrong. (The correct operation sequence should be to send the main power supply first, and then send the control power supply) The power supply is out of phase, and the soft starter protects the action. The output of the soft starter is not connected to the load.

The soft starter will not work properly until the output is terminated with a load).

In the process of starting, the protection Chang or device malfunctions due to the small setting. (The protective device can be re-tuned) During debugging, the parameter setting of the soft starter is unreasonable. (Mainly for the soft exciton rental starter below 55kw, the parameters of the soft starter are reset) Poor contact of the control line.

Check the control of the Ming Zhao line).

The setting value of the long delay of the air switch is too small or the air switch selection and the motor are not matched. (The parameters of the air switch are appropriately amplified or the air switch is re-selected) The starting voltage parameters of the soft starter are set too high or the starting time is too long. (According to the load situation, the starting voltage is appropriately reduced or the starting time is appropriately shortened) In the process of starting, due to the large fluctuation of the grid voltage, it is easy to cause the soft starter to issue wrong instructions, and the phenomenon of knowing the sunhuai bypass in advance occurs.

It is recommended that users do not start high-power motors at the same time) Start the stool at full load when starting. (Try to reduce the load when starting).

If you don't need to inquire about other questions, end the conversation and give a like, thank you.

If you still call the police, it means that your stuff is really overloaded, and you can delete it.

This is not the load of your equipment, is there any foreign object stuck during normal operation

The load is too heavy, or there is a problem with the circuit, find a technician to see what to replace, don't have a big problem.

Check if your master really has an overload phenomenon and rule out the cause of the failure.

See whether the motor is overloaded, measure the motor running current and the soft starter rated current comparison, and the soft starter's overload protection settings to see if the setting is too small. Sovi Electric.

Then it is best to find a professional master to take a look, the key is about the system.