What is the problem with the inverter showing 380C?

Inverters are very common in electrical automation applications, although inverters are safer, more efficient and energy-saving when used with motors, but the continuous operation of inverters will inevitably cause failures.

When the inverter fails, the fault of the inverter should be dealt with in a timely and effective manner, under normal circumstances, the fault of the inverter will report the corresponding fault, and the inverter fault can be quickly judged against the fault table. (Bird in the Tree Educational Electrical Design).

1. Overcurrent fault of inverter.

Fault**: OCF.

1) Fault name: inverter overcurrent fault.

2) The cause of the failure: the motor nameplate data input is incorrect: the load dragged by the motor is too heavy: the machinery is stuck; Motor stalled.

3) The method to solve the fault: check whether the motor nameplate data in the setting (SET) and motor control (DRC) menu is entered correctly; Whether the overcurrent protection threshold is appropriate: check whether the inverter selection is appropriate with the motor and load, and check whether the motor is stalled; Check if the machine is stuck.

The display of 380C when using the inverter is due to the failure of the inverter, which is mainly manifested in the low voltage.

This is the parameter value of an inverter, which should be 380V, which means the input voltage. Fault codes all start with fu.

What is this thing? You can read it according to the model of this deformation meter and understand what exactly it means for the inverter?

If the inverter display problem is concerned, it must be very difficult to achieve.

The inverter shows 380c is to show the state of a mode he is running now, under normal circumstances, what can be the problem?

Is the machine manifestation 380 this piece does not recognize the problem? You can consult this, I don't know.

What is the problem with the opposite robot 380c? You should check this on the Internet, or pay attention to some news from this professional store, it should be an error option in a certain software.

This care agent reminds of the failure in advance, and you need to see if there is no problem with the power supply, start, connection and other places, which needs to be comprehensively investigated.

Generally, it is as simple as restarting it to see if it will recur first.

The input voltage is 380V, and the output voltage is not necessarily 380V, it is related to the operating frequency, and the frequency is proportional to the voltage.

Fluctuations are normal, there will be fluctuations when working, as long as it is a motor dragged by the inverter, there is electromagnetic noise, and it is obvious with the growth of the line.

1. Motor parameters, especially the no-load current of the motor. (Current and voltage are positively correlated.) ）

2. The size of the load. (The smaller the load, the lower the voltage.) ）

Extended Information: Functions of the Inverter:

The energy saving of the inverter is mainly manifested in the application of fans and pumps. In order to ensure the reliability of production, all kinds of production machinery are designed with power drive, and there is a certain amount of surplus. When the motor cannot run at full load, in addition to meeting the requirements of power drive, the excess torque increases the consumption of active power, resulting in a waste of electric energy.

The traditional speed regulation method of fans, pumps and other equipment is to adjust the air supply volume and water supply by adjusting the baffle plate and valve opening of the inlet or outlet, and its input power is large, and a large amount of energy is consumed in the interception process of the baffle and valve. When using inverter speed regulation, if the flow requirement is reduced, the speed of the pump or fan can be reduced to meet the requirements.

The function of the motor using the inverter is to regulate the speed and reduce the starting current. In order to generate variable voltages and frequencies, the device first converts the alternating current of the power supply into direct current (DC), a process called rectification.

The law of the output voltage.

Voltage is what drives the directional movement of the charge to form an electric current. The reason why the current is able to flow in the wire is also because of the difference between high and low potential in the current. This difference is called potential difference, also known as voltage.

In other words. In a circuit, the potential difference between any two points is called the voltage at those two points. The letter V is usually used to represent the voltage.

A power supply is a device that provides voltage to both ends of an electrical appliance. The magnitude of the voltage can be measured with a voltmeter (symbol: V).

The voltage law of the series circuit: the total voltage at both ends of the series circuit is equal to the sum of the voltages at the two ends of the circuit of each part.

Formula: u=u1+u2

Parallel circuit voltage law: The voltage at both ends of each branch of the parallel circuit is equal and equal to the power supply voltage.

Formula: u=u1+u2

Ohm's law: U=IR (i is the current, r is the resistance) but this formula only applies to purely resistive circuits.

The relationship between the series voltage, the total voltage is equal to the sum of the partial voltage, u=u1+u2

The characteristics of parallel voltage are equal to the power supply voltage, u=u1=u2

Output voltage classification.

By size. Voltage can be divided into high voltage, low voltage and safety voltage.

The difference between high and low voltage is based on the voltage value of the electrical equipment to the ground. The voltage to the ground is higher than or equal to 1000 volts. The voltage to the ground is less than 1000 volts.

Among them, the safe voltage refers to the voltage that the human body is exposed to for a long time without the risk of electric shock.

According to the national standard "GB3805-83" safety voltage, the voltage series used to prevent electric shock accidents and supplied by a specific power supply is specified. China stipulates the following five levels for power frequency safety voltage, namely 42V, 36V, 24V, 12V and 6V.

Three-phase 380V input inverter, the output voltage is changed according to the output frequency change, generally the lower the output frequency, the lower the output voltage, but the highest output voltage generally does not exceed 380V.

The PWM wave output by the inverter will affect the accuracy of our meter measurement; And our general multimeter does not have a filter device, it is normal to have measurement errors, you can try to debug the ** frequency, the voltage will change.

The PWM wave output by the inverter will affect the accuracy of our meter measurement; And our general multimeter does not have a filter device, it is normal to have measurement errors, you can try to adjust the chain base test frequency, the voltage will change.

How the inverter works:

The principle of inverter (English variable-frequency drive, referred to as VFD) is a power control equipment that uses the principle of frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the working power supply of the motor.

Summary. Hello, sorry to wait. OC3 is generally a deceleration of overcurrent. Set the acceleration and deceleration time of the inverter to a longer time. If the process requirements cannot be set to length, you can add a braking resistor to try.

Hello, I'm sorry to wait for a long time. OC3 is generally decelerating and overcurrent. Set the acceleration and deceleration time of the inverter to a longer macro level. If the process requirements cannot be set to length, you can add a braking resistor to try.

Sometimes it shows 0c3 and sometimes it shows 0c1 and the pump doesn't work properly.

Hello, the inverter E0C1 alarm indicates that the overcurrent is broken when the motor is accelerating.

What's wrong with it, help analyze it.

Three-phase 380V inverter, now the output voltage is three-phase 220V, the inverter can start normally, don't know the cause of the failure?

Hello, there is no neutral line for the output of the inverter, it can only be the line voltage, 380V inverter, the rated output line voltage is 380V. It does not mean that the inverter can only output a voltage of 380V. The output of the inverter is 220V, which should be infiltrated, which is the problem of the inverter parameters being set badly.

In the motor parameter setting of the inverter, it is set to a triangle connection, and the general 380V motor, when the triangle connection is adopted, the line voltage can only be 220V, otherwise the overvoltage will burn out the motor.