• July 06. 2021

AC drive is a device that is used to control the speed of an electric motor. The speed is controlled by changing the frequency of the electrical supply to the motor. The three-phase voltage in the national electrical grid connected to a motor creates a rotating magnetic field in it. The rotor of the electrical motor will follow this rotating magnetic field. Motor Speed Control The speed is control...

• July 07. 2021

Variable Frequency Drive (VFD) can be used in lots of fields. Variable frequency drives are widely used to control the speed of AC motors, like conveyor systems, blower speeds, pump speeds, machine tool speeds, & other applications that require variable speed with variable torque. In some applications such as speed control for a conveyor, the variable frequency drive is installed with a remote...

• July 14. 2021

To ensure the AC drive functions reliably, proper considerations must be given to installation such as the specification of the motor, incoming, outgoing cables and the environmental parameter it operates in. As with any electrical types of equipment, AC drives can deteriorate after prolonged use even if it was installed properly. It helps to spot signs of imminent damage on the AC Drive early on ...

• July 20. 2021

The following fault code will be displayed on the keypad, the fault contact output operates too. Even if a fault is the same, they are displayed differently on LCD keypad and LED keypad. These are all explained in the below table. For details, refer to the following table to identify and correct the cause of the fault. LCD keypad LED keypad F0−15 value Fault Name Possible causes Corrective actions...

• July 22. 2021

Fault number Fault Code Fault Description Possible Causes Countermeasure 1 E.oc1 Over current protection when acceleration operation Low grid voltage Check input power supply Startup during motor free rotation Restart after the motor standstill Rotating inertial of load is too large or shock load is too heavy Increase the acceleration time and reduce the sudden change of load Improper setting moto...

• July 26. 2021

FV20−M serial inverter is equipped with complete protection functions to provide efficient protection while utilizing its performance sufficiently. Some failure instructions may be displayed during operation. Compare the instructions with the following table and analyze,assess the causes and solve failures. Failure No. Failure code Failure description Potential causes Solutions Number 01 E. SC Out...

• July 28. 2021

This chapter lists all the faults messages including the possible causes and corrective actions. If the drive faults, the drive output is disabled so that the drive stops controlling the motor, and the following fault code will be displayed on the keypad, the fault contact output operates too. Even if a fault is the same, they are displayed differently on LCD keypad and LED keypad. These are all e...

• August 03. 2021

V&T E5-PA Special Inverter for Water Supply . For the characteristics of the water supply system, realizing the application requirements of multi-pump switching through single inverter, solving the impact of the start-up on the grid during the water supply process, and the sudden surge of the motor causes the system to surge, and it completely eliminates the water hammer phenomenon. The intern...