Low Frequency Settings and Protection Parameters in VEICHI Solar Drives

Environmental conditions in solar-powered irrigation systems can change throughout the day. Cloud cover, fluctuations in solar irradiance, and varying energy availability directly affect the operating frequency of solar drives.

For this reason, the low frequency protection parameters available in VEICHI solar drives play a critical role in ensuring safe, stable, and efficient system operation.

In this episode of the System Solar Power Energy Systems technical content series, we examine the low frequency settings used in VEICHI solar drives and explain how these protection functions operate.

Parameter F14.14 – Minimum Frequency Setting

Parameter F14.14 is used to define the minimum operating frequency of the motor.

This parameter determines the lowest acceptable frequency at which the motor can safely operate. When the operating frequency drops below this threshold, the drive prepares to activate its protection functions.

The minimum frequency value should be selected according to the motor specifications and application requirements.

A properly configured minimum frequency setting helps to:

* Maintain motor performance,

* Improve energy efficiency,

* Reduce unnecessary stop-start cycles,

* Support overall system reliability.

Parameter F14.15 – Monitoring Time

Parameter F14.15 defines the monitoring period during which the drive tolerates operation below the minimum frequency threshold.

When the motor frequency falls below the value defined by F14.14, the system continues operating for the specified period.

If the frequency remains below the minimum threshold after this period expires, the drive activates the protection function.

This feature helps prevent unnecessary shutdowns caused by short-term fluctuations in solar irradiance.

Parameter F14.16 – Waiting Time and Restart Management

Parameter F14.16 defines the waiting period used to manage stop-start cycles within the system.

This parameter helps prevent the motor from repeatedly starting and stopping within short time intervals.

Particularly in applications exposed to variable weather conditions, this function:

* Prevents unnecessary motor stress,

* Extends equipment lifespan,

* Improves operational stability,

* Contributes to lower maintenance costs.

Importance of Low Frequency Protection

Solar irradiation levels are not constant throughout the day. As available solar energy decreases, the drive operating frequency may also decline.

When low frequency protection parameters are configured correctly, the drive responds to these changes in a controlled manner and prevents unnecessary faults, shutdowns, and efficiency losses.

As a result, both the motor and pump system can operate under safer and more reliable conditions.

Conclusion

When used together, parameters F14.14, F14.15, and F14.16 provide an effective low frequency protection strategy for VEICHI solar drives.

Proper configuration of these parameters improves system stability, extends equipment life, and ensures safer operation under changing solar irradiation conditions.

At System Solar Power, we continue to provide not only products but also accurate technical knowledge and sustainable energy solutions for our business partners.

Follow our blog for more technical guides, parameter settings, commissioning procedures, and application examples related to VEICHI solar drive technologies.