Three-Phase Variable Frequency Drive ZEST 7.5kW 17A HD / 11kW 25A ND 400V

The ZEST ZQ510T7D5 three-phase frequency inverter is an industrial 7.5kW HD / 11kW ND frequency converter designed for smooth speed regulation and control of suitably matched three-phase motors. Two rated operating modes, 7.5kW / 17A (HD) and 11kW / 25A (ND), allow the inverter to be matched to different load characteristics. The 400V power supply allows the inverter to be used in workshops, manufacturing plants and industrial drive systems. Frequency regulation enables motor speed to be matched to the requirements of the production process, providing greater control over drive operation.

The ZEST ZQ510T7D5 inverter uses vector control, Torque Boost and Speed Tracking functions, and offers extensive configuration options. It enables controlled starting, smooth stopping, reversal of rotation direction and integration with industrial automation systems. Additional solutions, including Intelligent Fan Control, Three Anti-Paint and Power Anomaly Self-Check, support reliable operation in demanding industrial applications.

Two rated operating modes – 7.5kW HD and 11kW ND

Heavy Duty (HD) – 7.5kW / 17A is designed for drives requiring higher overload capacity, such as suitably matched conveyors and mixers. Normal Duty (ND) – 11kW / 25A is intended for drives with less demanding load characteristics, such as pumps and fans.

What does this mean for the user? The same inverter has two rated operating modes depending on the operating conditions. The 11kW rating in ND mode does not provide the same overload capacity as the 7.5kW rating in HD mode. These modes also do not mean that two motors can be controlled independently.

Key advantages of the ZEST ZQ510T7D5 three-phase frequency inverter

• Two HD/ND rated operating modes – 7.5kW / 17A for higher overload capacity or 11kW / 25A for less demanding loads.
• Smooth motor speed regulation – allows the drive speed to be adjusted to the task without having to change mechanical gear ratios each time.
• Vector control – provides more precise torque control and more stable motor operation under changing loads.
• Torque Boost – helps achieve the required torque at lower frequencies, facilitating drive operation at reduced speeds.
• Speed Tracking – enables the inverter to take control of a motor that is still rotating, improving the restarting of drives with higher inertia.
• Soft starting and stopping – reduces sudden jerks and mechanical loads when starting and stopping the drive.
• FWD/REV rotation direction control – enables the control of mechanisms requiring operation in both directions.
• Adjustable acceleration and deceleration – allows motor response to be adapted to the requirements of the production process.
• RS485/Modbus communication – enables integration with compatible PLC controllers and industrial automation systems.
• Intelligent Fan Control – automatically manages cooling fan operation, reducing unnecessary running time.
• Three Anti-Paint – an additional protective coating for the electronics increases PCB resistance to adverse environmental conditions.
• Power Anomaly Self-Check – supports the detection of power supply irregularities and facilitates drive diagnostics.
• Built-in braking unit – extends the possibilities for controlled motor stopping in appropriately configured installations.
• Up to 16 preset speeds – frequency settings can be stored and selected via configured digital inputs.
• Built-in Simple PLC function – automatically executes speed sequences with defined durations for individual stages, without an additional PLC controller.
• PID controller – automatically adjusts drive operation according to a sensor signal, for example to maintain a set pressure.
• Motor autotuning – identifies motor parameters to facilitate matching the control settings to the drive.
• JOG operation – briefly runs the drive at a separately configured speed, useful when positioning mechanisms.

400V vector-controlled frequency inverter – precise drive control under load

The ZEST ZQ510T7D5 vector-controlled frequency inverter enables more precise motor control than basic frequency regulation. This is particularly important in applications where the load changes during operation and maintaining the required torque affects the production process.

The 7.5kW frequency converter allows motor speed to be adjusted to current requirements, increasing drive flexibility. This makes it suitable for machine tools, conveyors, feed mechanisms and installations requiring adjustable operating speeds.

Torque Boost – increased torque at low speeds

The ZEST ZQ510T7D5 inverter offers the Torque Boost function, which helps generate torque when operating at lower frequencies. This is particularly useful when the motor runs at reduced speed but still needs to overcome the mechanical resistance of the driven mechanism.

The ability to adjust Torque Boost manually or automatically allows the drive characteristics to be matched to a specific application. This facilitates speed control in conveying mechanisms, machine tools and other systems with variable loads.

Speed Tracking – smooth control takeover of a rotating motor

The ZEST ZQ510T7D5 three-phase frequency inverter uses the Speed Tracking function, enabling the control system to adapt to a motor that is still rotating when restarted. This solution is particularly useful for drives with higher inertia, where rotating components do not stop immediately after control is disconnected.

Examples include fans and rotating mechanisms that continue to spin due to inertia after the drive has been stopped. Speed Tracking helps regain control of such a motor, improving restarting and reducing sudden changes in operating conditions.

Soft starting and controlled motor stopping

The ZEST 7.5kW frequency converter allows motor acceleration and deceleration times to be adjusted. Instead of starting abruptly, the drive can gradually increase speed to the set value, reducing sudden mechanical loads.

Smooth starting helps reduce jerking in gearboxes, couplings, drive belts and other system components. The ability to configure braking also allows the stopping process to be adapted to the operating requirements, providing greater control over the drive.

FWD/REV rotation direction control – flexible operation

The ZEST ZQ510T7D5 frequency inverter allows the motor's rotation direction to be changed using the FWD/REV function. This is a practical solution for mechanisms requiring bidirectional operation, such as conveyors, feed mechanisms and suitably adapted machine tools.

The ability to configure the direction of operation allows the control system to be adapted to operator requirements and drive characteristics, facilitating repetitive production operations.

RS485/Modbus communication – integration with industrial automation

The ZEST ZQ510T7D5 three-phase frequency inverter supports RS485/Modbus communication, enabling operation with compatible PLC controllers and industrial automation systems. This allows it to be used both for standalone motor control and as part of a more complex production system.

Communication enables control commands to be transmitted and available drive operating parameters to be read. This facilitates centralised process management, integration with production lines and adaptation of motor operation to signals from a supervisory control system.

Intelligent Fan Control – intelligent cooling management

The ZEST ZQ510T7D5 inverter uses the Intelligent Fan Control function, which manages cooling fan operation according to operating conditions. This allows cooling to be adjusted to the actual requirements of the electronics.

This solution helps reduce unnecessary fan operation, lower generated noise and limit fan wear. It is particularly useful in installations where the inverter operates for extended periods or under periodically changing loads.

Three Anti-Paint – additional electronic protection

The ZEST ZQ510T7D5 frequency converter features electronics protected by a Three Anti-Paint coating. Its purpose is to increase PCB resistance to adverse environmental conditions, including moisture and factors that promote corrosion.

Additional electronic protection supports the durability and operational reliability of the inverter in industrial environments. Appropriate installation and ventilation conditions allow the benefits of this design to be utilised during everyday operation.

Power Anomaly Self-Check – power supply diagnostics

The ZEST ZQ510T7D5 frequency inverter uses the Power Anomaly Self-Check function, which supports the detection of power supply irregularities. This facilitates the diagnosis of conditions that may affect drive operation and faster identification of potential operating problems.

Combined with the inverter's protective functions, this solution enhances the ability to monitor operating parameters, which is particularly important in industrial installations requiring predictable operation.

Applications of the ZEST ZQ510T7D5 three-phase frequency inverter

The 7.5kW 400V three-phase frequency inverter is suitable for workshops, manufacturing plants and industrial drive systems. It enables motor speed regulation, controlled starting and adaptation of drive characteristics to the task being performed.

Example applications:

• Lathes and milling machines – adjusting spindle speed to the material type and machining operation.
• Drilling machines and workshop machine tools – adapting rotational speed to the requirements of the machining process.
• Industrial grinding machines – speed control of suitably adapted drives.
• Belt conveyors – regulating material conveying speed.
• Feed mechanisms – smooth control of movement and operating speed.
• Industrial fans – regulating airflow by changing motor speed.
• Pumps – adapting output to the requirements of the installation.
• Mixers – controlling rotational speed in production processes.
• Production lines – integrating the drive with automation and control systems.

Inverter selection should take into account the motor's rated voltage and current, winding connection configuration, required starting torque and load characteristics.

Technical specifications of the ZEST ZQ510T7D5 frequency inverter

ZEST ZQ510T7D5 – industrial inverter for three-phase motor control

The ZEST ZQ510T7D5 three-phase frequency inverter offers two rated operating modes, 7.5kW / 17A (HD) and 11kW / 25A (ND), combining smooth speed regulation, vector control and functions supporting reliable drive operation. Torque Boost facilitates operation at reduced speeds, Speed Tracking enables the inverter to take control of a rotating motor, and RS485/Modbus communication allows integration with industrial automation systems.

The ZEST ZQ510T7D5 400V frequency converter enables speed regulation and selection of the HD/ND operating mode according to load characteristics.