Three-Phase Variable Frequency Drive (Inverter) ZEST 11kW 25A

Three-Phase Variable Frequency Drive ZEST ZQ511T7D5 is an industrial frequency inverter with a rated power of 7.5kW and an output current of 17A, designed for speed control of suitably matched three-phase AC motors. Its 400V-class power supply, 0–400Hz output frequency and adjustable acceleration and deceleration ramps allow drive operation to be adapted to process requirements.

The ZQ511T7D5 offers operator panel control, digital and analogue inputs, analogue outputs, two sets of relays and an RS485 interface. These features enable integration with external control systems and industrial automation.

Key Advantages of the ZEST ZQ511T7D5 Frequency Inverter

• 7.5kW power and 17A output current – rated parameters for controlling suitably matched three-phase motors.
• 400V three-phase power supply – designed for workshop and industrial electrical installations.
• 0–400Hz frequency adjustment – allows the drive speed to be adapted to the requirements of the application.
• Adjustable acceleration and deceleration – provides controlled starting and stopping, reducing sudden changes in speed.
• X1–X6 control inputs – enable external commands to be executed according to the inverter configuration.
• AI1/AI2 inputs and AO1/AO2 outputs – support integration with appropriately matched analogue signals.
• RS485/Modbus communication – enables data exchange with compatible PLC controllers and industrial automation systems.
• Vector control – enables motor operation to be controlled under varying load conditions.
• Preset speeds – allow frequency settings to be stored and selected via digital inputs without having to adjust the speed on the control panel each time.
• External START/STOP control – enables the drive to be started and stopped using buttons or the machine's control system.
• Adjustable upper frequency limit – allows the speed control range to be restricted according to the requirements of the motor and driven mechanism.

Advanced Control Capabilities

Vector control enables motor operation to be controlled under varying load conditions. The preset speed function allows frequency settings to be stored and selected via digital inputs without having to change the control panel settings each time.

Modbus communication via RS485 enables integration with compatible PLC controllers and industrial automation systems. Setting the maximum frequency and its upper limit allows the adjustment range to be matched to the drive requirements. External START/STOP control enables the motor to be started and stopped using appropriately configured control inputs.

Stepless Speed Control and Controlled Starting

The frequency inverter regulates the output voltage and frequency, allowing the motor speed to be changed without having to adjust mechanical gear ratios each time. The 0–400Hz frequency range enables control parameters to be adapted to different technological processes.

Adjustable acceleration and deceleration ramps allow the motor to start and stop gradually. This control method helps reduce sudden loads on gearboxes, shafts, couplings and other drive components. The permissible operating speed also depends on the motor specifications and mechanical limitations.

External Control and Analogue Signals

ZEST ZQ511T7D5 features X1–X6 control inputs, enabling control functions to be performed according to the assigned input functions and configuration.

Two analogue inputs, AI1 and AI2, allow suitable control signals to be received, while the AO1 and AO2 outputs can transmit configured analogue signals to connected systems.

Local operation is performed using the operator panel. With both local and external control available, the inverter can be configured for different drive operating methods.

RS485 and Two Relay Outputs

The RS485 interface enables serial communication with appropriately matched industrial control systems. The availability of this interface makes it easier to integrate the inverter with automation systems.

The frequency inverter features two sets of relay terminals: TA1/TB1/TC1 and TA2/TB2/TC2. They can be used to transmit configured drive status information to external signalling and control circuits.

P+ and PB Braking Circuit Terminals

The ZEST ZQ511T7D5 features P+ and PB terminals intended for the braking circuit. Their use and configuration depend on the electrical wiring diagram and the requirements of the specific drive system.

Applications of the ZEST ZQ511T7D5 Frequency Inverter

The 7.5kW 400V three-phase frequency inverter is suitable for appropriately matched workshop and industrial drives requiring speed adjustment, controlled starting or external control.

• Lathes and milling machines – spindle speed adjustment.
• Conveyors – adjustment of conveying speed.
• Pumps – adjustment of pump drive speed.
• Fans – airflow adjustment by changing rotational speed.
• Mixers – adjustment of speed to suit the process.
• Production drives – integration with external control systems.

Technical Specifications

ZEST ZQ511T7D5 – 7.5kW 400V Drive Control

ZEST ZQ511T7D5 frequency inverter combines stepless speed adjustment with advanced external control, an RS485 interface and two sets of relays. It enables motor operation to be adapted to the requirements of workshop workstations and industrial drive systems.