The entire operation of the VFD motor starter is controlled by a PLC as the core controller, which continuously monitors parameters such as current and voltage. Together with a touchscreen human-machine interface and adaptive PID algorithms, it enables seamless switching and closed-loop regulation between VFD, soft starter, and mains frequency modes, effectively addressing issues of low reliability in high-voltage motor startup and delayed fault response.

Product features

1. Zero Downtime Operation

Achieves millisecond-level fault detection and switching (<10 ms), ensuring uninterrupted performance in mission-critical applications.
Prevents production interruptions in harsh environments (power generation, mining, chemical processing) through a hardware/software redundant architecture.

2. Space-Saving & Cost-Efficient Design

Compact, integrated engineering reduces the footprint by 10–15% compared with conventional solutions while lowering total system costs by ≥10%.
Eliminates the need for external filtering and PFC components - simplifying installation and reducing wiring complexity and maintenance workload.

3. Industrial-Grade Intelligent Control

Adaptive PID algorithms dynamically optimize responses to load fluctuations; programmable V/F curves support over 15 motor profiles.
Resonance suppression technology prevents mechanical harmonic damage, enabling smooth 0–50 Hz speed ramping with up to 96% peak efficiency.

4. Robust Safety & Compliance

Dual-redundant protection for IGBT and thyristor modules with <1 μs fault response.
The IP30-rated enclosure prevents particulate ingress, while forced-air cooling maintains thermal stability in ambient temperatures up to 55°C.
Globally certified to CE EMC/LVD and GOST-R standards.

5. High-Performance Motor Control

Adjustable current limiting (150–500% FLA) overcomes high-inertia startup challenges in crushers, compressors, and high-voltage motors (>6 kV).
Multi-protocol connectivity with native support for Modbus RTU/TCP, Profibus-DP, and Ethernet/IP ensures seamless PLC/DCS integration.

Technical Differentiation

Capability	Conventional Solutions	This Drive System
Fault Recovery	Seconds-minutes downtime	Zero operational interruption
Starting Performance	Fixed torque curves	Load-adaptive current control
System Footprint	External filters + PFC required	All-in-one architecture
Energy Optimization	88–92% typical efficiency	96% verified efficiency

Energy-saving and Consumption Reduction

According to the load characteristic curve, the energy consumption of fans, pumps, and compressors is directly proportional to the cube of the motor speed. For these types of loads, controlling motor speed is the most effective way to achieve energy savings.
When fluid flow is regulated using throttle valves or dampers, adjusting the motor speed can significantly reduce energy consumption.
By adopting more precise, fast, and flexible motor speed control methods, the overall level of process control can be comprehensively improved.
The VFD motor starter combines the functions of a soft starter, reducing the impact of high starting currents on the power grid (voltage drop). In addition, compared with soft starters, VFDs can provide higher starting torque and lower starting current, resulting in reduced stress on motor windings and improved energy efficiency.
The motor's startup and acceleration processes can be effectively controlled, thereby reducing mechanical stress on the driven load.
Compared with operation at the motor's rated frequency, using a VFD yields a higher input power factor.
VFD energy losses can be as low as 1.5% (excluding transformers).

product-800-394

Primary System Diagram

High-voltage power busbar

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Main technical parameters

Serial number	name	Indicator parameters
1	Topology	Voltage source power unit series multi-level
2	Motor type	Asynchronous motor or synchronous motor
3	Rated power	2000～3150kW
4	Rated voltage	10kV
5	System output voltage range	0～10kV
6	System output frequency range	0～50Hz
7	Rated input voltage/allowable variation range	10kV±10%
8	Rated input frequency/allowable variation range	50Hz±10%
9	Control method	VF/Speed Sensorless Vector Control
10	Overall efficiency	≥96%
11	Power Factor	>0.95, no power factor compensation device required
12	harmonic	Meet the requirements of national standard GB14549, no need to add filtering device
13	Voltage change rate	＜1000 V/ μs
14	Frequency resolution	0.01Hz
15	Rectification form	Diode uncontrolled three-phase bridge rectifier
16	Inverter form	IGBT H-bridge inverter
17	Communication interface	RS485
18	Standard control connections	Hard connection/communication
19	Overload capacity	120%/1min (repeated once every 10 minutes), 150% quick- break protection shutdown
20	Noise level	＜80dB
21	Cooling method	Forced air cooling
22	Operation keyboard	touchscreen
23	Ambient temperature	0～+40℃
24	Protection level	IP30
25	Maintenance method	Front and rear maintenance
26	Altitude	≤1000 meters

VFD motor starter technical parameters

Serial number	name	Indicator parameters
1	AC voltage	10kV AC fluctuation range: -10%~+10%; frequency: 50/60Hz; hardware setting available
2	Insulation voltage	Line voltage 10kV; insulation voltage 42000V
3	Starting overload capacity	Starting overload: 100~800%; running overload 120%
6	Phase sequence	output terminal allows operation in any phase sequence and is wired in positive phase sequence.
7	Transient overvoltage protection	dv/ dt absorption network
8	cool down	Natural cooling
9	Bypass contactor	Vacuum contactor with direct starting capacity
10	Environmental conditions	Low altitude (≤2000 meters); 5%-95% relative humidity
11	trigger	High-frequency dual-fiber triggering and conduction angle compensation enable stepless motor starting
12	Certification standards	CE, Tianjin Tianchuan Institute, Russian GOST
13	Power components	Digitalization of power components enables multi- circuit data acquisition and real-time protection monitoring
14	BOD overvoltage protection	BOD overvoltage trigger protection enables thyristor to turn on quickly
15	Overcurrent protection	100-150% FLA (effective during operation) trip time: 1-20 seconds
16	Output phase loss protection	Trip value: 1-10%; trip time: 1-60 seconds
17	Start timeout	Startup time exceeds 10 to 120 seconds
18	Number of starts per hour	Range: 1-6 starts and stops per hour; intervals of 10 minutes
19	Current limiting multiple	150%～500% adjustable
20	Screen display	Current, voltage, frequency, power, power factor, operation, fault, bypass
21	Acceleration parameters	Starting voltage: 15-80%; ramp time: 1 to 60 seconds
22	Deceleration parameters	Phase loss, SCR trigger protection, RC current protection, over temperature, over current, etc.

Application Areas

Applicable to industrial sectors with high reliability requirements, such as power generation, metallurgy, and chemical processing, as well as scenarios involving high-voltage motor startup impact, centralized energy efficiency management, and delayed emergency switching.

	Power plant Typical applications include wind turbines, compressors, pumped hydro storage plants, induced draft fans, condensate pumps, circulating water pumps, and boiler feedwater pumps.
	Oil, Petrochemicals, Natural gas pipeline transfer pumps, injection pumps, feedwater pumps, submersible oil pumps, circulating water pumps, brine pumps, compressors, booster fans, oil transfer pumps, and electric submersible pumps.
	Coal, Mining scale removal pumps, slurry pumps, slag slurry pumps, clear water pumps, feed pumps, axial flow fans, agitation pumps, kiln fans, transmission systems, dust removal fans, drainage pumps, media pumps, and counter-rotating fans.
	Cement building materials kiln induced draft fans, kiln forced draft fans, kiln tail fans, kiln head fans, medium-temperature fans, coal mill fans, dust removal fans, circulating fans, raw material grinding fans, cement grinding fans, separator fans, and pressure conveying fans.
	Steel and metallurgy blast furnace blowers, induced draft fans, compression fans, air supply fans, feedwater pumps, water supply pumps, descaling pumps, and dust removal fans.
	Municipal water supply Aeration blowers (for heating, water supply, and sewage), induced draft fans, air supply fans, booster pumps, hot water circulation pumps, sewage pumps, clean water pumps, lift pumps, water supply pumps, and reclaimed water pumps.
	Light industry, Chemical industry coal gas blowers, booster pumps, compressors, axial flow pumps, soft water pumps, and water supply pumps.