ZCTG Series IE5 Super-Premium Efficiency Rib-Cooled High-Voltage Permanent Magnet Synchronous Motor

ZCTG Series IE5 Super-Premium Efficiency Rib-Cooled High-Voltage Permanent Magnet Synchronous Motor

The ZCTG Series innovatively applies rib-cooling technology to the field of the high-voltage permanent magnet variable frequency drives. By scientifically arranged at the external cooling ribs and optimized at the aerodynamic airflow channels, it significantly enhances the natural convection cooling efficiency. Rated at voltages covering 6kV and 10kV and the power ranging of 280-5000 kW, this series is particularly suitable for variable frequency speed control applications with strictly requirements at the installation space and the heat dissipation conditions. By integrating the high-performance permanent magnet materials, the advanced electromagnetic design and the specialized insulation system, this motor achieves GB30254 Grade 1 (IE5) Energy Efficiency while notably the reducing equipment footprint and the system complexity.

The ZCTG Series combines the innovative rib-cooling technology with the high-voltage permanent magnet synchronous design, perfectly integrating the ultra-high efficiency and the compact construction for the high-voltage variable frequency drive applications. This product is ideally suited for the high-power variable frequency drive requirements in the industries such as the power generation, metallurgy and the mining, offering one optimal solution for both the energy savings and the space optimization

Key Features

The ZCTG Series innovatively integrates rib-cooling technology with high-voltage permanent magnet synchronous design, achieving Grade 1 energy efficiency and highly effective natural cooling. With rated voltages of 6kV and 10kV, and a power range of 280-5000 kW, it features a compact structure that saves approximately 20% of installation space. The motor supports wide-frequency, high-voltage variable speed operation from 10 to 100 Hz, delivering excellent low-frequency torque characteristics and seamless compatibility with mainstream high-voltage variable frequency drives (VFDs). It is ideally suited for industrial VFD applications with strict space and energy efficiency requirements.
High-Efficiency Rib-Cooled PMSM Technology:​ The combination of rib-cooling and permanent magnet synchronous design achieves the GB30254 Grade 1 (IE5) energy efficiency standard, offering 15%-30% energy savings compared to traditional high-voltage motors for outstanding overall efficiency.
Compact Space-Saving Design:​ The optimized rib-cooled structure reduces volume by approximately 20% and weight by about 15% compared to traditional high-voltage motors, significantly saving on installation and transportation space.
Wide-Frequency & High-Voltage Adaptability:​ Supports high-voltage variable frequency operation from 10 to 100 Hz, featuring excellent low-frequency torque, a wide speed range, and smooth operation to suit various load requirements.
Intelligent VFD Compatibility:​ Offers seamless compatibility with mainstream high-voltage VFDs, supports multiple control strategies, and enables simple system integration for easy connection to existing high-voltage VFD control systems.
High Reliability in Operation:​ Utilizes a Class H insulation system processed with Vacuum Pressure Impregnation (VPI) and incorporates shaft current suppression design, ensuring long-term stable and reliable performance under high-voltage VFD conditions.

Technical Specifications

Power Range:​ Covering 280 kW to 5,000 kW, the ZCTG Series employs a modular design with logical power gradation to meet the drive requirements of industrial equipment across various scales. With a wide power range suitable for large-scale equipment such as fans, pumps, and compressors, it facilitates precise selection based on actual load demands.
Rated Voltage:​ Supports two industrial high-voltage levels: 6 kV and 10 kV. Compliant with mainstream domestic and international power supply standards, it can be directly connected to existing high-voltage grids without additional step-up equipment. The flexible voltage selection allows easy matching to on-site power conditions, reducing system modification costs.
Efficiency Class:​ Fully meets the GB30254 Grade 1 energy efficiency standard (IE5 Super-Premium Efficiency). Utilizing high-performance rare-earth permanent magnet materials and an optimized electromagnetic design, it maintains ultra-high efficiency across a wide frequency range. Compared to traditional high-voltage asynchronous motors, it delivers significant comprehensive efficiency improvement, achieving 15% to 30% energy savings.
Power Factor:​ Features an adjustable rated power factor from 0.96 to 1.0, offering excellent grid compatibility and significantly reducing system reactive power loss. Through optimized variable frequency control, the power factor can automatically adjust according to load conditions, minimizing the need for reactive power compensation devices.
Protection Level:​ Designed with an IP54-rated totally enclosed protective structure, effectively preventing ingress of dust and water jets. Suitable for harsh industrial environments like metallurgy, mining, and chemical processing. The welded steel plate housing provides high structural strength and excellent sealing, ensuring long-term reliable operation under complex working conditions.

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Motor Selection Guide and FAQ

Motor Selection Guide
1. Define Basic Parameters
Power & Speed:​ 
Determine the required rated power based on load characteristics and define the motor pole count and speed range according to your equipment’s operational speed.
Voltage & Frequency:​
Confirm your power supply standard (e.g., 380V/50Hz, 480V/60Hz). Custom designs are available for special voltage requirements.
Mounting Type:​
Specify IEC standard mounting (e.g., B3, B5, B14). Custom the flanges & bases are also supported.
2. Consider Operating Environment
Protection Rating (IP):​
IP55 for standard environments. IP65 is recommended for damp or dusty conditions. Hazardous areas require Ex D/Ex E certifications.
Insulation Class:​
Class F (155°C) for general use. Class H (180°C) insulation is advised for high-temperature environments.
Cooling Method:​
Self-ventilated (IC411) for standard applications. Forced air or water cooling is available for enclosed spaces or high-power-density scenarios.
3. Match Load Characteristics
Starting Torque:​
Consider starting torque for fan/pump loads. Verify locked-rotor torque for conveying equipment.
Duty Cycle:​
Standard motors are suitable for continuous operation (S1). Frequent start-stop cycles (S5) require reinforced bearings and insulation.
Efficiency Requirement:​
Select IE3/IE4/IE5 efficiency classes based on annual operating hours. Ultra-premium efficiency (IE5) motors offer the lowest total cost of ownership for long-running applications.
Get Your Custom Solution & Fast Quote. Our Engineers Are Ready to Help.
Contact Us for the Precise Solution
Provide your equipment parameters, load profile, environmental conditions, and application details.
Receive the complimentary motor selection calculation, the energy efficiency analysis report, and the 3D model.
We support sample testing and operational simulation for validation.

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