ZCTK Series IE5 Super-Premium Efficiency Air-Air Cooled High-Voltage Permanent Magnet Motors

ZCTK Series IE5 Super-Premium Efficiency Air-Air Cooled High-Voltage Permanent Magnet Motors

The ZCTK Series permanent magnet synchronous variable frequency high-voltage motors feature at fully enclosed, closed air-circuit air-cooled (CACA) design. This series integrates the permanent magnet synchronous technology with the demands of the high-voltage variable frequency drives, enabling the highly efficient and the stable operation at 6kV and 10kV. Covering the power ranging of 315-6000 kW, it comprehensively meets the high-voltage variable speed requirements of the large-scale equipment in the industries such as the metallurgy, the power generation and the petrochemicals. Utilizing the high-performance of the permanent magnet materials and the advanced electro-magnetic design, along with the enhanced insulation system and the dedicated cooling structure for VFD applications, this product achieves IE5 Efficiency while offering the excellent dust & moisture protection and the long-term operational reliability. It represents the highly energy-efficient solution for high-voltage and high-power variable frequency power system applications

The ZCTK Series integrates the high efficiency of the permanent magnet synchronous technology with the high reliability of the CACA (Closed Air-Circuit Air-Cooled) enclosure. Specifically engineered for the high-voltage variable frequency drive systems, this series is ideal for the high-power equipment such as large fans, pumps and compressors, achieving exceptional energy savings and operational stability under high-voltage VFD conditions

Key Features

The ZCTK Series utilizes a fully enclosed, closed air-circuit air-cooled (CACA) enclosure design, integrating permanent magnet synchronous technology with the demands of high-voltage variable frequency drives for highly efficient and stable operation at 6kV and 10kV. Covering a power range of 315-6000 kW, this series comprehensively meets the high-voltage variable speed requirements of large-scale equipment in industries such as metallurgy, power generation, and petrochemicals. It employs high-performance permanent magnet materials, advanced electromagnetic design, an enhanced insulation system, and a dedicated VFD-optimized cooling structure. Achieving IE5 efficiency, it also provides excellent protection against dust and moisture alongside long-term operational reliability, offering a highly energy-efficient solution for high-voltage, high-power variable frequency drive applications.
High-Voltage PMSM & Premium Efficiency:​ Utilizes high-voltage permanent magnet synchronous technology to achieve the GB 30254 Grade 1 (IE5) efficiency standard. It delivers significant improvements in overall efficiency under VFD operation, saving 15%-30% energy compared to traditional high-voltage asynchronous motors.
Sealed CACA Enclosure Protection:​ The closed-circuit air cooling system effectively isolates dust and moisture, making it suitable for harsh industrial environments. With IP54/IP55 protection, it meets the demanding requirements of applications in metallurgy, mining, and chemical processing.
Stable Wide-Frequency Operation:​ Supports high-voltage variable speed control from 10 to 100 Hz. It offers high torque at low frequencies, a wide speed range, and smooth operation, making it particularly suitable for variable speed applications such as fans, pumps, and compressors.
Intelligent Control Compatibility:​ Demonstrates excellent compatibility with mainstream high-voltage variable frequency drives (VFDs), supporting multiple control modes for easy system integration and quick connection to existing high-voltage VFD control systems.
High-Reliability Design:​ Features a Class H/C insulation system processed with Vacuum Pressure Impregnation (VPI). Equipped with shaft current suppression technology and VFD-duty bearings, it effectively withstands high-frequency voltage pulses, extends bearing life, and ensures reliable operation under long-term VFD conditions.

Technical Specifications

Power Range:​ The ZCTK Series covers a power range from 315 kW to 6,000 kW. Its modular design meets the high-voltage variable frequency drive requirements of large-scale equipment such as fans, pumps, and compressors, enabling precise selection and eliminating power waste.
Rated Voltage:​ Supports two high-voltage levels: 6 kV and 10 kV. It can be directly connected to industrial high-voltage grids without requiring additional step-up equipment, reducing system retrofit costs and seamlessly integrating with existing power supply systems.
Efficiency Class:​ Fully complies with the GB30254 Grade 1 energy efficiency standard (IE5 Super-Premium Efficiency). Utilizing high-performance rare-earth permanent magnet materials, it maintains ultra-high efficiency across a wide frequency range, delivering significant energy savings compared to traditional high-voltage asynchronous motors.
Power Factor:​ The adjustable power factor of 0.95 to 1.0 offers excellent grid compatibility. This significantly reduces system reactive power losses, minimizes the need for reactive power compensation, and enhances the stability of the power supply system.
Protection Level:​ Features an IP55-rated Totally Enclosed structure that effectively prevents the ingress of dust and water jets. The welded steel plate construction provides durability suitable for harsh industrial environments like metallurgy and mining.

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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.
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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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