6600 Volt Medium-Voltage Electric Motors
6600-volt electric motors (6.6 kV) deliver the highest levels of power and reliability in the medium-voltage class — built for large-scale industrial plants, utilities, and infrastructure systems that demand continuous, efficient performance at thousands of horsepower.
These motors are designed for heavy process loads, long duty cycles, and harsh environmental conditions.
Available in TEWAC (Totally Enclosed Water-to-Air Cooled), TEAAC (Totally Enclosed Air-to-Air Cooled), and Weather-Protected (WPII) configurations, all models meet or exceed NEMA MG-1, IEEE 841, and API 541 standards.
Typical Specifications
Specification Range / Detail
Voltage 6600 V AC (6.6 kV)
Horsepower Range 500 – 5000 HP +
Speed (RPM) 900 / 1200 / 1800
Enclosures TEWAC / TEAAC / WPII / TEXP
Mounting Options Horizontal / Vertical P-Base
Frame Sizes 5000 Frame and larger
Cooling Systems IC81W (TEWAC) / IC611 (TEAAC) / IC01 (Open)
Frequency 60 Hz (Standard) / 50 Hz Optional
Standards NEMA MG-1 / CSA C390 / IEEE 841 / API 541 / IEC 60034
Advantages of 6600 V Motors
Massive Power Output Supports loads exceeding 5000 HP with exceptional torque stability.
Ultra-Low Current Draw High voltage minimizes conductor size and thermal loss.
Energy Efficiency Meets IE4+ equivalent efficiency levels in continuous duty.
VFD Integration Compatible with medium-voltage drives and soft starters.
Long-Range Reliability Built for uninterrupted 24/7 operation in remote installations.
These features make 6600 V motors indispensable for process-critical industrial systems where downtime is unacceptable.
Enclosure & Cooling Options
Typical Applications
Utility generation and distribution systems
High-pressure process and pipeline pumps
Industrial fans, compressors, and blowers
Mining and mineral processing drives
Steel mills and cement plants
Desalination and water-treatment facilities
6600 V motors provide stable, efficient operation under extreme load conditions, supporting multi-megawatt mechanical systems.
Performance and Design Features
Each 6.6 kV motor is engineered with:
Class H insulation systems with partial-discharge control
VPI (Vacuum Pressure Impregnated) windings for extended lifespan
RTD and thermistor monitoring for real-time protection
Insulated bearings and shaft grounding for VFD compatibility
Precision dynamic balancing to ISO 10816 vibration standards
API 541-compliant testing for critical process reliability
4160 V vs 6600 V Motors
Request a Quote or Spec Sheet
Looking for a 6600 V medium-voltage motor for your plant, mine, or power facility?
Our engineering team can assist with motor sizing, cooling system selection, and drive compatibility to ensure a seamless installation.
Request a Quote or Request Spec Sheet for detailed specifications and project pricing.