Triol
AT27

Medium-voltage drives for critical industrial infrastructure.

Advanced 4-Quadrant Vector Control

Enables precise, bidirectional motor control for superior performance in high-inertia applications like elevators and conveyors, supporting induction, synchronous, and permanent magnet motors (PMM).

From Arctic Cold to Desert Heat

Standard operating range from –10 °C up to +50 °C, with factory options down to –60 °C and up to +55 °C.

Modular & Service-Friendly Design

Features independently removable power cells and front-only access. A faulty cell is swapped in under 30 minutes without special tools, maintenance is performed from the front, and one universal spare cell covers the full range from 300 kW to 10 MW and 3–13.8 kV.

AT27 MV

The AT27 MV is a rugged, medium voltage drive engineered for extreme indoor and outdoor conditions, including dusty environments and varying climates (-40°C to 60°C). It features minimal maintenance, built-in safety components, and operates without external HVAC or air filters, controlling induction, synchronous, and PMM motors efficiently.

Power:	Up to 11 kV input; up to 8 MW output (scalable with cell configurations).
Integration:	Compatible with induction/synchronous/PMM motors; integrates with CB27 switching/filter cabinets; supports remote control via RC27; multi-level topology for clean power.
Benefits:	High operational reliability and productivity; reduced costs through innovative cooling and algorithms; seamless integration for fast setup; suitable for all conditions with minimal downtime.

AT27 DD

The AT27 DD is designed for reliable outdoor industrial use in harsh, humid, or dusty conditions, including tropical climates and areas with unstable power or diesel generators. It features a robust, NEMA3R (IP54) compliant enclosure, optimized cooling, and advanced protection against condensation, dust, and moisture.

Power:	Up to 11kV input; up to 8MW output (modular power cells).
Integration:	integrates directly into any existing PLC/SCADA system via Modbus RTU/TCP, Profibus DP and Ethernet/IP, while its built-in phase-shifting transformer delivering THDi < 5 % and full IEEE 519 compliance without external filters or extra add-ons.
Benefits:	Proven architecture for stable performance; ease of use with minimal maintenance; balanced value without excess complexity; enhanced safety and longevity in harsh conditions.

AT27 ED-RG

The AT27 ED-RG is a versatile and reliable medium voltage industrial drive designed for heavy-duty industrial loads such as conveyors, elevators, and mills, ensuring seamless integration and robust, energy-efficient performance. It boasts high reliability and minimal maintenance, minimizing downtime. Key features include automatic fan speed adjustments for enhanced safety and reduced noise, and an integrated regenerative braking system that feeds excess energy back into the grid, significantly cutting operational costs.

Power:	Up to 13.8 kV input; up to 12.5 MW output.
Integration:	Wi-Fi diagnostics; automatic fan speed control; integrated sine filters; NEMA2 enclosures; energy recovery modules.
Benefits:	Returns excess energy back to the grid, reducing power costs and improving efficiency. Engineered for dynamic systems with frequent braking or variable torque loads.

AT27 RD

The AT27 RD is a cost-effective two-quadrant, multi-level VFD for general-purpose industrial tasks, delivering clean power with low harmonics for pumps, fans, and mixers where simplicity and compliance are key.

Power:	Up to 14kV input; up to 9.1 MW output
Integration:	Built-in phase-shifting transformer for IEEE 519 compliance; no external filters needed; color touchscreen; basic vector control.
Benefits:	Full harmonic compliance without add-ons; fast integration and dependable performance; minimal maintenance for value-driven setups; ideal for clean, efficient power in standard environments.

Built through partnership. Proven by engineering. Trusted in the toughest conditions. Full-cycle production. Total reliability. Systems that perform where others fall short.