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We are fast where others are slow, flexible where others are rigid, and committed where others are distant.
We are fast where others are slow, flexible where others are rigid, and committed where others are distant.
Engineered for the Elements: Perfect for Tropical, Equatorial, and Dusty Climates.
Efficiency
≥97%
Input power factor (cosφ)
0.96
Input harmonic distortion (THDi)
<5%
Enclosure protection
NEMA 3R (IP54)

Discover the engineering advantages that set the AT27 DD apart - and keep your operations running at peak performance.

The VFD offers versatile motor control functionality and is compatible with Induction, Synchronous (with external exciter), and Permanent Magnet Motors (PMM). Furthermore, it utilizes multi-level Pulse Width Modulation (PWM) to provide a "pure sine" output waveform, meaning no additional output filters are required.
The AT27 DD features an enclosure type of NEMA 3R (IP54) and is suitable for indoor or outdoor installation. It is specifically designed for humid and/or dusty industrial locations where conductive dust is not present.
NEMA 3R (IP54)
The drive can operate reliably in a temperature range of +1 °C to +40 °C (34 °F to 104 °F), and can operate up to +50 °C (122 °F) with reduced power.
A precisely engineered, versatile, and reliable solution that requires no additional construction or HVAC system, only minimal mounting and connection of input and output power cables.
Featuring a welded frame, door seals, and separated compartments for power and cooling components, the design includes anti-condensation heating, labyrinth air passages, and filters to protect against dust and moisture.

Equipped with a grounding switch for safe maintenance and surge protection to guard against lightning and over-voltage.

The AT27 DD achieves a high VFD efficiency of ≥97%. It maintains excellent power quality, with a high power factor of 0.96 and low input current harmonic distortion (THDi <5%).

Look inside the AT27 DD to see how smart design becomes real-world performance, efficiency, and uptime.

Output current range (Rated)
21...600 A
Operating temperature
+1 °C...+40 °C (34 °F...104 °F) (up to +50 °C with reduced power)
Output frequency range
From 0.5 up to 120 Hz
Output voltage harmonic distortion (THDu)
<5%
Input voltage (rated)
3.3; 4.16; 6; 6.6; 10; 11 kV
Noise level @ 1 m distance
<79 dB(A)
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Built through partnership. Proven by engineering. Trusted in the toughest conditions. Full-cycle production. Total reliability. Systems that perform where others fall short.
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