VLT 6000 Danfoss
Wake Industrial LLC is not an authorized distributor of this product.
The Danfoss VLT 6000 is part of the VLT 6000 HVAC Drives series and is designed for precise speed control with an output frequency resolution of ±0.003 Hz. This HVAC drive features 8 programmable digital inputs, 2 relay outputs, and supports an analog input accuracy of 1 percent of full scale. It delivers 110 percent starting torque for one minute and can operate at altitudes up to 1000 meters.
Internal Product Review
The VLT 6000 is a Danfoss HVAC drive that feels well-tuned for dependable building automation service. Fast 3 msec system response and +/-0.003 Hz output frequency resolution support precise fan and pump control. Starting torque of 110% for 1 min. and break-away torque of 160% for 0.5 sec. give this drive strong low-speed authority, making it an excellent HVAC platform.
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Product Description:
The VLT 6000 variable frequency drive is produced by Danfoss as part of the VLT 6000 HVAC Drives series. This HVAC drive regulates induction motor speed for supply and exhaust fans, pumps, and cooling towers used in building management systems. By converting fixed mains voltage to a modulated output, it supplies controlled torque, assists energy management strategies, and links directly to building automation controllers through its analog and digital interfaces.
Eight programmable digital inputs accept remote start, stop, and mode commands; their input impedance is 2 kΩ, and they tolerate up to 28 V DC on each channel. Command resolution on the analog side reaches 10-bit plus sign, and the converter maintains 1% full-scale accuracy, while the drive’s 8-bit analog output returns process feedback. The inverter can adjust motor frequency in ±0.003 Hz steps, allowing precise fan balancing. During acceleration, it delivers 100% rated torque, and its control algorithm supports 110% starting torque for one minute to overcome static loads. A continuous overload capability of 110% accommodates transient pressure spikes without stalling the connected motor. These control capabilities allow the drive to respond to changing airflow and pressure demands across connected HVAC equipment.
The power section is rated for a maximum short-circuit current of 100,000 A, enabling use on high-capacity distribution networks. Control feedback is refreshed within 3 ms, so airflow corrections follow sensor changes almost instantly. For locked-rotor situations, the drive supplies a breakaway torque of 160% for 0.5 seconds, freeing jammed dampers before reverting to normal operation. At rated load, the true displacement power factor is 0.90, helping maintain utility compliance. Installation is permitted at altitudes up to 1,000 m without derating. Two onboard relays provide dry-contact status signals to fire panels or supervisory controllers.
