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VLT 5005 Danfoss

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The Danfoss VLT 5005 is a frequency converter in the VLT 5000 Frequency Converters series, operating on a 3-phase AC input and offering a true power factor of 0.90 at rated load. It supports up to 4 mm² (10 AWG) power and motor cables, and can handle a maximum short-circuit rating of 100,000 A. The unit features a peak starting torque of 180 percent for 0.5 seconds and a speed range in closed loop operation of 1 to 1000 of synchronized speed.

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Product Description:

The VLT 5005 frequency converter is produced by Danfoss within the VLT 5000 Frequency Converters series. It accepts industrial power and produces an adjustable output for controlling standard AC motors in automated conveyors, pump stations, and fan arrays. The converter delivers precise torque and speed regulation without mechanical throttling, allowing integration into process lines that require repeatable acceleration profiles and tight velocity control.

Electrically, the drive operates on three-phase AC power and maintains a true power factor of 0.90 at rated load, limiting the reactive current drawn from the supply. High breakaway loads are accommodated by a starting torque reserve of 160% for one minute, while short bursts can reach 180% for 0.5 seconds to overcome static friction. Output frequency can be adjusted in increments of ±0.003 Hz, and the internal vector processor responds to reference changes within 3 ms. These performance values result in an open-loop speed error of ±7.5 rpm below 1500 rpm and an open-loop speed range of 1:100 relative to synchronous speed, supporting accurate speed or flow control without external feedback devices.

The input has a short-circuit withstand rating of 100,000 A, and the converter can operate at elevations up to 1000 m above sea level. Motor connections may use unshielded cables up to 300 m long or shielded cables up to 150 m long. Conductors for the power and motor terminals must not exceed 4 mm² (10 AWG), helping ensure that the installed wiring fits the available terminals. Closed-loop control with encoder feedback reduces the speed error to ±1.5 rpm below 1500 rpm and extends the regulation range to 1:1000 relative to synchronous speed. The quick-disconnect architecture supports the permitted motor cable sizes while helping keep electromagnetic interference within acceptable limits.

Input Phases
3-phase AC
Max Altitude
1000 m
Max Motor Cable Size
4 mm² (10 AWG)
Max Power Cable Size
4 mm² (10 AWG)
Max Screened Motor Cable
150 m
Max Short-circuit Rating
100,000 A
Max Unscreened Motor Cable
300 m
Output Freq Resolution
±0.003 Hz
Peak Starting Torque
180% for 0.5 sec
Product Type
VLT 5000
Speed Error Closed Loop
±1.5 rpm (<1500 rpm)
Speed Error Open Loop
±7.5 rpm (<1500 rpm)
Speed Range Closed Loop
1:1000 of sync speed
Speed Range Open Loop
1:100 of sync speed
Starting Torque
160% for 1 min
System Response Time
3 msec
True Power Factor
0.90 at rated load

Frequently Asked Questions about VLT 5005:

Q: What type of input phase does the VLT 5005 frequency converter require?

A: The VLT 5005 operates with a 3-phase AC input, making it compatible with standard industrial power supplies.

Q: What is the maximum screened motor cable length supported by the VLT 5005?

A: This model supports a maximum screened motor cable length of 150 meters, allowing flexibility for installations at a distance from the motor.

Q: How much peak starting torque can the VLT 5005 provide?

A: The VLT 5005 delivers a peak starting torque of 180% for 0.5 seconds, enabling robust acceleration of demanding loads.

Q: What is the speed error in closed loop operation for the VLT 5005 when running under 1500 rpm?

A: A speed control error of ±1.5 rpm is maintained in closed loop mode for speeds below 1500 rpm, ensuring precise regulation.

Q: What true power factor does the VLT 5005 achieve at rated load?

A: The true power factor at rated load is 0.90, contributing to efficient energy utilization in the VLT 5005 converter.


Internal Product Review

  • ‘‘The VLT 5005 is a Danfoss frequency converter designed for dependable motor control on 3-phase AC input. Closed-loop performance is especially impressive, with a 1:1000 speed range and ±1.5 rpm speed error below 1500 rpm. A fast 3 msec response time makes the unit a strong choice for precise drive applications.’’

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