VFD Cable

VFD Cable
  • Cable Type: RFOU-VFD
  • Voltage: 0.6/1kV, 1.8/3kV
  • Shielded VFD Cable
  • Approval: ABS, DNV GL

What is VFD cable? VFD cable applies to VFD power cable on offshore units and intended for fixed installation.

Why use VFD cable? VFD cable has outstanding electromagnetic compatibility.

The high-density shield and the compound shield design enable the shield VFD cable with good anti-electromagnetic interference.

Flame retardant cable type is RFOU-VFD and fire resistant cable type is BFOU-VFD.

Both types are produced by low smoke and halogen free thermosetting compound, so they feature low smoke, halogen free and flame retardant. (Mud resistant as requested).

Size/mm²Min Diameter/mmMax Diameter/mmWeight (kgs/km)

Conductor: Stranded tinned copper wire, IEC60228, Class 2 or 5

Insulation: PR (TFOU-VFD type is XLPE insulation)

Screen: copper polyester tape +TCWB

Inner Sheath: Halogen free compound

Armor: Tinned copper wire braid

Outer Sheath: Halogen free thermoset compound SHF2 (SHF MUD as request)

Sheath Color: Black color

Core Identification

3 cores: off-white, black, red

Earth wire: yellow/green

Honest: Your Professional VFD Cable Manufacturer & Supplier

RFOU-VFD is tinned copper wire conductor, EPR insulation, copper polyester tape screen, halogen-free compound inner sheath, tinned copper wire braided armor and halogen-free thermosetting compound SHF2 or SHF Mud outer sheathed.

It is flame retardant, low smoke, halogen free and mud resistant as a request.

Type BFOU-VFD is with fireproof mica tape around the copper wire conductor.

Moreover, if you need XLPE insulation VFD power cable, we can produce cable type TFOU-VFD.

When you want to buy VFD cables at a good price, we will be your reliable VFD cable manufacturer based in China.

Our VFD cable types are approved by CCS, ABS, and DNV GL classification societies.

VFD Cable Standards

NEK606/2009, IEC60332-1-2, IEC60332-3-22 Cat A, IEC60754-1/2, IEC61034-1/2,

IEC 60092-350, 351, 352, 353, 359.

VFD Cable Specification

Core Number: 3, 3+3E

Core Size:10mm²,16mm², 25mm², 35mm², 50mm², 70mm², 95mm², 120mm², 150mm², 185mm².

Sheath Printing

Manufacturer    Type       Size      Voltage    IEC 60332-3-22      Year   Meter

VFD Cable: The Ultimate FAQ Guide

1. What is a VFD Cable?

Variable frequency drive cables are types of connectors that you can use to connect the VFD controllers.

The variable frequency controller varies the voltage and frequency of signals to control the speed of motors.

The VFD cable is capable of handling harsh electrical environmental conditions which standard cables are unable to handle.

2. What is VFD Cable Structure?

 VFD Cable Structure

VFD Cable structure

A VFD cable structure consists of the following:

  • Conductor which is usually stranded aluminum or copper
  • Conductor screen to maintain a uniform electric field thus minimizing electrostatic stress
  • Insulation to prevent the leakage of currents for safety of the user
  • Insulation Screen that screens to maintain a uniform electric field to minimize electrostatic stress
  • Conductor Sheath acts as a shield that keeps electromagnetic radiation intact.
  • Filler such as soft polymer materials for proper insulation
  • Jacket that protects the inner parts from any damage and interference.

3. Can VFD Cables withstand High Voltage Spikes?

Yes, VFD cables are capable of withstanding high voltage spikes which is not possible with the standard cables.

It will experience high voltage spikes in normal operations due to high frequency switching technology.

The structural composition of the VFD cable allows it to withstand the high voltage spikes thus increasing the efficiency.

4. What are VFD Cables used for?

VFD marine cables are used to power different types of AC motors in industrial commercial pumping, motion control, and extrusion applications.

The cables assist in the transmission of power through the VFD drives so that it may perform the above functions.

VFD Marine cable

VFD Marine cable

5. Why Use VFD Cable for Motor Drives?

You should consider using a VFD cable for motors because it can withstand high voltage spikes under normal operating conditions.

High voltage spikes can exceed voltage rating of the VFD cable thus resulting into a reduction of reliability and longevity.

Apart from that you can use the VFD cables because of the following advantages:

  • An improvement in the control of most of the processes
  • Reduction in wastage in the manufacturing process
  • Long and useful life of the machines especially the motors
  • Higher efficiency thus boosting the reliability.
  • Less wear and tear of the components leading to very low costs of maintenance.
  • VFD cables are flame retardant, halogen free, low smoke and resistant to mud.

6. What are the Benefits of Using VFD Cable?

You will experience the following benefits while you are using the VFD cable:

  • An improvement in control in motor speed within 0.1% tolerance thus facilitating more complex processes.
  • It increases the efficiencies of the VFD machines thus reducing the cost of energy.
  • It enables the VFD motor to have a smooth start thus reducing early motor fatigue and eventual failure.
  • It enables the VFD machine to operate quietly as it is capable of withstanding high voltage spikes.

7. How can you Ground VFD Cables?

You can ground VFD cables by going through the following procedure.

First, you will connect the VFD cable to the VFD enclosure and the motor grounded frame.

After that, you will run a grounding conductor that connects the VFD ground to the motor ground inside the conduit.

In many grounding connections, a shield is often the better option over the VFD cables.

In this case, we are going to use the VFD cable instead of the shield.

You will then connect the VFD cable to the ground bus of the drive.

You will terminate the motor end to the ground motor thus leading to the grounding of the VFD cable.

8. What are the Characteristics of VFD Cables?

VFD cables have the following characteristics:

  • Shielding

High performance VFD cables have dual copper plates or braided shield construction.

  • Insulation

XLPE is the best form of insulation for VFD cables thus prompting better performance of the VFD cables.

  • Grounding

At ground potential, insulated grounds, drains and shield are equivalents to three or more conductors

  • Stranding

It has tinned copper conductors, high flex as well as high strand count.

  • Certification

You will get a recommendation from the VFD cable manufacturer.

9. Do you need EMC Filter in VFD Cables?

VFD Marine cable

 VFD Marine cable

Yes, you will need to have an EMC filter in VFD cables.

You will need an EMC filter to limit conduced electromagnetic interferences to a level that is on the EMC plan.

10. What causes VFD Cables to Fail?

VFD cables can fail due to a number of reasons among them being:

  • Interferences from other VFD cables as one may fail due to disturbance or noise from other VFD cables.
  • Voltage spikes have also been the main contributors to VFD cable failure.

11. How does VFD Cable Compare to Standard Cables?

VFD cables are the best cables that you can use in applications that experience voltage spikes.

The construction of VFD cables allows it to withstand harsh environments such as voltage spikes.

Standard cables on the other hand can work well in applications that are not too demanding.

This limits its ability to function in harsh conditions such as applications with voltage spikes.

12. Why is VFD Cable Termination Critical?

VFD cable termination is a connection of the cable to VFD devices and allowing for further connections to other devices.

VFD cable termination is critical because it allows the VFD system to distribute the signal or current to other points.

It acts as the junction where distribution of power and signals occur.

13. What is the Service Lifespan of VFD Cable?

The service lifespan of VFD cables is approximately 7 to 12 years.

There are too many factors at play that would affect the lifespan of the VFD cables.

VFD cables just like any other form of technology has finite lifespan and at 7 years you might experience difficulties.

14. How does VFD Cable Prevent Premature Equipment Failure?

VFD cable prevent premature equipment failure by offering proper shielding that reduces the RFI/EMI noise.

Apart from that it provides a low impedance signal return path that prevents stray voltage that causes equipment failure.

15. What are the Disadvantages of VFD Cable?

You may encounter the following disadvantages by using the VFD cables:

  • Purchasing VFD cables is difficult because they do not have standards for differentiations.

It is difficult to determine the minimum grade and high performing grade VFD cables.

  • Operations of the VFD system often produce a lot of electrical noise such as voltage spikes, and radio frequency noise.
  • You might experience failure of the motor bearings and controllers.
  • The cable might also fail because of corona damage.

16. Are there Quality Standards or Approvals for VFD Cables?

Yes, there are quality standards that the VFD cables have to adhere to for approval.

The main quality standards to adhere to include:

  • ISO quality standards
  • CE quality standards
  • NFPA quality standards

17. How do you Specify VFD Cable?

Whenever you are looking for a good VFD cable, you should look at the following specifications:

  • Ample grounding termination and configuration

You should consider going for a VFD cable that has more copper at ground potential thus reducing noise related issues.

  • Proper shielding for noise containment

You should go for shielding systems with dual copper tapes or combination braid types for proper noise containment.

  • Sturdy insulations for proper electrical performances

You should go for a proper insulation system that allow long cable runs, protects the motor and increases the efficiency.

  • Industrial hardening

This involves going for a VFD cable that can withstand harsh environmental conditions thus increasing the durability.

  • Appropriate stranding

Proper stranding will provide better resistance to corrosion thus making tinned copper the best option over copper strands.

  • Manufacturer recommendations

You should use a VFD cable which the manufacturer recommends for you to use.

18. Why is VFD Cable Important in Automated Systems?

VDF Cables for marine use

VFD Cable for marine use

VFD cables are important in automated systems because it assists in the transmission of power for regulation of speed.

It assists in the regulation of speed for 3 phase AC electrical motors by controlling the voltage and frequency of power.

It provides the ability of saving substantial amount of energy during the automation processes.

Apart from that, it is capable of:

  • Maintaining torque at particular levels which can match the load.
  • Improving process controls
  • Reducing mechanical stress by providing a soft start on 3 phase induction motors.
  • Improving the power factor of the electrical system.

19. Is VFD Cable Immune to Electrical Disturbance (Noise)?

No, VFD cables are not immune to electrical disturbances.

However, VFD cables have structural advantages which can withstand and reduce electrical disturbances.

20. Which Industries use VFD Cables?

You can use the VFD cables in different industries such as:

  • Manufacturing industry to reduce the excess consumption of power
  • Commercial flow or pumping industries
  • Extrusion industrial applications

21. Are Adjustable Speed Drive Cables same as VFD Cables?

Yes, adjustable speed drive cables are the same as VFD cables.

Over the years, VFD cables have gone through an evolution to a point where they are adjustable speed rive cables.

You can adjust it to control speed of AC motor and torque by varying the motor input voltage and frequency.

22. How does VFD Cable Ensure Power Efficiency?

VFD cables ensure power efficiency by going through the following processes.

  • Installing or specifying input line reactors

Line reactors will reduce input line distortions that come as result of non-linear drive characteristics.

It will limit the current inrush to the rectifier thus reducing the peak currents and rounding the wave forms.

  • Specifying or installing shaft grounding rings

It assists in diverting harmful shaft voltages to the ground thus extending the life of the machine bearings.

  • Installation of an output filter for longer motor lead lengths

You can introduce a filter that will capture reflected waves and transient voltage stresses thus increasing the efficiency of power.


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