Braking resistors are used to dissipate excess energy in overhauling VFD applications. KEB high-performance resistors are offered in a variety of sizes and configurations along with intrinsically safe types.
Braking Resistors for VFD Applications
Braking Resistors
Product Details
Voltage – KEB offers several different types of braking resistors in both 230V and 460V classes.
Design types include – backmount, encapsulated, and wirewound brake resistors. What does backmount design mean? We offer brake resistors that can be mounted behind the drive. This allows for a very compact and small drive footprint.
Looking for quality? KEB dynamic braking resistors are UL recognized, certifying its design quality.
Intrinsically Safe – We also offer a line of intrinsically safe brake resistors for added protection. That means they are designed to fail safely rather than potentially catching fire.
Tech Specs
Electrical
• Voltage Class – 230 and 400V
• Up to 26kW continuous (440kW 6 second duty)
• Intrinsically Safe – Optional
Mechanical
• Type: Encapsulated and Wire wound
• Protection: IP20 standard (IP60 optional)
Certifications
• CE and UL recognized
Options
• Intrinsically Safe Resistors
VFD Braking Resistors for Industrial Applications
Key Benefits
Braking resistors are used in VFDs to dissipate excess energy generated by the motor, allowing the drive to safely and effectively brake the load. Braking resistors are often the simplest, cost-effective solution in applications requiring fast deceleration.
Many will choose a braking resistor for applications where the motor speed exceeds the VFD's set speed.
The benefits of braking resistors for VFD systems include:
• Safety
• Efficiency
• Control
• Voltage stability
• Dependable performance
Braking resistors provide more precise, controlled braking to prevent hardware damage and nuisance faults in the VFD.
Capabilities
KEB brake resistors’ capabilities include:
• Absorb regenerative energy
• DC bus over-voltage protection
• Converts energy to heat
• Enables controlled deceleration
• Superior to mechanical brakes
Brake resistors bring several advantages over traditional friction braking. These advantages include faster motor braking, reduced component wear, and lower risk of mechanical braking failure.
Industry Applications
Common applications for braking resistors include:
• Elevators
• Cranes
• Lifts
• Wind turbines
For elevator applications, a dynamic braking resistor takes on the entire load current, dissipating this power as heat to effectively decelerate the elevator.
Speed control is also key for material handling applications. In these applications, braking resistors ensure smooth operation of cranes and other load-bearing equipment.
In the context of wind power, braking resistors for VFD systems absorb excess voltage created by wind turbine motors. This creates a braking effect while protecting the electrical drive system by converting this surplus energy into heat.
Additional Features
KEB provides a variety of additional features to support your unique industrial application. That includes drives with back-mounted brake resistors to minimize drive footprint. We also offer encapsulated and wire-wound braking resistors, which are UL-recognized and support system performance through safe, efficient braking.
We also offer free software for VFD configurations. Our team can help you select the ideal braking solution for your application needs and goals.
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