Issue:
Why is the dynamic braking resistor repeatedly failing in our lift application?
Product Line:
Dynamic braking resistors, Altivar 71
Environment:
Lifting applications
Cause:
DBR failure
Resolution:
Generally, the dynamic braking resistors burning or failure happens due to higher braking energy dissipation than it's power rating.
If you select the normal braking resistor part reference provided in the catalog, the power rating of the resistor is insufficient to dissipate the braking energy generated by the motor in during downward movement. Hence it will burn the resistor due to overheating.
The lift is a vertical and cyclic movement application, and the braking power dissipation is similar to hoisting application. Hence it is necessary to select the hoisting resistor part references provided in the ATV71 catalog to avoid DBR failure due to overbraking.
Why is the dynamic braking resistor repeatedly failing in our lift application?
Product Line:
Dynamic braking resistors, Altivar 71
Environment:
Lifting applications
Cause:
DBR failure
Resolution:
Generally, the dynamic braking resistors burning or failure happens due to higher braking energy dissipation than it's power rating.
If you select the normal braking resistor part reference provided in the catalog, the power rating of the resistor is insufficient to dissipate the braking energy generated by the motor in during downward movement. Hence it will burn the resistor due to overheating.
The lift is a vertical and cyclic movement application, and the braking power dissipation is similar to hoisting application. Hence it is necessary to select the hoisting resistor part references provided in the ATV71 catalog to avoid DBR failure due to overbraking.
Released for: Schneider Electric United Arab Emirates
Need help?
Product Selector
Quickly and easily find the right products and accessories for your applications.
Get a Quote
Start your sales enquiry online and an expert will connect with you.
Where to buy?
Easily find the nearest Schneider Electric distributor in your location.
Help Centre
Find support resources for all your needs, in one place.
