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When electric motor-driven machinery is stopped energy is created, which can be regenerated into the drive system through the motor itself acting as a generator. This braking energy needs either to be put back into the power supply or dissipated as heat. An external braking resistor provides a
compact, cost effective method of controlling the braking and dissipating the excess energy produced.
Cressall manufactures DBRs for any application, with power ratings from a few watts up to many megawatts and with any duty cycle.
Standard Dynamic Braking Resistors
Continuous powers up to 25kW, braking power up to 250kW
Cressall ES and DBR range of high capacity DBRs for regenerative braking are low cost, easy to specify, quick to install and with ratings to suit most commonly supplied inverter drives.
Units can be supplied either from stock (in the UK from our distributor CP Automation) or can be manufactured within a few days.
Continuous Powers to 100kW, braking power up to 1MW
Cressall SD and HPR DBRs are suitable for continuous powers to 100kW. They are manufactured to order but built to a standard design and can be supplied in a few weeks. Enclosure degree of protection can be IP20 or 23; materials are usually 304 or 316-grade stainless steel, but can be painted or galvanized mild steel if required.
Specialist dynamic braking resistors
For continuous powers of more than 100kW, for medium/high voltage use, with fan or water cooling or for use in specialist applications such as marine, mining etc we can design custom resistors to your specification. Previous designs include:
Specialist advice
Just call us on 0116 273 3633, or contact one of our distributors
Custom Braking Resistors • Calculating Brake Resistor sizes • Standard Braking Resistors
Downloads: DBR installation instructions • ES series Data Sheet • HP Data Sheet
Cressall Resistors Ltd, Evington Valley Road, Leicester, LE5 5LZ U.K. Tel: (+44) (0)116 273 3633