These dynamic braking resistors from Danotherm are insulated and can easily be mounted in compact constructions. The nominal load can be improved by forced air cooling or by mounting the resistors on a heat sink.
For higher ohmic values, the resistor elements are wirewound on mica support sheets. Lower ohmic values are made with helix wound elements with ceramic support. The outer housing is an aluminium profile insulated with micanite sheets on all inner surfaces. The resistor elements are fixed symmetrically in the profile by the mica construction. This ensures a symmetric expansion of the resistors and maximum stability to high load impulses. The aluminium profile with the fixed resistor element is filled with quartz sand. This ensures a minimum change of the resistor surface temperature even if the resistor element reaches its maximum temperature during a pulse load.
Small size
Overload 10-16 x P nom (5 seconds pulse, 120 s cycle), depending on ohmic value
Aluminium case ensures high IP rating
Low thermal drift of 100 ppm/K ensured by nickel-chrome 8020 alloy
Mica insulation ensures high dielectric strength
Low noise level
Low surface temperature
Capable of withstanding high vibration
Filled with Si02 for high-power overload capability and high thermal capacity
Thermal relief expansion mounting feet
Optional thermal switch for thermal protection is available
Flying leads
Fully insulated with no external live parts
CCH resistors belong to Danotherm's medium range of Alpha aluminium housed brake resistors. They are insulated, compac...
