CVS resistors are the largest aluminum-housed resistors that Danotherm offers now. They are typically used in high-power pulse load applications like Low Voltage Ride Through for wind turbines or as brake resistors in drives systems. UL-certified resistor components provide high reliability.
A CVS resistor has a modular design: A maximum of four housings can be joined together to create larger units with higher nominal power ratings and higher pulse load capabilities. A single housing can be specified with a power rating between 1390 W and 4350 W. CVS resistors can handle up to 1000 VAC or 1400 VDC in terms of operating voltage.
The aluminum extruded housing has been optimized for the application. Thermal expansion feet allow the resistor to heat up without any mechanical stress. Integrated slots allow fixture of PT100 sensors. Optionally an integrated thermal switch is offered for overtemperature signaling. A thermal switch is available as an option.
Aluminum is chosen as the material for the housings because it is non-corrosive, non-magnetic, lightweight yet durable, and is an excellent conductor of heat. The resistors are fully insulated and have no external live parts.
Determined by the resistor length and resistance value, CVS resistors can handle 100 to 120 times the nominal power rating. This overload value is valid for one 5-second pulse that occurs once every 30 minutes.
Typical applications for Danotherm CVS resistors are wind and gas turbine dump resistors and supercapacitor discharge resistors. Customized and OEM versions are available upon request, and dimensions can be adapted to your requirements.
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