Ceramic wirewound Resistors
Power resistors
- Danotherm
- / Power resistors
- / Self cooled
- / Ceramic wirewound
Salient features
- Power 180W - 5kW
- Overload factor [email protected]
- Working voltage 400 - 850V
- Dielectric strength 50Hz 1 min. 2500V
- Protection degree IP20/IP21
- Natural air cooled
Description
Sigma resistors comply of one or multiple ceramic wirewound resistors fitted with a protection grid and optional connection box and or thermal switch. The ingress protection can be IP00 or IP21. Nominal power ranges from 180W till 5kW.
On request a UL approved version is available.
Salient features
- Power 17W - 1kW*
- Overload factor [email protected]
- Working voltage 270 - 5700V
- Protection degree IP00
- Natural air cooled / ventilator cooled
* power rating with natural air cooling
Description
Ceramic Wirewound resistors are build up from a ceramic core where a resistor wire in wound on. The are offered in various diameters ranging from 10 till 55mm and lengths from 44 till 590mm. The resistor has either a round or flat oval shape. Coating can be cement or vitreous enameled. These kind of traditional resistors are well proven and very cost effective. Applications are charging and de-charging resistors, brake resistors for small drives systems, snubbers in controlled and uncontrolled rectifiers.
