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SIGMA Ceramic Brake Resistors

Power range from 100W to 5kW, a popular and economically type of brake resistor capable of solving many brake resistor jobs.
The resistor components consist of fully welded wire wound ceramic resistors, wound on corderite, which is a type of ceramic with a very high resistance to temperature changes.The wire is coated with aluminium phosphate to protect the wire and conduct the heat developed in the wire on to the ceramic core. Aluminium-phosphate is stable at 500°C.

The resistor cages comply with IP20 providing electrical and thermal protection. The resistors have a nominal load from 100W - 5kW. They are particularly suitable for pulse loads of 10 – 20 times more compared to the nominal load because of the ceramic core material and an extra high weight of wire.
We have developed Thermal Simulation corresponding to all resistor types and resistor values. By using these models we are able to calculate the temperature rises in the resistor wire for all possible load situations. Danotherm assists customers in finding the optimum solution for any situation.
  ? SIGMA Datasheet ? Contact sales department
 

Specifications

Power Range	100W - 5kW (Average)
Pulse Load	10 X in 5 s
De-rating	Linear: 40°C, 100% - 70 °C: 0,8 PN
Environmental	-40 °C - 90 °C
Resistance Tolerance	±10%
Dielectric Strength	2500VAC, 1 Minute
Working Voltage	1100VDC (UL listed version: 600V)
Insulation Resistance	> 20 M OHM
Protection class	IP20
Max surface temperature	On Resistor component: 350 °K
Cooling media	Air
Thermo watch (optional)	Optional
Connection	Screw
Climatic	EN 60 068-2-2
Vibration	EN 60 068-2-6 SIGMA, UL Listed Version The resistor components consist of fully welded wire wound ceramic resistors, which is a well-known and approved technology. The base material is corderite, which is a type of ceramic with a very high resistance to temperature changes and the wire is coated with aluminium phosphate to protect the wire and conduct the heat developed in the wire on to the ceramic core. Aluminium-phosphate is stable at 500°C. The resistor cages comply with IP21 when mounted  vertically (otherwise IP20) giving electrical and thermal protection. The resistors have a nominal load from 430W and upward and are particularly suitable for pulse loads of 10 – 20 times more compared to the nominal load. This is due to the ceramic core material and an extra high weight of wire. We have developed Thermal Simulation corresponding to all resistor types and resistor values. By using these models we are able to calculate the temperature rises in the resistor wire for all possible load situations. Danotherm offers assistance to customers in finding the optimum solution for any situation.   ? SIGMA UL Datasheet ? Contact sales department   Specifications Power Range 430W - 4855W (Average) Pulse Load 25 * PN in 1 sec; 10*PN in 10 s De-rating Linear @ 40°C: 100% - @70°C: 0.5 * PN Environmental -40°C- 90 °C Resistance Tolerance ±10% Dielectric Strength 2500VAC, 1 Minute Working Voltage 600V Insulation Resistance >20M OHM Protection class IP21, Type 1X Max surface temperature 350°C Thermo watch (optional) 250°C Connection Screw Climatic EN 60 068-2-2 Vibration EN 60 068-2-6 Approvals UL 508. Listed File E208678 Norms UL 508