CBW
  • CBW

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Manufacturer: Danotherm

CBW

Type Resistance Range R [Ω] min-max Rated Power for Initial Temperature and Temperature Change T, Hottest Spot Temperature on Surface 190°C
Input Temperature 20°C Input Temperature 40°C Input Temperature 50°C
10 20 40 10 20 40 10 20 40
CBW 180 0,04- 13 1200 1150 1050 1050 1000 930 960 930 860
CBW 210 0,05 - 2000 1650 1600 1500 1450 1400 1300 1350 1300 1200
CBW 260 0,07 – 2000, 2350 2300 2150 2050 2000 1850 1950 1850 1700
CBW 330 0,09 - 2000 2950 2850 2700 2600 2500 2300 2400 2300 2150
CBW 400 0,11 - 2000 3550 3450 3200 3100 3000 2800 2900 2800 2550
CBW 460 0,14 - 2000 4100 4000 3750 3600 3500 3250 3400 3250 3000
CBW 560 0,18- 110 4950 4800 4500 4350 4200 3900 4050 3900 3600
CBW 660 0,22- 130 5900 5700 5350 5200 5000 4650 4800 4650 4300
CBW 760 0,27- 150 6700 6500 6100 5900 5700 5300 5500 5300 4900
CBW 860 0,31 - 180 7650 7450 6950 6750 6500 6050 6250 6050 5550
CBW 960 0,35 - 220 8500 8250 7700 7450 7200 6700 6950 6700 6150


Construction and Key Properties

  • Compact dimensions
  • Nominal power range 1200W – 8500W
  • Energy levels from 27kJ – 675kJ (5s pulse, 120s cycle), depending on resistance value
  • Aluminum housing for high IP rating
  • IP50-IP65
  • Internal wire spirals wound on ceramics for lower resistance
  • Internal components of wire spirals wound on mica for lower resistance
  • Nickel-chromium alloy 8020 for low thermal drift
  • Mica insulation for high dielectric strength
  • Filling of Al2O3 or SiO2 for high thermal capacity/high overload capability
  • Low surface temperature
  • Low noise level
  • High vibration resistance
  • Thermally expansive mounting feet (CAR type)
  • Optional thermal switch or PT100 element for thermal protection
  • 300mm wire with sleeve or box connection up to 10 mm2
  • Multi-element housings (from 2 to 3)
  • Customizable to customer needs and applications (available OEM versions)

CBW resistors are used in wind turbines as filtering resistors and on board medium-power traction systems, such as trams - as braking resistors. In some tram systems, recovered power is used for heating the interior of the tram on cold days.

Maximum Dissipated Power

The maximum continuous power depends absolutely on the incoming water temperature and the temperature increase of the water, which is directly dependent on the water flow. Table 3 shows the maximum continuous power at a given water flow and different ΔT.

Flow Rate L/h ∆T Water ∆T Water/Glycol 60/40
10 15 20 25 30 10 15 20 25 30
7 kW 710 470 350 280 240 1070 710 530 420 360
6 kW 610 400 300 240 200 920 600 450 360 300
5 kW 510 340 250 200 170 770 510 380 300 260
4 kW 400 270 200 160 130 600 410 300 240 200
3 kW 300 200 150 120 100 450 300 230 180 150
2 kW 200 130 100 80 70 300 200 150 120 110
1 kW 100 65 50 40 35 150 100 80 60 50


Pressure Drop

The pressure drop strongly depends on the used nozzles. Many customers use their own nozzles, which makes it difficult to provide standard values. For CBW460 resistor with SW22x45.5 and a flow rate of 120 l/h, the pressure drop is 55 mBar per channel, 110 mBar in total, for two cooling tubes included.

Temperature Coefficient 100 ppm/K
Dielectric Strength 3500 VAC at 1 minute
Insulation Resistance > 20MΩ / housing
Overload at One-second Pulse per Hour 70 - 250 x (depending on the resistor)
Overload at Five-second Pulse per Hour 20 - 60 x (depending on the resistor)
Environment - 40 °C / +70 °C
Value Loss for Wirewound Version Linear: 40°C = Pn to 70°C = 0.85 * Pn
Value Loss for TW 200°C Version Linear: 40°C = Pn to 70°C = 0.65 * Pn
Value Loss for Vertical Mounting No loss
Value Loss for Horizontal Mounting 0.8 * Pn
Value Loss at High Altitudes 1000m No loss
1500m 0.94 * Pn
3000m 0.82 * Pn
Mounting Instructions It is recommended to keep a distance of 200mm to the nearest element to prevent heating of neighboring components.
If two or more inhibitory resistors are mounted next to each other, a distance of 400mm between them should be maintained. If closer, reduce the rated power.
Cooling The rated power of the resistors applies to passive, air cooling conditions.
Vibrations According to EN 60068-2-6 Frequency Range 1-100Hz Acceleration/Amplitude
1 - 13 Hz ± 1mm
13 - 100 Hz at ± 0.7G
Corrosion Resistance According to IEC 60721-3-3/3K3 (C2 medium) 200h cyclic salt mist IEC60068-2-52
Connection Recommendations To minimize EMC interference, the use of screens, especially with any PWM, is recommended.
Resistance Tolerance 10% (optionally 5%)
Operating Voltage Can Version UL: 600VAC / 850VDC; IEC: 690VAC /975VDC
Wirewound Version 1000VAC / 1400VDC
Resistor Heating Time Constant 1000-3000s
Thermal Switch (optional) Thermal Switch 130 / 160 / 180 / 200 °C, 2A, 250 VAC NC
Minimum Voltage 2V
Minimum Current 10mA
Rated Current/Voltage 2.5A @ 250VAC cos ʕ=1
Dielectric Voltage 2000VAC (3500VAC between TS and R)
Temperature Requirements for Cables IP 21 80°C
IP 65 90°C


Applications

CBW power resistors are used in solutions where large power pulses or high average power are present. The resistive elements are immersed in sand. This serves as a high thermal capacity, capable of absorbing large energy pulses. Energy is conducted through the sand and absorbed by the water. Approximately 90% of the total dissipation will be captured by the water, while the remaining portion is emitted into the air. It is also possible to insulate the aluminum housing, thereby promoting the dispersion of almost the entire energy into the water.

CBW resistors are employed in wind turbines as filtering resistors and in medium-power traction vehicles such as trams, where they function as braking resistors. In certain tram systems, the recovered power is utilized to heat the interior of the tram during cold days.

Maximum Distributed Power

The maximum continuous power is absolutely dependent on the incoming water temperature and the increase in water temperature, which is directly linked to water flow rate. Table 3 displays the maximum continuous power at a given water flow rate and varying ΔT.

Flow Rate L/h ∆ T Water ∆ T Water/Glycol 60/40
10 15 20 25 30 10 15 20 25 30
7 kW 710 470 350 280 240 1070 710 530 420 360
6 kW 610 400 300 240 200 920 600 450 360 300
5 kW 510 340 250 200 170 770 510 380 300 260
4 kW 400 270 200 160 130 600 410 300 240 200
3 kW 300 200 150 120 100 450 300 230 180 150
2 kW 200 130 100 80 70 300 200 150 120 110
1 kW 100 65 50 40 35 150 100 80 60 50


Pressure Drop

The pressure drop strongly depends on the used nozzles. Many customers use their own nozzles, which makes it difficult to provide standard values. For the CBW460 resistor with SW22x45.5 and a flow rate of 120 l/h, the pressure drop is 55 mBar per channel, 110 mBar in total, for two cooling tubes in the set.

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Type Resistance Range R [Ω] min-max Rated Power for Initial Temperature and Temperature Change T, Hottest Spot Temperature on Surface 190°C
Input Temperature 20°C Input Temperature 40°C Input Temperature 50°C
10 20 40 10 20 40 10 20 40
CBW 180 0,04- 13 1200 1150 1050 1050 1000 930 960 930 860
CBW 210 0,05 - 2000 1650 1600 1500 1450 1400 1300 1350 1300 1200
CBW 260 0,07 – 2000, 2350 2300 2150 2050 2000 1850 1950 1850 1700
CBW 330 0,09 - 2000 2950 2850 2700 2600 2500 2300 2400 2300 2150
CBW 400 0,11 - 2000 3550 3450 3200 3100 3000 2800 2900 2800 2550
CBW 460 0,14 - 2000 4100 4000 3750 3600 3500 3250 3400 3250 3000
CBW 560 0,18- 110 4950 4800 4500 4350 4200 3900 4050 3900 3600
CBW 660 0,22- 130 5900 5700 5350 5200 5000 4650 4800 4650 4300
CBW 760 0,27- 150 6700 6500 6100 5900 5700 5300 5500 5300 4900
CBW 860 0,31 - 180 7650 7450 6950 6750 6500 6050 6250 6050 5550
CBW 960 0,35 - 220 8500 8250 7700 7450 7200 6700 6950 6700 6150


Construction and Key Properties

  • Compact dimensions
  • Nominal power range 1200W – 8500W
  • Energy levels from 27kJ – 675kJ (5s pulse, 120s cycle), depending on resistance value
  • Aluminum housing for high IP rating
  • IP50-IP65
  • Internal wire spirals wound on ceramics for lower resistance
  • Internal components of wire spirals wound on mica for lower resistance
  • Nickel-chromium alloy 8020 for low thermal drift
  • Mica insulation for high dielectric strength
  • Filling of Al2O3 or SiO2 for high thermal capacity/high overload capability
  • Low surface temperature
  • Low noise level
  • High vibration resistance
  • Thermally expansive mounting feet (CAR type)
  • Optional thermal switch or PT100 element for thermal protection
  • 300mm wire with sleeve or box connection up to 10 mm2
  • Multi-element housings (from 2 to 3)
  • Customizable to customer needs and applications (available OEM versions)

CBW resistors are used in wind turbines as filtering resistors and on board medium-power traction systems, such as trams - as braking resistors. In some tram systems, recovered power is used for heating the interior of the tram on cold days.

Maximum Dissipated Power

The maximum continuous power depends absolutely on the incoming water temperature and the temperature increase of the water, which is directly dependent on the water flow. Table 3 shows the maximum continuous power at a given water flow and different ΔT.

Flow Rate L/h ∆T Water ∆T Water/Glycol 60/40
10 15 20 25 30 10 15 20 25 30
7 kW 710 470 350 280 240 1070 710 530 420 360
6 kW 610 400 300 240 200 920 600 450 360 300
5 kW 510 340 250 200 170 770 510 380 300 260
4 kW 400 270 200 160 130 600 410 300 240 200
3 kW 300 200 150 120 100 450 300 230 180 150
2 kW 200 130 100 80 70 300 200 150 120 110
1 kW 100 65 50 40 35 150 100 80 60 50


Pressure Drop

The pressure drop strongly depends on the used nozzles. Many customers use their own nozzles, which makes it difficult to provide standard values. For CBW460 resistor with SW22x45.5 and a flow rate of 120 l/h, the pressure drop is 55 mBar per channel, 110 mBar in total, for two cooling tubes included.

Temperature Coefficient 100 ppm/K
Dielectric Strength 3500 VAC at 1 minute
Insulation Resistance > 20MΩ / housing
Overload at One-second Pulse per Hour 70 - 250 x (depending on the resistor)
Overload at Five-second Pulse per Hour 20 - 60 x (depending on the resistor)
Environment - 40 °C / +70 °C
Value Loss for Wirewound Version Linear: 40°C = Pn to 70°C = 0.85 * Pn
Value Loss for TW 200°C Version Linear: 40°C = Pn to 70°C = 0.65 * Pn
Value Loss for Vertical Mounting No loss
Value Loss for Horizontal Mounting 0.8 * Pn
Value Loss at High Altitudes 1000m No loss
1500m 0.94 * Pn
3000m 0.82 * Pn
Mounting Instructions It is recommended to keep a distance of 200mm to the nearest element to prevent heating of neighboring components.
If two or more inhibitory resistors are mounted next to each other, a distance of 400mm between them should be maintained. If closer, reduce the rated power.
Cooling The rated power of the resistors applies to passive, air cooling conditions.
Vibrations According to EN 60068-2-6 Frequency Range 1-100Hz Acceleration/Amplitude
1 - 13 Hz ± 1mm
13 - 100 Hz at ± 0.7G
Corrosion Resistance According to IEC 60721-3-3/3K3 (C2 medium) 200h cyclic salt mist IEC60068-2-52
Connection Recommendations To minimize EMC interference, the use of screens, especially with any PWM, is recommended.
Resistance Tolerance 10% (optionally 5%)
Operating Voltage Can Version UL: 600VAC / 850VDC; IEC: 690VAC /975VDC
Wirewound Version 1000VAC / 1400VDC
Resistor Heating Time Constant 1000-3000s
Thermal Switch (optional) Thermal Switch 130 / 160 / 180 / 200 °C, 2A, 250 VAC NC
Minimum Voltage 2V
Minimum Current 10mA
Rated Current/Voltage 2.5A @ 250VAC cos ʕ=1
Dielectric Voltage 2000VAC (3500VAC between TS and R)
Temperature Requirements for Cables IP 21 80°C
IP 65 90°C


Applications

CBW power resistors are used in solutions where large power pulses or high average power are present. The resistive elements are immersed in sand. This serves as a high thermal capacity, capable of absorbing large energy pulses. Energy is conducted through the sand and absorbed by the water. Approximately 90% of the total dissipation will be captured by the water, while the remaining portion is emitted into the air. It is also possible to insulate the aluminum housing, thereby promoting the dispersion of almost the entire energy into the water.

CBW resistors are employed in wind turbines as filtering resistors and in medium-power traction vehicles such as trams, where they function as braking resistors. In certain tram systems, the recovered power is utilized to heat the interior of the tram during cold days.

Maximum Distributed Power

The maximum continuous power is absolutely dependent on the incoming water temperature and the increase in water temperature, which is directly linked to water flow rate. Table 3 displays the maximum continuous power at a given water flow rate and varying ΔT.

Flow Rate L/h ∆ T Water ∆ T Water/Glycol 60/40
10 15 20 25 30 10 15 20 25 30
7 kW 710 470 350 280 240 1070 710 530 420 360
6 kW 610 400 300 240 200 920 600 450 360 300
5 kW 510 340 250 200 170 770 510 380 300 260
4 kW 400 270 200 160 130 600 410 300 240 200
3 kW 300 200 150 120 100 450 300 230 180 150
2 kW 200 130 100 80 70 300 200 150 120 110
1 kW 100 65 50 40 35 150 100 80 60 50


Pressure Drop

The pressure drop strongly depends on the used nozzles. Many customers use their own nozzles, which makes it difficult to provide standard values. For the CBW460 resistor with SW22x45.5 and a flow rate of 120 l/h, the pressure drop is 55 mBar per channel, 110 mBar in total, for two cooling tubes in the set.

Less
Read more
CBW
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