CBT-H / CBT-V

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 # Housings Nominal power [W] @ 40°C according UL0508
Single housing 2 housings 3 housings 4 housings
Single housing
no thermal switch thermal switch no thermal switch
R [Ω]
Length / Type CBT * CBT CBT * CBT CBT CBT CBT
min-max
CBT 180 380 455 380 380 0.04 - 13
CBT 210 520 585 520 520 0.05 - 2000
CBT 260 760 850 750 750 0.07 - 2000
CBT 330 1100 1350 1100 1100 0.09 - 2000
CBT 400 1440 1650 1440 1440 1920 2610 3490 0.11 - 2000
CBT 460 1730 1900 1725 1725 2540 3810 5080 0.14 - 2000
CBT 560 2310 2095 3170 4710 6250 0.18 - 110
CBT 660 2720 2470 3810 5720 7620 0.22 - 130
CBT 760 3200 2905 4530 6530 8710 0.27 - 150
CBT 860 3640 3305 4990 7260 9800 0.31– 180
CBT 960 4070 3695 6260 8170 10890 0.35 - 220

* CBT for high Ohm values

See nomenclature page 64

Construction and salient properties • Al2O3 or SiO2 filled for high thermal capacity/high
• Compact dimensions power overload capability
• Nominal power range from 380W—4070W • Low surface temperature
• Energy levels from 25kJ-550kJ per case housing • Low noise level
(5s duty,120s cycle), depending on ohmic value • High vibration withstand capability
• Aluminium case housing for high IP rating • Thermal relief expansion mounting feet
• IP50-IP65 • Optional thermal switch or PT100 element for
• Internal ceramic supported wirewound spirals for thermal protection
lower ohmic values • Cable 300mm (AWG 14—AWG4) with cable slee-
• Internal mica supported wirewound elements for ves or box connection up to 50mm2
higher ohmic values • Multiple case housings (from 2-4 housings)
• Nickel-Chrome 8020 alloy for low thermal drift • Customized to your needs and application (OEM
• Mica insulated for high dielectric strength versions available)
• For UL approval, consult Danotherm

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Temperature Coefficient: 100 ppm/K
Dielectric strength 3500 VAC @ 1 minute
Isolation Resistance: > 20MΩ / case housing
Overload: @ 1 sec pulse / hour 10 - 100 x (depending on resistor)
Overload: @ 5 sec pulse / hour 4 - 25 x (depending on resistor)
Environmental: - 40 °C / +70 °C
De-rating cable version Linear: 40°C = Pn to 70°C = 0.85 * Pn
De-rating TW 200°C version Linear: 40°C = Pn to 70°C = 0.65 * Pn
De-rating vertical mounting no de-rating
De-rating horizontal mounting 0.8 * Pn
1000 m no de-rating
De-rating at high altitudes 1500 m 0.94 * Pn
3000 m 0.82 * Pn
It is recommended to keep a distance of 200mm to the nearest
object to prevent heating of a neighboring component.
Mounting instructions If two or more brake resistors are mounted next to each other
the distance between these should be 400mm. If this is less
then the nominal power needs to be de-rated.
The nominal power of the resistors refers to cooling conditions
Cooling
with Free Natural Air Cooling.
Acc. To EN 60068-2-6
frequency range 1 - 100Hz
Acceleration / Amplitude
Vibration
1 - 13 Hz ± 1mm
13 - 100 Hz @ ± 0.7G
Acc. IEC 60721-3-3/3K3 (C2 medium)
Corrosive resistance
200 hours cyclic salt mist IEC 60068-2-52

To minimize EMC interference screened cables are recommen-

Connection recommendations
ded. in particular with any PWM brake pattern.

Resistance tolerance ± 10% (optional 5%)

Standard UL: 600VAC / 850VDC ; IEC: 690VAC / 975VDC
Working voltage
On request 1000VAC / 1400VDC
Time constant for heating up
1000s
resistor
Thermal switch (optional) 130 / 160 / 180 / 200 °C. 2A. 250 VAC NC
Minimum voltage 2V
Minimum current Thermal switch 10mA
Rated current / voltage 2.5A @ 250VAC cos ʕ=1
Dielectric voltage 2000VAC (3500VAC between TS and R)

Temperature requirements on IP 21 80°C

cables IP 65 90°C

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CBT-H ... CT ... cable connection IP50 Mechanical drawings
with and without thermal switch
L±2 L1 ± 2 Weight
Type
mm mm g
CBT-H 180 C(H/E)(T) 0X1 180 70 3.1
CBT-H 210 C(H/E)(T) 0X1 210 110 3.6
CBT-H 260 C(H/E)(T) 0X1 260 160 4.5
CBT-H 330 C(H/E)(T) 0X1 330 230 5.9
CBT-H 400 C(H/E)(T) 0X1 400 300 7.3
CBT-H 460 C(H/E)(T) 0X1 460 360 8.5
CBT-H 560 C(H/E)(T) 0X1 560 460 10
CBT-H 660 C(H/E)(T) 0X1 660 560 12
CBT-H 760 C(H/E)(T) 0X1 760 660 13.8
CBT-H 860 C(H/E)(T) 0X1 860 760 16
CBT-H 960 C(H/E)(T) 0X1 960 860 17.8

CBT-V ... CT ... cable connection IP50

with and without thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g
CBT-V 180 C(H/E)(T) 0X1 180 70 3.1
CBT-V 210 C(H/E)(T) 0X1 210 110 3.6
CBT-V 260 C(H/E)(T) 0X1 260 160 4.5
CBT-V 330 C(H/E)(T) 0X1 330 230 5.9
CBT-V 400 C(H/E)(T) 0X1 400 300 7.3
CBT-V 460 C(H/E)(T) 0X1 460 360 8.5
CBT-V 560 C(H/E)(T) 0X1 560 460 10
CBT-V 660 C(H/E)(T) 0X1 660 560 12
CBT-V 760 C(H/E)(T) 0X1 760 660 13.8
CBT-V 860 C(H/E)(T) 0X1 860 760 16
CBT-V 960 C(H/E)(T) 0X1 960 860 17.8

CBT-H ... D ... box connection IP54

with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g
CBT-H 180 D(H/E)(T) 2X1 180 70 3.9
CBT-H 210 D(H/E)(T) 2X1 210 110 4.2
CBT-H 260 D(H/E)(T) 2X1 260 160 5.1
CBT-H 330 D(H/E)(T) 2X1 330 230 6.7
CBT-H 400 D(H/E)(T) 2X1 400 300 8.2
CBT-H 460 D(H/E)(T) 2X1 460 360 9.2
CBT-H 560 D(H/E)(T) 2X1 560 460 11
CBT-H 660 D(H/E)(T) 2X1 660 560 12.8
CBT-H 760 D(H/E)(T) 2X1 760 660 14.6
CBT-H 860 D(H/E)(T) 2X1 860 760 16.8
CBT-H 960 D(H/E)(T) 2X1 960 860 18.6

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 CBT-H ... G ... box connection IP20/IP21
with thermal switch
L±2 L1 ± 2 Weight
Type
mm mm g
CBT-H 180 G(H/E)(T) 2X1 180 70 3.9
CBT-H 210 G(H/E)(T) 2X1 210 110 4.2
CBT-H 260 G(H/E)(T) 2X1 260 160 5.1
CBT-H 330 G(H/E)(T) 2X1 330 230 6.7
CBT-H 400 G(H/E)(T) 2X1 400 300 8.2
CBT-H 460 G(H/E)(T) 2X1 460 360 9.2
CBT-H 560 G(H/E)(T) 2X1 560 460 11
CBT-H 660 G(H/E)(T) 2X1 660 560 12.8
CBT-H 760 G(H/E)(T) 2X1 760 660 14.6
CBT-H 860 G(H/E)(T) 2X1 860 760 16.8
CBT-H 960 G(H/E)(T) 2X1 960 860 18.6

CBT-V ... G ... box connection IP20/IP21

with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g

CBT-V 400 G(H/E)(T) 2X2 400 370 18

CBT-V 460 G(H/E)(T) 2X2 460 430 20.5
CBT-V 560 G(H/E)(T) 2X2 560 530 23.5
CBT-V 660 G(H/E)(T) 2X2 660 630 27
CBT-V 760 G(H/E)(T) 2X2 760 730 30.5
CBT-V 860 G(H/E)(T) 2X2 860 830 34.0
CBT-V 960 G(H/E)(T) 2X2 960 930 37.5

CBT-V ... G ... box connection IP20/IP21

with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g

CBT-V 400 G(H/E)(T) 2X3 400 370 25.5

CBT-V 460 G(H/E)(T) 2X3 460 430 29
CBT-V 560 G(H/E)(T) 2X3 560 530 33.5
CBT-V 660 G(H/E)(T) 2X3 660 630 39
CBT-V 760 G(H/E)(T) 2X3 760 730 44.5
CBT-V 860 G(H/E)(T) 2X3 860 830 51
CBT-V 960 G(H/E)(T) 2X3 960 930 57

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CBT-H ... B 2.1 cable connection IP65 Mechanical drawings
with thermal switch
L±2 L1 ± 2 Weight
Type
mm mm g
CBT-H 180 B(H)(T) 2X1 180 70 3.9
CBT-H 210 B(H)(T) 2X1 210 110 4.2
CBT-H 260 B(H)(T) 2X1 260 160 5.1
CBT-H 330 B(H)(T) 2X1 330 230 6.7
CBT-H 400 B(H)(T) 2X1 400 300 8.2
CBT-H 460 B(H)(T) 2X1 460 360 9.2
CBT-H 560 B(H)(T) 2X1 560 460 11.0
CBT-H 660 B(H)(T) 2X1 660 560 12.8
CBT-H 760 B(H)(T) 2X1 760 660 14.6
CBT-H 860 B(H)(T) 2X1 860 760 16.8
CBT-H 960 B(H)(T) 2X1 960 860 18.6

CBT-V ... B 2.2 cable connection IP65

with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g

CBT-V 400 B(H)(T) 2X2 400 370 18.0

CBT-V 460 B(H)(T) 2X2 460 430 20.5
CBT-V 560 B(H)(T) 2X2 560 530 23.5
CBT-V 660 B(H)(T) 2X2 660 630 27.0
CBT-V 760 B(H)(T) 2X2 760 730 30.5
CBT-V 860 B(H)(T) 2X2 860 830 35.5
CBT-V 960 B(H)(T) 2X2 960 930 39.0

CBT-V ... B 2.3 box connection IP65

with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g

CBT-V 400 B(H/E(T) 2X3 400 370 25.5

CBT-V 460 B(H/E)(T) 2X3 460 430 29.0
CBT-V 560 B(H/E)(T) 2X3 560 530 33.5
CBT-V 660 B(H/E)(T) 2X3 660 630 39.0
CBT-V 760 B(H/E)(T) 2X3 760 730 44.5
CBT-V 860 B(H/E)(T) 2X3 860 830 51.0
CBT-V 960 B(H/E)(T) 2X3 960 930 57.0

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 CBT-V ... B ... box connection IP65
with thermal switch

L±2 L1 ± 2 Weight
Type
mm mm g

CBT-V 400 B(H/E)(T) 2X4 400 370 25.5

CBT-V 460 B(H/E)(T) 2X4 460 430 29.0
CBT-V 560 B(H/E)(T) 2X4 560 530 33.5
CBT-V 660 B(H/E)(T) 2X4 660 630 39.0
CBT-V 760 B(H/E)(T) 2X4 760 730 44.5
CBT-V 860 B(H/E)(T) 2X4 860 830 51.0
CBT-V 960 B(H/E)(T) 2X4 960 930 57.0

Connection box IP rating Cable Clamping Braid Connection TS Clamping Connection

gland mm mm mm2 gland mm mm2
B-box single IP65 M25 9-16.6 7.5 1.5-50 M12 3-7 0.5-4
B-box multiple IP65 M40 19-28 15 1.5-50 M12 3-7 0.5-4
D-box IP21 M25 9-16.6 7.5 0.75-10 M12 3-7 0.5-4
G-box IP21 M40 19-28 15 1.5-50 M12 3-7 0.5-4
K-type IP00 - - - 0.75-10 - - -

B-box B-box multiple housings

D-box G-box
 Type Square pulse each 120seconds, ambient temperature 40°C.

duty 1 Max duty 5 Max duty 10 Max duty 20 Max duty 40 Max
second temp seconds temp seconds temp seconds temp seconds temp
kW °C kW °C kW °C kW °C kW °C
CBT-H 180 15R 18.4 110 5.1 140 3 160 1.9 180 1.1 220
CBT-H 210 100R 24.7 110 6.1 130 3.8 150 2.5 190 1.7 240
CBT-H 260 60R 44 130 10.7 150 6.4 180 4 210 2.7 270
CBT-H 330 40R 71 140 22 190 13 220 8 260 4.3 280
CBT-H 400 30R 105 160 30 210 18 250 10.7 290 5.4 280
CBT-H 460 20R 128 170 36 220 21 250 12 290 6.2 290
CBT-H 560 15R 190 200 50 250 28 280 15 300 7.6 300
CBT-H 660 14R 257 230 64 270 36 300 18 300 9.2 310
CBT-H 760 12R 315 240 78 290 43 310 21.5 310 10.7 310
CBT-H 860 10R 370 250 89 300 50 320 25 320 12.4 320
CBT-H 960 9R0 480 290 110 330 56 330 28 330 14 330

Type Triangular pulse each 120seconds, ambient temperature 40°C.

duty 1 Max duty 5 Max duty 10 Max duty 20 Max duty 40 Max
second temp seconds temp seconds temp seconds temp seconds temp
kW °C kW °C kW °C kW °C kW °C
CBT-H 180 15R 39 110 10.7 140 6.3 160 3.8 190 2.3 220
CBT-H 210 100R 50 110 12.7 130 7.7 150 4.9 180 3.2 230
CBT-H 260 60R 90 140 22 160 13 180 8 210 5 250
CBT-H 330 40R 148 140 46 200 27 230 16 260 8.5 280
CBT-H 400 30R 217 160 63 220 37 250 21 280 10.6 280
CBT-H 460 20R 265 170 74 230 44 260 25 290 12.3 290
CBT-H 560 15R 390 200 103 260 58 290 30 300 15 300
CBT-H 660 14R 530 230 134 280 73 310 37 310 18 310
CBT-H 760 12R 645 240 160 290 86 310 43 310 22 310
CBT-H 860 10R 578 260 183 300 98 320 50 320 25 320
CBT-H 960 9R0 983 290 226 330 113 330 57 330 28 330

The table above shows pulse power ratings for typical resistor sizes/lengths and typical Ohm values.

Pulse load
The ability to withstand pulse-loads varies according to resistor size, length and diameter of the internal
resistor wire. As such, it is impossible to create standard graphs that would apply to all customer appli-
cations. In some cases, the load-profile will be the combination of a square and a triangular pulse, such as
is the case with Low Voltage Ride Through (LVRT) and Emergency Brake situations, as encountered in the
Wind Power industry.
On request, Danotherm performs simulations based on the actual application and for guidance, has pro-
duced tables for various load-profiles for resistors with standard wire. The above table shown is based on
a resistor with indicated ohm value and standard wire thickness. Depending on the application, resistor
construction can be adapted to optimally match the application. In the tables above, the peak powers
of trains of rectangular and triangular pulses of 120 second periods are shown for durations of 1 to 40
seconds.

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