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Dynamic Braking Resistor Selection
156
Dynamic Braking Resistor Selection
North America
Rated
Input
Voltage
Rated
HP
Rated
kW
Model
Number
Cube
size
Power
Dissipation kW
(Worm Gear)
Resistor
Value Range
(Worm Gear)
Power
Dissipation kW
(Planetary Gear)
Resistor
Value
(Planetary Gear)
10 7.5
-4018 B
1.6
kW 100
Ω
- 32
Ω
3.4 kW
47
Ω
- 32
Ω
15 11
-4024
B 2.4
kW 68
Ω
- 24
Ω
5 kW
32
Ω
- 24
Ω
20 15
-4034
C 3.2
kW 50
Ω
- 20
Ω
6.8 kW
24
Ω
- 20
Ω
380V
to
480V
25 18
-4039
C 3.8
kW 42
Ω
- 20
Ω
8.1 kW
20
Ω
7.5 5.5
-2028 A
1.6
kW 25
Ω
- 8
Ω
3.4 kW
12
Ω
- 8
Ω
10 7.5
-2035 B
2.4
kW 17
Ω
- 8
Ω
5 kW
8
Ω
15 11
-2047
B 3.2
kW 12
Ω
- 5
Ω
6.8 kW
6
Ω
- 5
Ω
200V
to
240V
20 15
-2060
C 3.8
kW 10
Ω
- 4
Ω
8.1 kW
5
Ω
- 4
Ω
European
Rated
Input
Voltage
Rated
kW
Model
Number
Cube
size
Power
Dissipation kW
(Worm Gear)
Resistor
Value Range
(Worm Gear)
Power
Dissipation kW
(Planetary Gear)
Resistor
Value Range
(Planetary Gear)
4 -4011
A
0.9
kW
187
Ω
- 53
Ω
1.8 kW
89
Ω
- 53
Ω
5.5 -4015
A 1.6
kW
100
Ω
- 32
Ω
3.4 kW
47
Ω
- 32
Ω
7.5 -4021
B 2.4
kW
68
Ω
- 32
Ω
5 kW
32
Ω
11 -4028
B 3.2
kW
50
Ω
- 24
Ω
6.8 kW
24
Ω
380V
to
440V
15 -4039
C 3.8
kW
42
Ω
- 20
Ω
8.1 kW
20
Ω
Assumptions for Brake Resistor Recommendations
1) Peak regenerative requirement is: (Cube KW) * 2.0 * (Gear Efficiency) * (Motor Efficiency). This
occurs at start of deceleration under maximum overhauling load (for counterweight < 50%, this is full
load car, start of decel going down). From peak regen power the maximum resistor is calculated as: R
= V
dc
2
/ P
peak
2) Motor efficiency is 95%, jerk out is assumed to be infinite
3) 200% regenerative torque limit
4) Worm gear efficiency = 45%; planetary gears = 95%
5)
For power dissipations, a 50% duty cycle is assumed (i.e. elevator runs continuously up and down but
regenerates 50% of the time). Also, 100% regenerative power required. Average power = (Cube KW)
* 1.0 * (Gear Efficiency) * (Motor Efficiency) * 0.5
6) Minimum resistor values based on 100% of device rated current