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NOTE: THE DYNAMIC BRAKING CIRCUIT IS DESIGNED TO COPE
WITH SHORT TERM STOPPING OR BRAKING ONLY.
IT IS NOT RATED FOR A CONTINUOUSLY OVERHAULING LOAD.
All 601 units are supplied without braking resistors. The following paragraphs
should be used as a guide to calculate the braking requirements of the system.
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Brake resistor assemblies must be rated to absorb both peak braking power during
deceleration and the average power over the complete cycle.
Peak braking power =
0.0055J x (n - n )
1
2
2
2
t
b
(W)
Average braking power P =
av
p
t
c
pk
x tb
J
- total inertia (kgm2)
n1 - initial speed (rpm)
n2 - final speed (rpm)
tb - braking time (s)
tc - cycle time (s)
10 mm
152 mm
22 mm
10 mm
12 mm
458#
PP
498#
PP
45#
PP
4.3mm
flying leads 500 mm
41 mm
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These resistors should be mounted on a heatsink (back panel) and covered to prevent
injury from burning.
Resistor Derating Graph
0
50
10
0
25
50
75
10
12
15
17
20
Ambient Temp (C)
% of Rated
Power
chassis mounted
free air
Eurotherm Part N
o
CZ389853
Resistance
100 ohms
Max Wattage
100 W
5 second rating
500 %
3 second rating
833 %
1 second rating
2500 %