Electrical installation
35
04/2019 - V01
DS 400.2
Ba
lla
st
–
d
im
en
sio
ni
ng
4.12
Ballast – dimensioning
External ballast resistance
Dimensioning
Maximum value of the braking power
P
max
[W] = Jg x n x n
91 x t
B
Ballast resistance power
P Ballast [W] = ___Pmax___
K1 x K2
Jg
n
n
t
B
=
=
=
=
Motor torque and reduced load
max. Speed
Speed difference
Braking time
kgm²]
[min
-1
]
[min
-1
]
[s]
Warning:
The ballast resistor may be up to 200 ° C hot. Resistance shockproof mount. Do not place
any heat-sensitive parts directly to the resistance or heat air flow. Note enclosure
temperature rise, resistance mounted outside as possible.
Braking time
Cooling time
