Technical specifications
INTORQ | BA 14.0210 | 12/2016
18
Disengagement time
The disengagement time is not influenced by DC or AC switching operations.
Engagement time
The transition from a brake-torque-free state to a holding-braking torque is not free of time lags.
For emergency braking, short engagement times for the brake are absolutely essential. The DC switching in
connection with a suitable spark suppressor must therefore be provided.
❚
The engagement times apply for
DC switching
with a spark suppressor.
-
Spark suppressors are available for the rated voltages.
If the brake will be de-energized after the motor is at standstill, AC switching is also possible (not applicable
to emergency braking). In this case, the engagement times increase approximately by a factor of 5 (refer to
31 for connection).
3.4
Switching energy / switching frequency
Fig. 3
Switching energy as a function of the switching frequency
The permissible switching frequency S
hmax
depends on the amount of heat Q
R
(refer to Figure 3). At a pre-
set switching frequency S
h
, the permissible amount of heat is Q
Smax
.
With high speeds of rotation and switching energy, the wear increases strongly, because very high temper-
atures occur at the friction surfaces for a short time.
100
1000
10000
100000
1000000
1
10
100
1000
Sc
ha
lta
rbe
it Q
R
J
Schalthäufigkeit S
h
h
-1
20S + 20S.1
22S
18S
19S
17S
28S
25S + 25S.1
Switching energy Q
R
Switching frequency S
h
S
hmax
S
hue
–
ln 1
Q
R
Q
E
--------
–
-------------------------------
=
QS
max
Q
E
1 e
S
hue
–
S
h
-----------------
–
=
Содержание WSG-TB.3 series
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