WITTUR WSG-SF Series, Руководство по эксплуатации

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Subject to changes without notice ! Änderungen vorbehalten !
Gearless Lift Machine
WSG-SF
Operating Instructions
EN
Code: GM.8.004284.EN
Date: 28. Jan 2020
Version: 0.16
Page: 80
Technical specifications
INTORQ | BA 14.0214 | 09/2017 19
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-side switch-
ing 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 / operating frequency
Abb. 3 Switching energy as a function of the operating frequency
The permissible operating frequency S
hmax
depends on the amount of heat Q
R
(refer to Figure 3). At a pre-
set operating 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
20R 22R
18R
19R
17R
28R
25R
Switching
energy
Q
R
Operating frequency S
h
S
hmax
S
hue
–
ln 1
Q
R
Q
E
-------- –
 
 
------------------------------- =
QS
max
Q
E
1 e
S
hue
–
S
h
-----------------
–
 
 
 
 
=