WITTUR servogearless WSG-S2.3, Operating Instruction

Page: 59 / 90

Technical data 3
i
j
| BA 14.0197 | 11/2010
17
3.3 Rated data (selection data)
BFKXXX−011.iso/dms
Fig. 2 Operating times of the spring−applied brakes
t
1
Engagement time t
11
Reaction delay during engagement
t
2
Disengagement time (up to M = 0.1 M
r
) t
12
Rise time of the brake torque
M
rated
Brake torque U Excitation
Type Rated
torque
1)
Max.
perm.
friction
work
Transition
operating
frequency
Operating times [ms] at s
Lürated
and 0.7 I
N
Max.
speed
2)
Mrated Q
E
S
hü
DC engagement
Disengag
ement
[Nm] [J] [h
−1
]
t
11
t
12
t
1
t
2
n
max.
[rpm]
BFK464−18 S 2 x 225 60000 20 12 45 57 130 455
BFK464−19 S 2 x 280 68000 19 455
BFK464−20 S 2 x 275 80000 19 15 80 95 150 455
BFK464−20 S.1 2 x 325 80000 19 15 80 95 150 455
BFK464−25 S 2 x 600 120000 15 30 65 95 175 455
BFK464−28 S 2 x 900 180000 14 455
Tab. 3 Friction work − operating frequency − operating times
1) Minimum brake torque when all components are run in with
D
n=100 rpm
2) Max. speed according to EC type−examination certificate (for higher speeds contact the manufacturer)
The transition from the state without braking torque to the steady braking torque is not without
delay. The engagement times are valid for switching on the DC side with a spark suppressor
( (
31)). The diagram shows the delay during engagement t
11
, the rise time of the braking
torque t
12
and the engagement time t
1
= t
11
+ t
12
, as well as the disengagement time t
2
.
Disengagement time
The disengagement time is not influenced by DC or AC switching operations.