Technical specifications
INTORQ | BA 14.0196 | 04/2016
18
1)
Minimum brake torque with run-in friction components at
Δ
n=100 rpm
2)
Typical values
3)
Max. speed according to EC-type examination certificate (for higher speeds, consultation with the manufacturer is re-
quired)
4)
Measured with induced voltage limitation of -800 V DC
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.
-
Connect the spark suppressors in parallel to the contact. If this switching is not admissible for safety
reasons (e.g. with hoists and lifts), the spark suppressor can also be connected in parallel to the
brake coil.
-
Circuit proposals:
❚
If the drive system is operated with a frequency inverter so that the brake will not be de-energised before
the motor is at standstill, AC switching is also possible (not applicable to emergency braking).
Disengagement time
The disengagement time is the same for DC and AC switching. The specified disengagement times always
refer to control using over-excitation.
Type
Rated torque
1)
Max.
permitted
switching
energy
Transitional
switching
frequency
Switching times [ms]
2)
at s
LN
and 0.7 I
N
Max. speed
3)
M
K
Q
E
S
hue
Engaging DC side
4)
Disengaging
[Nm]
[J]
[1/h]
t
11
t
12
t
1
t
2
n
max.
[rpm]
BFK455-28
2 x 1100
360000
7
80
220
300
370
455
2 x 1200
60
280
255
2 x 1700
20
240
480
455
2 x 1800
2 x 2065
30
250
460
255
Tab. 3:
Switching energy - switching frequency - switching times
NOTICE
If the brake is using AC-side switching, the engagement times increase approximately by a fac-
tor of 5 (refer to
