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Preface and general information
1.4
Abbreviations used
Letter symbol Unit
F
R
I
I
H
I
L
I
N
M
A
M
dyn
M
K
n
max
P
H
P
L
P
N
Q
Q
E
Q
R
Q
Smax
R
m
R
N
R
z
S
h
S
hue
S
hmax
s
L
s
LN
s
Lmin
s
Lmax
s
HL
t
1
t
2
t
3
INTORQ | BA 14.0197 | 04/2016
Designation
N
Rated frictional force
A
Current
A
Holding current, at 20 °C and holding voltage
A
Release current, at 20 °C and release voltage
A
Rated current, at 20 °C and rated voltage
Nm
Tightening torque of fixing screws
Nm
Braking torque at a constant speed of rotation
Nm
Rated torque of the brake, rated value at a relative speed of rotation of 100 rpm
rpm
Maximum occurring speed of rotation during the slipping time t
W
Coil power during holding, after voltage change-over and 20 °C
W
Coil power during release, before voltage change-over and 20 °C
W
Rated coil power, at rated voltage and 20 °C
J
Quantity of heat/energy
J
Max. permissible friction energy for one-time switching, thermal parameter of
the brake
J
Braking energy, friction energy
J
Max. permissible friction energy for cyclic switching, depending on the switch-
ing frequency
Tensile strength
2
N/mm
Ohms
Rated coil resistance at 20 °C
μm
Average surface roughness
1/h
Operating frequency: the number of switching operations evenly spread over
the time unit
1/h
Transition switching frequency, thermal parameter of the brake
1/h
Maximum permissible switching frequency, depending on the friction energy
per switching operation
mm
Air gap: the lift of the armature plate while the brake is switched
mm
Rated air gap
mm
Minimum air gap
mm
Maximum air gap
mm
Air gap for manual release
ms
Engagement time, sum of the delay time and braking torque - rise time
t
= t
+ t
1
11
12
ms
Disengagement time, time from switching the stator until reaching 0.1 M
ms
Slipping time, operation time of the brake (according to t
3
dyn
) until standstill
11
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