Abbreviations Used - INTORQ BFK458 Originalbetriebsanleitung

General information
1.5

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
INTORQ | BA 14.0168 | 08/2019
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 fastening screws
Nm Braking torque at a constant speed of rotation
Rated torque of the brake, rated value at a relative speed of rotation of
Nm
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
Max. permissible friction energy for one-time switching, thermal parameter of
J
the brake
J Braking energy, friction energy
Maximally permissible friction energy for cyclic switching, depending on the
J
operating frequency
2
N/mm Tensile strength
Ohms Rated coil resistance at 20 °C
μm Averaged surface roughness
Operating frequency: the number of switching operations evenly spread over
1/h
the time unit
1/h Transition operating frequency, thermal parameter of the brake
Maximum permissible operating frequency, depending on the friction energy
1/h
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 hand-release
Engagement time, sum of the delay time and braking torque: rise time
ms
t = t + t
1 11 12
ms Disengagement time, time from switching the stator until reaching 0.1 M
3
K
11