Mechanical installation
Spring−applied brakes
25
Lenze ¯ BA 33.0008 ¯ 5.0
For permissible operating speeds and characteristics, please see the motor catalogue
applicable in each case. Emergency stops at higher speeds are possible, but high
switching energy increases wear on the friction surfaces and the hub.
(
Stop!
The friction surfaces must always be free from oil and grease because
even small amounts of grease or oil will considerably reduce the braking
torque.
The formula below provides a simplified way to calculate friction energy per switching
cycle which must not exceed the limit value for emergency stops that depends on the
operating frequency (
^
motor catalogue; Lenze drive solutions: formulas,
dimensioning, and tables).
Q
+
½
@
J
tot
@
Dw
2
@
M
K
M
K
*
M
L
Q [J]
Friction energy
J
tot
[kgm
2
] Total mass inertia (motor + load)
Dw
[
1
/
s
]
Angular velocity
w
=2
p
n
/
60
, n= speed [rpm]
M
K
[Nm]
Characteristic torque
M
L
[Nm]
Load torque
Depending on the operating conditions and possible heat dissipation, surface
temperatures can be up to 130 °C.
,
More detailed information on the used brakes is provided in the
corresponding catalogues.
5.6
Locking of the manual release
Scope of supply
Geared motor
Shipping bag
GT−GNG−GST−010.iso/dms
GT−GXX−012.iso/dms
GT−GXX−013.iso/dms
¯
1 Manual release lever with knob
¯
1 Terminal block
¯
1 Cheese head screw with nut
