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Siemens CR 1 · 2015
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Configuration
(continued)
SIMOTICS motors for cranes
SIMOTICS SD – Severe Duty motors
KFB spring-set brake for SIMOTICS SD 1LP4, 1LP6
Braking energy and energy capability
The brake must be capable of absorbing the heat produced by
the occasional emergency braking operation. The maximum
permissible energy capability
Q
is shown in the diagram below
as a function of the number of switching operations.
The permissible energy capability
Q
for a single emergency trip
can be found in the table in section "Technical specifications".
Energy capability
Q
, braking speed
n
= 1500 rpm
10
2
1
0
-1
10
10
10
3
10
4
10
2
1
10
3
10
4
10
0
10
10
KFB 160
KFB 100
KFB 63
KFB 40
KFB 16
KFB 25
KFB 10
KFB 30
[ 1/h ]
G_D086_EN_00057
Energy capability per braking operation
Q
(kJ/switching
operation)
Braking operations per hour
z
Q
z
When the switching energy per
braking operation and number of
braking operations per hour are
known, the brake size can be
calculated.
Example:
= 35 kJ/switching operations and
= 100 braking operations/hour
= brake KFB 160
© Siemens AG 2015