Siemens SIMOTICS S-1FK2 - Page 79

Armature short-circuit braking
with external braking resistor
O
O
U
O
O
*
*
O
.
O
.
.
"
#SPQU
#S
#SSNT
#SSNT
#S
/
/



without external braking resistor
O
O
U
O
O
*
*
O
.
O
.
.
"
#SSNT
#S
#SPQU
#SSNT
#S
/
/



M
Br
= braking torque I
Br rms
= rms brake current
M
Br rms
= average braking torque t
A
= coast-down time
M
Br opt
= optimum braking torque n = speed
I
Br
= brake current n
rated
= rated speed
Con󹪝guration
5.4 Brake resistances (armature short-circuit braking)
1FK2 Synchronous Motors for SINAMICS S120
Con󹪝guration Manual, 02/2022, A5E46927724B AD 77