Lenze EMB9352-E

Technical data
Rated data
Operation with brake chopper EMB9352: Maximum running times
4

67
EDBMB935X DE/EN/FR 11.0
4.2.2 Operation with brake chopper EMB9352: Maximum running times
 Stop!
Failure of the brake chopper or the brake resistor if the maximum
running times are exceeded.
If the maximum running time of the brake chopper or the brake
resistor are exceeded, the components will be overloaded.
Possible consequences:
ƒ The components fail.
Protective measures:
ƒ Always implement the temperature monitoring of the brake
resistor into the emergency stop chain.
ƒ Comply with the running time t
on
and dead time t
off
of the brake
resistor.
–t
on,max
= Q
B
/(V
2
/R
B
), t
on,max
+ t
off
= Q
B
/P
D
–Q
B
, R
B
, P
D
: see technical data of the brake resistor.
ƒ Operation with brake resistor R
B
< 54 W:
– Comply with the running time t
on
and dead time t
off
of the
brake chopper.
–t
on
+ t
off
= 3 s ( Fig. 1).