Lenze g500-B - Product Extensions

Brakes
Oponally the mot
ors can be ordered with a spring-applied brake as holding brake.
CAUTION!
They may not be used as safety elements (parcularly with hois
t axes) without addional
measures being implemented.
The brakes used are not fail-safe brakes in the sense that prospecve disrupve factors, e.g.
oil ingress, can lead to a reducon in torque!
▶
The brakes must only be used as holding brakes for holding the axes at a standsll or in the
deenergised state.
▶
The brake must not be used as a service brake.
CAUTION!
If no suitable voltage (incorrect value, incorrect polarity) is applied to the brake, the brake will
be applied and c
an be overheated and destroyed by the motor connuing to rotate.
If long motor supply cables are used, pay aenon t
o the ohmic voltage drop along the cable
and compensate for it with a higher voltage at the input end of the cable.
The following applies to Lenze system cables:
= + ´ ´
´
B Lg B
[V]
U[V] U [V] 0.08 l [m] I [A]
[A] [m]
V V Resulng supply v
oltage
U
B
V Rated voltage of the brake
l
Lg
m Cable length
I A Rated current of the brake
NOTICE
▶
The brakes become acv
e when the supply voltage has been switched o (closed-circuit
principle).
▶
When using the brakes purely as holding brakes, virtually no wear occurs on the fricon
surfaces.
▶
The fricon surfaces must always be free from oil and grease because even small amounts
of grease or oil will considerably reduce the braking torque.
NOTICE
In case of these permanent magnet brakes, the rated torque applies solely as holding torque
a
t standsll.
▶
Emergency stops at higher speeds are possible but high switching energy increases wear on
the fricon surfaces and the hub.
▶
During braking from full motor speed, e .g. in the event of emergency stops, the braking
torque is signicantly reduced.
Product extensions
Br
akes
117