Brakes - Lenze g500-B Manual

Brakes

CAUTION!
They may not be used as safety elements (particularly with hoist axes) without additional
measures being implemented.
The brakes used are not fail-safe brakes in the sense that prospective disruptive factors, e.g.
oil ingress, can lead to a reduction in torque!
▶ The brakes must only be used as holding brakes for holding the axes at a standstill 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 can be overheated and destroyed by the motor continuing to rotate.
Motor supply cables
If long motor supply cables are used, pay attention to 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:
[V]
= +
U[V] U [V] 0.08
B
[A] [m] ´
NOTICE
▶ The brakes become active when the supply voltage has been switched off (closed-circuit
principle).
▶ When using the brakes purely as holding brakes, virtually no wear occurs on the friction
surfaces.
▶ 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.
NOTICE
In case of these permanent magnet brakes, the rated torque applies solely as holding torque
at standstill.
▶ Emergency stops at higher speeds are possible but high switching energy increases wear on
the friction surfaces and the hub.
▶ During braking from full motor speed, e .g. in the event of emergency stops, the braking
torque is significantly reduced.
U V
´ ´
l [m] I [A]
Lg B U V
B
l m
Lg
I A
B
Resulting supply voltage
Rated voltage of the brake
Cable length
Rated current of the brake
Product extensions
Brakes
135