Residual Hazards - Lenze 8200 vector series Manual

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Residual hazards, Layout of the safety instructions

Residual hazards

Protection of persons
Before working on the controller check that no voltage is applied to the power terminals, the
relay output and the pins of the FIF interface,
– because the power terminals U, V, W, +UG, -UG, BR1 and BR2 remain live for at least 3
minutes after mains switch-off.
– because the power terminals L1, L2, L3; U, V, W, +UG, -UG, BR1 and BR2 remain live when
the motor is stopped.
– because the relay outputs K11, K12, K14 can remain live when the controller is
disconnected from the mains.
If you use the non-fail safe function "Selection of direction of rotation" via the digital signal
DCTRL1-CW/CCW (C0007 = 0 ... 13, C0410/3 ≠ 255):
– In the event of an open circuit or failure of the control voltage, the drive can change its
direction of rotation.
If you use the function "Flying-restart circuit" (C0142 = 2, 3) with machines with a low moment
of inertia and a minimum friction:
– After controller enable in standstill, the motor can start for a short time or change its
direction of rotation for a short time.
The heatsink of the controller has an operating temperature of > 80°C:
– Direct skin contact with the heatsink results in burnings.
Controller protection
All pluggable connection terminals must only be connected or disconnected when no voltage
is applied!
Cyclic connection and disconnection of the supply voltage can overload and destroy the
input current limitation of the controller:
– In case of cyclic mains switching over a longer period of time three minutes have to pass
between two starting operations!
Motor protection
Depending on the controller settings, the connected motor can be overheated:
– For instance, longer DC-braking operations.
– Longer operation of self-ventilated motors at low speed.
Controller/ system protection
Drives can reach dangerous overspeeds (e.g. setting of inappropriately high field
frequencies):
– The controllers do not offer any protection against these operating conditions. For this, use
additional components.
Safety information
EDBEMV82EV EN 3.0
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