Residual Hazards - Lenze E84AVSC Operating Instructions Manual

2.3

Residual hazards

Protection of persons
Before working on the controller, check if no voltage is applied to
the power terminals because
• - depending on the device - the power terminals U, V, W, +UG,
- UG, Rb1 and Rb2 remain live for at least 3 ... 20 minutes after
disconnecting the mains.
• the power terminals L1, L2, L3; U, V, W, +UG, - UG, Rb1 and
Rb2 remain live when the motor is stopped.
Device protection
Connect/disconnect all pluggable terminals only in deenergised
condition!
Detach the controller from the installation, e.g. from the rear
panel of the control cabinet, only in deenergised condition!
Motor protection
With some settings of the controller, the connected motor can be
overheated.
• E.g. longer operation of the DC injection brake.
• Longer operation of self-ventilated motors at low speed.
from Firmware V06.00 - DMS 1.1 EN - 11/2011
8400 StateLine C | Operating instructions
Protection of the machine/plant
Drives can reach dangerous overspeeds (e. g. setting of high
output frequencies in connection with motors and machines not
suitable for this purpose)! The drive controllers do not provide
protection against such operating conditions. For this purpose,
use additional components.
Switch contactors in the motor cable only if the controller is
inhibited. When switching contactors in the motor cable while
the controller is enabled, you can activate monitoring functions
of the controller. If no monitoring function is activated,
switching is permissible.
Parameter set transfer
During the parameter set transfer, control terminals of the
controllers can adopt undefined states! Therefore it is required
to disable the terminal X4 (digital input signals) before the
transfer starts. This ensures that the controller is inhibited and
all control terminals have the firmly defined "LOW" status.
L
Safety instructions
Residual hazards
9