Residual hazards
3
Safety information
3.4
L
3.4-1
EDS82EV903-1.0-11/2002
3.4 Residual hazards
l 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.
l If you use the not-open-circuit protected 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.
l 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.
l The heat sink of the controller has an operating temperature of > 80°C:
– Direct skin contact with the heat sink results in burnings.
l All pluggable connection terminals must only be connected or
disconnected when no voltage is applied!
l 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!
l 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.
l 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.
Warnings!
l The device has no overspeed protection.
l Must be provided with external or remote overload protection.
l Suitable for use on a circuit capable of delivering not more than
5000 rms symmetrical amperes, 240 V maximum (240 V
devices) or 500 V maximum (400/500 V devices) resp.
l Use 60/75 °Cor75°C copper wire only.
l Shall be installed in a pollution degree 2 macro-environment.
Protection of persons
Controller protection
Motor protection
Controller/system protection
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