Residual Hazards Of Lenze Controllers - Lenze 8200 vector Instructions De Montage

Residual hazards of Lenze controllers

Protection of persons
ƒ According to their enclosure, Lenze controllers (frequency inverters, servo inverters, DC speed
controllers) and their components can carry a voltage, or parts of the controllers can move or
rotate during operation. Surfaces can be hot.
– If the required cover is removed, the controllers are used inappropriately or installed or
operated incorrectly, severe damage to persons or material assets can occur.
– For more detailed information please see the documentation.
ƒ There is a high amount of energy within the controller. Therefore always wear personal
protective equipment (body protection, headgear, eye protection, ear protection, hand guard)
when working on the controller when it is live.
ƒ Before working on the controller, check if no voltage is applied to the power terminals.
– the power terminals U, V, W, +UG, −UG, BR1 and BR2 still carry dangerous voltage for at
least 3 minutes after power−off.
– the power terminals L1, L2, L3; U, V, W, +UG, −UG, BR1 and BR2 carry dangerous voltage
when the motor is stopped.
– the relay outputs K11, K12, K14 can carry dangerous voltage when the drive controller is
disconnected from the mains.
ƒ The discharge current to PE potential is > 3.5 mA. In accordance with EN 61800−5−1
– a fixed installation is required.
– the design of the PE conductor has to be double or, in the case of a single design, must have
a cable cross−section of at least 10 mm
ƒ The controller can only be safely disconnected from the mains via a contactor on the input
side.
ƒ Controllers can cause a DC current in the PE conductor. If a residual current device (RCD) or a
fault current monitoring unit (RCM) is used for protection in the case of direct or indirect
contact, only one RCD/RCM of the following type can be used on the current supply side:
– Type B for the connection to a three−phase system
– Type A or type B for the connection to a single phase system
Alternatively another protective measure can be used, like for instance isolation from the
environment by means of double or reinforced insulation, or isolation from the supply system by
using a transformer.
ƒ If you use the Selection of direction of rotation" function via the digital signal
DCTRL1−CW/CCW (C0007 = 0 ... 13, C0410/3 ¹ 255):
– In the event of an open circuit or failure of the control voltage, the drive can change its
direction of rotation.
ƒ If you use the function "flying restart circuit" (C0142 = 2, 3) for machines with a low moment
of inertia and low friction:
– After controller enable at standstill, the motor can start for a short time or change its
direction of rotation for a short time.
EDK82EV113 DE/EN/FR 11.0
Safety instructions
Residual hazards of Lenze controllers
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