Lenze EVF9333−xV - Manual (Page 31)

Safety instructions
Residual hazards
2
2.3
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2.3−1 EDSVF9333V EN 6.2−04/2012
2.3 Residual hazards
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 and −UG still carry dangerous
voltage for at least 3 minutes after power−off.
– the power terminals L1, L2, L3; U, V, W, +UG and −UG carry dangerous
voltage when the motor is stopped.
ƒ Before power−off during DC−bus operation, all controllers must be
inhibited and 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 2 .
ƒ The controller can only be safely disconnected from the mains via a
contactor on the input side.
ƒ During parameter set transfer the control terminals of the controller
can have undefined states.
– Therefore the connectors X5 and X6 must be disconnected from the
controller before the transfer takes place. This ensures that the
controller is inhibited and all control terminals have the defined state
"LOW".
ƒ If you use the "flying−restart circuit" function (C0142 = 2, 3) for
machines with a low moment of inertia and minimum friction:
– After controller enable in standstill, the motor may start or change its
direction of rotation for a short time, because the flying restart
process also is carried out at a speed of 0.
Protection of persons