Lenze E82MVxxx_4Bxxx - Manual (Page 74)

Safety instructions
Residual hazards
2
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74 EDK82MV752 DE/EN/FR 7.1
2.3 Residual hazards
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 Disconnect the controller from the supply before you start working on it/open it,
and wait for at least 1 minute since the power terminals U, V, W, BR0, BR1, BR2 and
the pins of the FIF interface remain live after power−off.
– After opening the motec, check if the power terminals L1, L2 or (L2/N), L3, U, V, W,
BR0, BR1, BR2, the relay outputs K11, K12, K14 or the electronic switching output
K12 (option, depending on the device version) and the pins of the FIF interface are
dead.
– Even if the controller is disconnected from the mains, the relay outputs K11, K12,
K14 or the electronic switching output K12 (option, depending on the device
version) can be live!
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 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