Lenze EVF9333 - Manual (Page 126)

Safety instructions
Residual hazards
2
l
126 EDKVF9333V DE/EN/FR 7.1
2.3 Residual hazards
Protection of persons
ƒ Before working on the controller, check that no voltage is applied to the power
terminals:
– Because the power terminals V, W, +U
G
and −U
G
remain live for at least 3 minutes
after disconnecting from mains.
– Because the power terminals L1, L2, L3; U, V, W, +U
G
and −U
G
remain live when the
motor is stopped.
ƒ The leakage current to earth (PE) is >3.5 mA. According to EN 61800−5−1
– a fixed installation is required,
– a double PE connection is required, or, if there is only a single PE connection, the PE
conductor must have a cross−section of at least 10 mm 2 .
ƒ The heat sink of the controller has an operating temperature of > 80 °C:
– Contact with the heatsink results in burns.
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.
ƒ During parameter set transfer, the control terminals of the controller can have
undefined states!
– Therefore the plugs X5 and X6 must be unplugged, before the transfer is executed.
This ensures that the controller is inhibited and all control terminals have the
defined "LOW" state.
Device protection
ƒ Frequent mains switching (e.g. inching mode via mains contactor) can overload and
destroy the input current limitation of the drive controller:
– At least 3 minutes must pass between switching off and restarting the devices
EVF9321−xV and EVF9322−xV.
– At least 3 minutes must pass between two starting procedures of the devices
EVF9323−xV ... EVF9333−xV.
– Use the "safe torque off" safety function (STO) if safety−related mains
disconnections occur frequently. The drive variants Vxx4 are equipped with this
function.
Motor protection
ƒ Certain drive controller settings can overheat the connected motor:
– E. g. long−time operation of the DC injection brake.
– Long−time operation of self−ventilated motors at low speeds.