Lenze EVF9333−xV - Manual (Page 83)

Wiring of the standard device
Important notes
Device protection
5
5.1
5.1.2
l
5.1−3 EDSVF9333V EN 6.2−04/2012
5.1.2 Device protection
ƒ In the event of condensation, only connect the controller to the mains
voltage after the humidity has evaporated.
ƒ The controller is protected by external fuses.
ƒ Drive controllers EVF9324−xV, EVF9326−xV and
EVF9328−xV ... EVF9333−xV must only be operated with assigned mains
choke / mains filter.
ƒ Length of the screws for connecting the shield sheet for the control
cables: 12 mm.
ƒ Provide unused control inputs and outputs with terminal strips. Cover
unused Sub−D sockets with protective covers included in the scope of
supply.
ƒ Switching on the motor side of the controller is only permissible for
safety shutdown (emergency−off).
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.
5.1.3 Motor protection
ƒ Extensive protection against overload:
– By overcurrent relays or temperature monitoring.
– We recommend the use of PTC thermistors or thermostats to monitor
the motor temperature.
– PTC thermistors or thermostats can be connected to the controller.
– For monitoring the motor, we recommend the use of the I
2 xt
monitoring.
ƒ Only use motors with an insulation suitable for the inverter operation:
– Insulation resistance: min. û = 1.5 kV, min. du/dt = 5 kV/
ms
– When using motors with an unknown insulation resistance, please
contact your motor supplier.