Lenze EVF9333 - Manual (Page 159)

Electrical installation
Important notes
5
l
159 EDKVF9333V DE/EN/FR 7.1
5 Electrical installation
5.1 Important notes
(
Stop!
The drive controller contains electrostatically sensitive components.
The personnel must be free of electrostatic charge when carrying out assembly
and service operations.
)
Note!
An earth−leakage circuit breaker between the supplying mains and the
controller can be activated by mistake ...
ƒ by capacitive compensation currents of the cable shields during operation
(especially with long, shielded motor cables),
ƒ by simultaneous connection of several controllers to the mains supply,
ƒ if additional interference filters are used.
5.2 Installation according to EMC (installation of a CE−typical drive system)
ƒ Connect all components (drive controller, choke, filter) to a central earthing point
(PE rail).
Mains connection, DC supply
ƒ If a mains filter or RFI filter is used, install a shielded cable between mains filter or
RFI filter and drive controller if it is longer than 300 mm.
ƒ For DC−bus operation or DC supply, use shielded cables.
Motor cables
ƒ Use only shielded motor cables with braid made of tinned or nickel−plated copper.
Shields made of steel braid are not suitable.
– The overlap rate of the braid must be at least 70 % with an overlap angle of 90 °.
ƒ Always connect the shield of the motor cable at both sides − at the drive controller
and at the motor.
– Always connect shields with a surface as large as possible to the conducting and
earthed mounting plate. Also use the shield connections on the device.
ƒ The motor cable is perfectly installed if
– it is routed separately of mains cables and control cables,
– it crosses mains cables and control cables only at a right angle,
– it is not interrupted.