Wiring On The Motor Side - Lenze 8200 vector series Manual

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Wiring according to EMC
Always observe these basic rules
3.1.6

Wiring on the motor side

Measures for suppressing the interfering radiation depend on the length and design of the motor
cable. The following table provides an overview of the required RFI measures:
Radio interference suppression
RFI filter
Motor filter
Motor interference
suppression module
Measure is required
( ) Check measure in case of EMC interferences
1)
Interfering radiation is not considered
2)
Operation is only permissible with a switching frequency of 8 kHz, U/f characteristic control, maximum output frequency 480 Hz
Comply with the specification of the motor cable
Use shielded low-capacitance motor cables only:
Requirements on the motor cable capacitance
Capacitance per unit length
Core/core
Core/shield
The motor must be designed for a rated voltage of > 500 V AC (test voltage 2 kV AC).
The maximum permissible motor cable length amounts to 50 m without external measures
(e.g. motor filter)
Connect the shield of the motor cable correctly
Always connect the motor cable shield to both sides - controller and motor.
Shield connection to the controller/control cabinet
– Connect the shield with a large surface to the EMC shield sheet using a shield clamp.
– For this purpose use the enclosed shield clamp.
– Continue the shield after the shield clamp to the terminals of the inverter or the clamping
point. Do not exceed an unshielded cable length of 40 mm.
– In addition, it is recommended to connect the shield to PE (see
Shield connection at the motor
– Connect the shield at the motor terminal box with EMC cable glands.
12
up to 50 m
Continuous shield Interrupted shield
— —
— ( )
Note!
The motor cable is highly susceptible to interferences. Hence the following applies:
The motor cable must not contain any further cables (e.g. for brake control,
separate fans etc.).
One exception is the temperature monitoring cable of the motor.
2
mm
AWG
[pF/m]
[pF/m]
EDBEMV82EV EN 3.0
Motor cable length
shielded
2)
50 ... 100 m
Continuous shield Interrupted shield
— ( )
Cable cross-section
1 1.5
18 16
< 75
1)
unshielded
up to 100 m 100 ... 200 m
—
( ) ( )
2.5 4
12 10
< 100
< 150
in Fig. 2).
l
2)
6
10