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gefran BDI50 Series User Manual page 25

Compact v/f & sensorless inverter

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Typical Wiring
L1(L)
L3(N)
E
3
L1(L) L3(N) E
2
T1 T2 T3
3
4
5
1
Drive
E
6
7
PE
8
M
1.Protective Earth Conductor.
Conductor size for enclosure &
Backplate must comply with the local electrical
standards. Min 10mm².
2.Backplate. Galvanised steel (Unpainted).
3.Input / output Ferrite core and reactor.
Ferrite cores can be used to reduce
radiated noise due to long motor cables.
If ferrite core is used loop wires round the core
(see table 3-2). Install core as close to the
inverter as possible
Output reactors provide additional benefit of
reducing dv/dt for protection of motor windings.
4. Metal Cable clamp. no more than 150mm from
the inverter.
Note: If no enclosure & backplate is used then
connect the cable shield by a good 360 º
termination to the Inverter output terminal E.
5.Screened (Shielded four core cable).
6.Separate Protective Earth wire, routed outside
motor cable separated be at least 100mm.
Note:- this is the preferred method specially
for large output cables and long length.
Multi-core screened (3 core & protective
earth) can be used for small power and short
length.
7.Connect the cable shield by a good
360º termination and connect to the motor
protective earth terminal.
This link must be as short as possible.
8.Motor Earth terminal(Protective Earth).
3-15

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