Motor Cable Connection - ABB ACA 6 Series Hardware Manual

Motor Cable
Connection
L1
L3
L2
Concentric Al/Cu-shield
Drive Section
PE
U2 V2 W2
Factory main
earth bus
V1
U1
PE
M
3 ~
ACA 6xx Sections and ACS/ACC 6x7 (132 to 3000 kW) Frequency Converters
Motor cable connections for different cable types are represented
below. For minimum radio frequency interference (RFI) at the motor
end, earth the cable screen 360 degrees at the lead-through or earth
the cable by twisting the screen (flattened width > 1/5 · length).
Concentric Al/Cu-shield and
steel or aluminium armour
Factory main
earth bus
W1
L1
L3
L2
Drive Section
PE
U2 V2 W2
V1
U1
W1
PE
M
3 ~
Chapter 3 – Electrical Installation
Separate protective
conductor
Galvanised steel or
copper armour
Drive Section
PE
Factory main
earth bus
Separate protective
conductor
A separate PE conductor system is used
only if local safety regulations do not
allow earthing of the ACx 600 and the
motor merely through the cable screen.
This solution increases motor bearing
currents compared to symmetrical
shielded cable, thus causing extra wear.
L1
L3 L2
U2 V2 W2
V1
U1
W1
PE
M
3 ~
3-13