High Power Applications; Parallel Connected Inverters - ABB ACA 6 Series Hardware Manual

Chapter 3 – Electrical Installation
High Power
Applications
Parallel Connected
Inverters
3-14
Motor cable connections with parallel symmetrical cables are
represented below.
Motor cable connections with parallel connected inverters are
presented below. Parallel connected cables are drawn as single cables
to simplify the drawings.
Requirements for parallel connected cables and cables for motors with
two separate windings are given as follows:
• The maximum allowed difference in cable length is 5 % i.e. the
length of the longest cable divided by that of the shortest cable
must be less than or equal to 1.05: l
• Cables must be of the same type and have equal cross-sectional
areas.
ACA 6xx Sections and ACS/ACC 6x7 (132 to 3000 kW) Frequency Converters
Inverter
OUTPUT
U2
V2
W2 PE
1 2 3 1 2 3 1 2 3
1 2 3 1 2 3
1 2 3
V1
W1
U1
~
3
M
/l < 1.05.
max min