High Power Supply - ABB ACA 6 Series Hardware Manual

High Power Supply

Busbar connection
L1 L2 L3 N
Cable Bus System
L1
L3 L2 L3 L2
L1 L2 L3 L1
N
It is recommended to arrange the cables as
shown alongside to achieve a current
distribution as accurate as possible. Air
between cables is required for cooling.
ACA 6xx Sections and ACS/ACC 6x7 (132 to 3000 kW) Frequency Converters
A high current (> 300 A) busbar connection is represented below.
Transformer
L1
L2
L3
N
PE
Factory main earthing bus
Note: The paint should be removed to allow a good connection to the cabinet frames
throughout the whole perimeter of the metal conduit (or a bus duct). The metal conduit
(or the bus duct metal) should be electrically continuous throughout its complete
length.
The connection of a high current (> 300 A) cable bus system that
consists of several cables is represented below. In this system, less
conductor material is needed due to better cooling of separate
conductors.
L1
L1
L3 L2
L3 L2 L3
L2 L1
N
Note: Current derating of the cables is required when installing the cables in a cable
tray. This derating factor must be taken into account as per the local electrical safety
codes.
Metal conduit (shield)
Converter
L1
L2
L3
1)
PE
Transformer
L1
L2
L3
N
N
PE
Factory main earthing bus
Chapter 3 – Electrical Installation
1) Connect the metal
conduit of the busbar
system (or the metal of
the bus duct) to PE at
either one end or both
ends.
Converter
L1
L2
L3
PE
3-11