Connecting Voltage To Igbt Supply Unit - ABB ACS 600 User Manual

Connecting Voltage to
IGBT Supply Unit
WARNING! When connecting voltage to the IBGT supply unit, the DC busbars will
become live, as will all the inverters connected to the DC busbars.
Make sure that it is safe to connect voltage to the IBGT supply unit. Ensure that:
• Nobody is working with the unit or circuits that are wired from outside into the
cabinets.
• All cabinet doors are closed.
1. First Voltage Switch-on for the IGBT Supply Unit
If the supply section is equipped with an air circuit breaker,
set the air circuit breaker current settings to 50% of the on-
load values.
Ensure that all cabinet doors are closed.
Be ready to trip the main breaker of the supply transformer if
anything abnormal occurs.
Close the main disconnecting switch of the supply section.
Close the main contactor / air circuit breaker of the supply
section.
2. Air Circuit Breaker Current Settings
Increase the air circuit breaker current settings to the on-
load values.
ACA 635 IBGT Supply Sections
Chapter 4 – Commissioning the Supply Section with ISU
This table describes how to connect voltage to the IGBT supply unit
and the DC busbars for the first time.
Action Information
It is recommended to set relatively low
current values at the first voltage switch-
on.
4-5