ABB EL3040 Gas Detection Controller Unit
Chapter 5 – Parameters for 12 – Pulse Operation
This chapter gives information about the list of parameters for
6 - pulse operation with DCS 600 (included in the separate Software Description DCS 600). As far as special parameters for
12 – pulse operation with DCS 600 are concerned please refer
to the corresponding Chapters within this manual.
Chapter 6 – Start–Up Instructions
This chapter provides detailed information on how to start up the
different 12 – pulse configurations with thyristor power converters of
the DCS 600 series.
Target group This manual is designed to help those who are responsible for
planning, installing, starting up and servicing the thyristor power
converter.
These people should possess
• basic knowledge of physics and electrical engineering, electrical
wiring principles, components and symbols used in electrical engineering
• basic experience with DC drives and products.
Associated
publications
The DCS 600 documentation includes the following:
- System Descriptions DCS 600
- Technical Data DCS Thyristor Power Converters
- Operating Instructions DCS 600 MultiDrive
- Software Description DCS 600
- Installation Manual “DC Enclosed Converters in DriveMNS-Cabinets: DCA 600, DCS 500B, DCV 700, DCF 700”
- Service Manual DCS 500 and DCS 600
- This brochure.

Definition of 12 – pulse
technology
The characteristic features of the 12 – pulse technology are:
• a DC drive comprising two 6 – pulse thyristor converters;
• a 12 – pulse line transformer providing the AC power for both
converters from separated transformer secondary windings
whose phase positions differ by 30°. An example for such a
transformer configuration is ∆ / / ∆ .
Advantages of
12 – pulse technology
The most significant advantages of 12 – pulse technology are:
• Reduced level of harmonics on the AC side for 12 – pulse
parallel and serial configurations
Configuration Harmonics
6 – pulse 5th; 7th; 11th; 13th; 17th; 19th; 23rd; 25th; ..
12 – pulse 11th; 13th; 23rd; 25th; ..
• Extension of the power range by doubling the converter out put current (⇒ parallel config.) or voltage (⇒ serial config.).
• Possibility of an emergency operation with one converter in
•
case of a breakdown in the other converter.
Improvement of the motor efficiency due to reduced DC cur rent ripple.
2.1 Types of 12 – pulse configurations
ABB offers different types of 12 – pulse configurations:
12 – pulse parallel
configuration
In this 12 – pulse parallel configuration the motor gets the sum of
the DC current of two converters. Thus the current is doubled.
An emergency operation is possible with full armature voltage and
with 50 % of the former maximum torque.