14
.. These
are use variety applications and
the technique has proved highly reliable for
over years. At
rated speed, the machine automatically
synchronised the power system and the
circuit-breaker for direct connection the
supply closed. The motor excited from
standstill. These problems can overcome
with the aid solid-state «soft» starting
equipment which for this reason being used
in increasing number applications.
Typical applications
Starting of
• gas turbines
• synchronous compensators
• refiner motors
• motor/generators pump storage
power plants
• large compressors and blowers for:
chemical processes
wind tunnels
blast furnaces
References
World-wide, ABB has installed more than
360 solid-state converters starters with
ratings between and MW.MEGADRIVE-LCI.8
Rated power: 3.8 MW
Main features
• starting current limited the rated
machine current less
• provides facility for braking the machine
• sequential starting several machines
possible with single soft starter
• microprocessor control system
Technical data
Typical power range: .ST
Starter for synchronous machines
Starting large synchronous machine on-line
can prove problematical either because of
the inrush current because the thermal
stress hot spots the rotor surface while
running up.
Gas turbine starting
converter Type LCI.ST 3. MW
Maximum speed: 3600 rpm (+5 %)
Output frequency: (+5%)
Operation
The synchronous machine started with
a variable frequency the converter in
the same way converter-fed variable
speed motor (see MEGADRIVE LCI).
