GTS BG 132, Installation And Operating Manual

Page: 17 / 128

Page 17 Issue 05/2013
Description
General functions
4.2 General functions
These generator series are self-excited synchronous inner-pole generators.
The generator comprises a functional group consisting of the main machine,
exciter machine and, on brushless generators, co-rotating rectifiers. These
groups are housed together in one housing. The electronic generator
controller can be housed in a terminal box attached to the generator or in an
external switch box.
The generators are extremely resistant to unbalanced loads due to
constructive measures such as a damping cage and balanced controller.
4.3 Generator
4.3.1 Function
y
The generators are electronically controlled, self-excited inner-pole
generators, in brush and brushless versions.
y
The voltage supplied by the generator is regulated by the built-in
electronic generator controller so that the output voltage between idle
speed and the nominal load meets the requirements of DIN EN 60038.
This equates to a quality standard which is comparable with the public
electricity supply network. The constancy of the output frequency is
dependent on the speed constancy of the drive unit. The frequency is
synchronous to the drive speed.
y
If the generator sustains a temporary overload (below the actuation
time of the protective circuit breaker) or if devices are connected to the
generator with excessive power draw or excessive start-up power draw,
the generator controller will automatically restrict the power output (by
reducing the exciter field current) and reduce the output voltage.
y
The generators meet the EMC directives DIN EN 13309/DIN EN 55014 and
other EMC standards referenced in these norms.
y
The generators are cooled by self-ventilation independent of the direction
of rotation. The cooling air is drawn through the cooling profiles by the fan
wheel on the rear side of the generator and across the housing, towards
the front side.