Synchronous Generators BG 132 and BG 160

Synchronous Generators BG 132 / BG 160
Chapter 2, Description
2.3 General functionality
All generators of these series are self-excited synchronous inner-pole generators.
The generator consists of the functional groups main machine, exciter and
rotating rectifier mounted in a common housing. The electronic generator
governor can be placed in a terminal box mounted on the generator, an external
control box or in the optional control box mounted on the generator instead of
the terminal box.
Due to various constructional measures, an amortisseur and a balancing control
the generators have an extreme asymmetric load capability.
Cooling of the generators is performed by a rotating direction-independent selfventilation.
For this purpose, the cooling air is sucked on the rear side by a fan
impeller and then blown to the front outside along the generator.
The supplied generator voltage is regulated by the electronic generator governor,
so that the output voltage fulfills the requirements of IEC 38 for the entire range
between no-load and rated load condition. This corresponds to the quality
standard of the public electricity supply network. The output frequency
constancy depends on the speed constancy of the engine.
In case of short generator overload conditions (below the reaction time of the
circuit breakers) or if devices with a too high power consumption or a too high
starting power are connected to the generator, the generator governor
automatically limits the output power (by limiting the exciter field current) and
reduces the output voltage.
Optionally an expanded generator governor with no-load automatic is available.
Further information about the generator governor can be found in section 2.4 on
page 17.
If the generator is not equipped with the option "Insulation monitoring with
switching-off", it fulfills the protective measure "Protection separation with
equipotential bonding" according to VDE 0100 part 728. The used power system
is the IT system with neutral conductor N and equipotential bonding conductor
PE (see Figure 1).
If the generator is equipped with the option "Insulation monitoring with
switching-off", it fulfills the better protective measure "Protection separation
with insulation monitoring" according to VDE 0100, part 728.
The generators of this series comply with the EMC regulations EN ISO 14982, ISO
TC 127 / ISO FDIS 13766 / DIN EN 13909 and further EMC regulations referenced
in these regulations.
Issue date: August 2002 15