Synchronous Generators BG 132 and BG 160

Synchronous Generators BG 132 / BG 160
Chapter 4: 4.7 Installation of two-bearing generators (BG 160)
4.7.2 Minimum clearances and regulations for cooling (BG 160)
In order to provide sufficient cooling the generator needs adequate ventilation.
The cooling air is sucked on the rear side by the fan impeller and then blown to
the front side through the cooling profiles along the housing. If necessary,
adequate openings for cooling air inlet and outlet have to be provided.
It is absolutely important to observe the following regulations for minimum
clearances and cooling.
Minimum clearances (BG 160)
The following minimum clearances towards
parts or walls have to be observed for
a
installation (see also the accompanying
a
a
figures on the right):
b
• Both sides and top: a = 100 mm
• Front side: b = 300 mm
• Rear side: c = 200 mm
Cooling (BG 160)
It is absolutely important to observe the
b
following regulations for cooling. Danger
of overheating!
P max = 4 Pa
The temperature of the supplied cooling air
must not exceed 40 °C.
In the cooling air intake area on the rear
P max = 7 Pa
side of the generator a maximum partial
vacuum of P max = 4 Pa may arise.
c
Otherwise the fan impeller cannot suck
enough cooling air.
In the cooling air blow out area on the
front side of the generator a maximum
overpressure of P max = 7 Pa may arise.
Otherwise the circulation of the cooling air
is not sufficient.
Cooling air circulation must not be
impaired by other air flows (e.g.
directed from the side or from the front
to the generator).
Issue date: August 2002 63