Dismantling Format Sae; Tightening Torques; Connections And Earthing; Preliminary Controls - Sincro SK315-Serie Bedienungs- Und Wartungsanleitungen

6.2.2 Dismantling format SAE

For dismantling follow in reverse the instructions given at
section 6.2.1.
Be sure that the transit bar that holds rotor
in position is placed before any transport of
the generator.
WARNING!

6.2.3 Tightening torques

For mechanical connections it is recommended to use
screws at least class 10.9
The tightening torques are shown in the following table:
TIGHTENING TORQUES (Nm)
Electrical
Screw Type connections
Steel (8,8)
M5 5,9
M6 10
M8 25
M10 49
M12 85
M16 210

6.3 Connections and earthing

Electrical connections have to be done with cables with
sections suitable for the nominal current values and
distances.
Not correct cables or connections not
properly done, can cause dangerous
overheating.
WARNING!
Refer to following drawing:
The generator housing has to be connected to earth on the
base of the generating set. If flexible antivibration dampers
are mounted between the generator housing and its base,
an earth conductor should be connected in parallel through
the flexible support and be adequately sized (usually half
the section of the main line cables).
By the feet on the housing there is an M10 threaded hole to
simply earthing of the housing (see figure) for SK315/355
and M12 for SK400/450 - SK500 series.
Make sure the earthing procedure is carried
out properly.
WARNING!
24

6.4 Preliminary controls

Mechanical
connections

6.4.1 Control of electrical insulation

Steel (10,9)
Before starting up the generating set or after long
8,7
shutdowns, check the insulation resistance of the windings
15
to earth.
36
72
125
CAUTION!
310
The results must be over 2M Ohm. If this is not the case,
the alternator alone should be oven dried at 80 - 100°C
for 6 hours.
Before carrying out this operation remove the voltage
regulator and the emc filter.
IMPORTANT!

6.4.2 Direction of rotation

The generators are designed for with clockwise rotation,
viewed from the coupling side (unless otherwise specified
on order) to produce a U-V-W phase sequence (according
to IEC 60034-8). If rotation has to be reversed after
delivery ask the Sincro Technical Office for the relevant
wiring diagrams.
The generators are supplied with an unidirectional fan.
EARTHING POSITION
Disconnect the AVR (voltage regulator)
before carrying out this test.
The windings are tested under high voltage
during production. Additional high-voltage
tests can weaken the insulation thereby
reducing the working lifespan. If a high-
voltage test should prove necessary for
customer approval, these tests should be
carried out at lower voltages.