7
LEROY-SOMER
2011.01/ h
Installation and maintenance
LSA 46.2 - 4 POLES
ALTERNATORS
3856 en -
There are 2 possible methods for restoring
the above minimum values.
a) Dry out the machine for 24 hours in a
drying oven at a temperature of 110 °C
(without the regulator).
b) Blow hot air into the air intake, having
made sure that the machine is rotating with
the exciter îżeld disconnected.
Note : Prolonged standstill: In order to avoid
these problems, we recommend the use of
space heaters, as well as turning over the
machine from time to time. Space heaters
are only really effective if they are working
continuously while the machine is stopped.
Ensure that the alternator has the
degree of protection matching the
deîżned environmental conditions.
3.2.2 - Mechanical checks
Before starting the machine for the îżrst time,
check that:
- all îżxing bolts and screws are tight.
- the cooling air is drawn in freely.
- the protective grilles and housing are cor-
rectly in place.
Connection codes Voltage L.L Factory connection
L1(U)
N
L3(W)
T1
T7
T12
T10
T4
T9
T3
T6
T11
T5
T2
T8
L2(V)
A
3-phase
3-phase
Winding
60 Hz50 Hz
190 - 208 190 - 240
220
-
-
190 - 208
6
7
8
6
7
8
9
N
T1
T7
T12
T10
T4
T9
T3
T6
T11
T5
T2
T8
L1(U)
L3(W)
L2(V)
D
R 250 voltage detection :
0 => (T8) / 110 V => (T11)
R 450 voltage detection :
0 => (T3) / 220 V => (T2)
L1(U)
L2(V)
L3(W)
NDE
Winding
60 Hz50 Hz
380 - 415 380 - 480
440
600 500
-
-
380 - 416
R 250 voltage detection :
0 => (T8) / 110 V => (T11)
R 450 voltage detection :
0 => (T3) / 380 V => (T2)
NDE
L1(U)
L2(V)
L3(W)
N
T3
T2
T1
T11
T4
T12
T6
T10
T5
T7
T8
T9
N
T3
T2
T1
T11
T4
T12
T6
T10
T5
T7
T8
T9
In case of reconnection, ensure that AVR voltage detection is correct !
Winding 9 : R 450 voltage detection + transformer (See specific diagram AREP or SHUNT)
The factory can supply a set of flexible shunts and special connection links as an option for making these connections. (*).
- the standard direction of rotation is clock-
wise as seen from the shaft end (phase
rotation in order 1 - 2 - 3).
For anti-clockwise rotation, swap 2 and 3.
- the winding connection corresponds to the
site operating voltage (see section 3.3).
3.3 - Terminal connection diagrams
To modify the connection, change the
position of the stator cables on the terminals.
The winding code is speciîżed on the
nameplate.
3.3.1 - Terminal connection: 12 wire
The connection accessories are detailed in
section 5.3.3.
Any intervention on the alternator
terminals during reconnection or checks
should be performed with the machine
stopped.
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