15
INSTALLATION AND MAINTENANCE
LSA 47.2 - 4 POLES
ALTERNATORS
SERVICING - MAINTENANCE
3742 en - 06.2007 / d
LEROY-SOMER
4.6.9 - Dismantling and reassembly of the
filters
- Remove the grille (417) then take out the filter (418). Change
the filter if necessary; please refer to section 4.2.5 for
cleaning the filter.
To replace, follow the instructions in reverse order.
4.7 - Installation and maintenance of
the PMG
For the LSA 47.2, the PMG reference is: PMG 2.
4.7.1 - Mechanical characteristics
The components are:
- a shaft adapter (to position the rotor on the alternator shaft).
- an M16 tie rod and nut for assembling the rotor on the shaft.
- a rotor with 16 magnets.
- an assembly of frame+wound plastic connection
plastic ferrules.
- the housing end plate (4 CBLXS M5 screws).
- 4 HM6 screws (for fixing the housing to the NDE shield).
If mounting in kit form, follow the instructions below.
1 - Remove the PMG cover [297] and the alternator NDE
shield seal (71).
2 - Mount the PMG housing assembly [290] on the shield
using the 4 HM6 screws.
3 - Apply anti-vibration adhesive to the tie rod [295] and
tighten it in the alternator shaft extension tapped hole to a
torque of 30 Nm.
4 - Mount the magnetised rotor on the shaft adapter, then
using 2 M10 threaded rods screwed into the rotor, slide the
assembly onto the tie rod.
5 - Once the rotor is in position, remove the 2 M10 rods.
6 - Install the cable gland washer [296].
7 - Lock the assembly with the M16 nut (torque of 116 Nm).
8 - Close the PMG with the cover [297].
9 - Remove the plastic plug on the NDE panel and fit the
plastic sheath and its ferrule.
10 - Connect the PMG to the AVR (section 4.7.2).
4.7.2 - Electrical connection
- Connect the 3 PMG wires (14/15/16), the 2 exciter wires (5/
6) and the above-mentioned 2 voltage sensing wires (2/3)
according to the connection diagram (see section 2.3.2).
Mounting the PMG on an AREP machine:
- Connect the 3 PMG wires (14/15/16), to terminals X1,X2,Z2
on the AVR. The 4 auxiliary winding wires X1.X2.Z1.Z2
should be isolated according to the current rules and
regulations. Both exciter field wires (5/6) and both voltage
sensing wires (2/3) remain in place.
Electrical characteristics of the PMG 2:
Stator phase/phase resistance 20 °C: 2.1
Ω
No-load A.C. voltage between phases at 1500 rpm: 125 V.
With the PMG, check that the ST9 jumper is open circuit.
After operational testing, replace all access panels
or covers.
418
417
51
WARNING
WARNING
