044L - LEORY SOMER ALTERNATOR - en

TAL 044
Low Voltage Alternator - 4 pole

Installation and maintenance
Electric Power Generation Installation and maintenance 5226 en - 2022.12 / s
TAL 044
This manual concerns the alternator which you have just purchased.
We wish to draw your attention to the contents of this maintenance manual.
SAFETY MEASURES b) Do not allow children younger than 14

Before using your machine for the first time, to go near the air outlet guards.
it is important to read the whole of this A set of self-adhesive stickers depicting the
installation and maintenance manual. various warning symbols is included with
All necessary operations and interventions this maintenance manual. They should be
on this machine must be performed by a positioned as shown in the drawing below
qualified technician. once the machine has been fully installed.
Our technical support service will be pleased
to provide any additional information you WARNING
may require.
The alternators must not be put into
The various operations described in this
service until the machines in which they
manual are accompanied by
are to be incorporated have been
recommendations or symbols to alert the
declared compliant with EC Directives
user to potential risks of accidents. It is vital
plus any other directives that may be
that you understand and take notice of the
applicable.
following warning symbols.
This manual is to be given to the end
user.
WARNING The range of electric alternators and
Warning symbol for an operation capable their derivatives, manufactured by us or
of damaging or destroying the machine on our behalf, comply with the technical
or surrounding equipment. requirements of the customs Union
directives.
The alternator is a sub-assembly
delivered without a system of protection
against short-circuits. The protection
must be provided by the circuit-breaker
Warning symbol for general danger to of the generator, sized to interrupt the
personnel. fault current.
© 2022 Moteurs Leroy-Somer SAS

Share Capital: 38,679,664 €, RCS Angoulême
338 567 258.
Warning symbol for electrical danger to We reserve the right to modify the characteristics
personnel. of this product at any time in order to incorporate
the latest technological developments. The
SAFETY INSTRUCTIONS information contained in this document may
therefore be changed without notice.
We wish to draw your attention to the This document may not be reproduced in any
following 2 safety measures which must be form without prior authorization.
complied with: All brands and models have been registered and
a) During operation, do not allow anyone patents applied for.
to stand in front of the air outlet guards,
in case anything is ejected from them.
2
TAL 044
CONTENTS
1 - RECEIPT............................................................................................................................4
1.1 - Standards and safety measures...................................................................................4
1.2 - Inspection.....................................................................................................................4
1.3 - Identification................................................................................................................. 4
1.4 - Storage........................................................................................................................4
1.5 - Applications.................................................................................................................. 4
1.6 - Usage restrictions........................................................................................................ 4
2 - TECHNICAL CHARACTERISTICS....................................................................................5
2.1 - Electrical characteristics...............................................................................................5
2.2 - Mechanical characteristics...........................................................................................5
3 - INSTALLATION................................................................................................................ 11
3.1 - Assembly.................................................................................................................... 11
3.2 - Checks prior to first use..............................................................................................12
3.3 - Terminal connection diagrams....................................................................................12
3.4 - Commissioning.......................................................................................................... 15
3.5 - Setting up...................................................................................................................15
4 - SERVICING - MAINTENANCE.........................................................................................16
4.1 - Safety measures........................................................................................................ 16
4.2 - Routine maintenance.................................................................................................16
4.3 - Bearings.....................................................................................................................17
4.4 - Mechanical defects....................................................................................................17
4.5 - Electrical faults........................................................................................................... 18
4.6 - Dismantling, reassembly............................................................................................20
4.7 - Installation & maintenance of the PMG......................................................................21
4.8 - Table of characteristics...............................................................................................22
5 - SPARE PARTS................................................................................................................. 24
5.1 - First maintenance parts..............................................................................................24
5.2 - Technical support service...........................................................................................24
5.3 - Accessories................................................................................................................ 24
5.4 - Exploded view, parts list and tightening torque...........................................................25
Disposal and recycling instructions

EC Declaration
3
TAL 044
1 - RECEIPT 1.4 - Storage
1.1 - Standards and safety Prior to commissioning, machines should
measures be stored:
- away from humidity (< 90%); after a long
Our alternators comply with most period of storage, check the machine
international standards. insulation. To prevent the bearings from
See the EC Declaration of Incorporation on becoming marked, do not store in an
the last page. environment with significant vibration.
1.2 - Inspection 1.5 - Applications
On receipt of your alternator, check that it This alternator is mainly designed to
has not suffered any damage in transit. If produce electricity in the context of
there are obvious signs of knocks, contact applications involving the use of
the transporter (you may be able to claim generators.
on their insurance) and after a visual
check, turn the machine by hand to detect 1.6 - Usage restrictions
any malfunction. Use of the machine is restricted to operating
conditions (environment, speed, voltage,
1.3 - Identification power, etc) compatible with the characteri-
The alternator is identified by means of a stics indicated on the nameplate.
nameplate fixed on the machine (see
drawing).
Make sure that the nameplate on the
machine conforms to your order.
So that you can identify your alternator
quickly and accurately, we suggest you fill in
its specifications on the nameplate below.
Model TAL Freq. Hz

S/N Date Speed min-1
12345678910
Enclosure Protection Voltage V
Phase
Th. Class Altitude
Connection
Weight PF
kVA
AVR Excitation Cont.
BR kW IEC 60034 - 1& 5
Excitation No Load Full Load 40°C ISO 8528 - 3
A
415 v / 40°C NEMA MG1 - 32 & 33
kVA
Std by.
DE bearing PR kW
LSA 000-1-148 a
NDE bearing 27°C

A
MOTEURS LEROY-SOMER
2 BD MARCELLIN LEROY - 16000 ANGOULÊME - FRANCE
www.leroy-somer.com Scan the code or go to
GEN.LS1.DO
Made in Europe by Leroy-Somer to check product data
4
TAL 044
2 - TECHNICAL 2.2 - Mechanical characteristics
CHARACTERISTICS - Steel frame
2.1 - Electrical characteristics - Aluminum end shields
This alternator is a machine without - Protected ball bearings, greased for life
sliprings or revolving armature brushes, - Mounting arrangements: single bearing
wound as “2/3 pitch”, 4, 6 or 12-wire, with with standard feet and SAE flanges/
class H insulation and a field excitation coupling discs
system available in either SHUNT, AREP+ - Drip-proof machine, self-cooled
or PMG version (see diagrams and AVR - Degree of protection: IP 23
manuals). • Mechanical options
• Electrical options - Direct output power by cables (not
- Space heaters reconnectable), regulator fitted outside the
- R791 interference suppression alternator
• SHUNT dedicated single-phase 4-wire

STATOR: 4-wire (marking T1 to T4)
MAIN FIELD
T1 T3
EXCITER U1 U5
Armature
Varistor
T2 T4
Field U2 U6
- + Rotating rectifiers
yellow
black
red
blue
2 kOhms
HR / CW
F2 F1 N U R2 R1 Option: External remote voltage trimmer

Remove link R1-R2 if use
potentiometer
UF 0E UF S V
Consult R121 manual ref.5657
5
TAL 044
• SHUNT three-phase 6-wire
MAIN FIELD
T1 T2 T3
EXCITER U1 V1 W1
* not connected in delta connection

Armature Varistor
T4 T5 T6
Field U2 W2
V2
+ - Rotating rectifiers
black
red
connection
yellow
green * Delta
Star
blue connection
*
* For delta connection (1PH – 3PH):
use terminals N and U, connect N and N1
F2 F1 N U N1 V
FUSE
OPEN FOR 60Hz
SL UF 0E UF S V
6
TAL 044
MAIN FIELD STATOR: 12-wire (marking T1 to T12)
T3-W1
T9-W5
EXCITER
T7-U5
T1-U1
T2-V1
T8-V5
Armature
Field Varistor
- + Rotating rectifiers
T11-V6
T12-W6
T6-W2
T5-V2
T4-U2
T10-U6
black
red
3 PH 1 PH
D A F FF G
blue
T10 T3 T2 T10 T2
yellow
T1 T1 T1 T1 T3
white
N.C. T2 N.C. N.C. N.C.
green
T2 N.C. N.C. N.C. N.C.
*
F2 F1 N U N1 V * For F, FF and G connections:
connect N and N1
FUSE
OPEN FOR 60Hz
SL UF 0E UF S V
7
TAL 044
• AREP+ three-phase 6-wire
Winding H3
T3-W1
T1-U1
T2-V1
MAIN FIELD
EXCITER
Armature
Varistor
Exciter field
T6-W2
T5-V2
T4-U2
Rotating rectifiers
- +
Optional: //CT
green
yellow
1 kOhm 1W mini
white
black
blue
red
red
red
ST
6- 5+ 11 12 3 2 8 7 9 10
*
or
* Detection according to voltage:

V/W for high voltage (380-480V)
L1/L2 for low voltage (190-240V)
Consult manual ref.5599 OPTIONAL
External remote voltage trimmer
(remove ST)
8 -> Q1 For anti-clockwise

7 -> Q2 rotation
// CT
TI04: In / 1A
(D) "Star" only
T4
TI04 P2 P1
Neutral
8
TAL 044
• AREP+ three-phase 12-wire
Winding H3
T3-W1
T9-W5
T7-U5
T1-U1
T2-V1
T8-V5
MAIN FIELD
EXCITER
Armature
Varistor
Exciter field
T11-V6
T6-W2
T12-W6
T5-V2
T4-U2
T10-U6
Rotating rectifiers
- +
black
white
blue red
Optional: //CT
6- 5+ 11 12 8 7
1 kOhm 1W mini
ST
3 PH 1 PH
A-D-F FF G
red 3 T3 T10 T3
*
or
red
* 2 T2 T1 T2
3 PH 1 PH
D A-F FF G
yellow 10 T11 T3 T1 T3
green 9
T2 T2 T10 T2
Consult manual ref.5599 OPTIONAL
(remove ST)

7 -> Q2 rotation
// CT
TI04: In / 1A
(D) "Star" only
T10
TI04 P2 P1
Neutral
9
TAL 044
• PMG three-phase 6 or 12-wire
T3-W1
T9-W5
T7-U5
T1-U1
T2-V1
T8-V5
MAIN FIELD
PMG
EXCITER
Armature
Varistor
Exciter field
T11-V6
T6-W2
T12-W6
T5-V2
T4-U2
T10-U6
Rotating rectifiers
- +
red
red
red
white
T3-W1
T1-U1
T2-V1
blue
6- 5+ 14 15 16 8 7 STATOR: 6-wire
1 kOhm 1W mini
ST
T6-W2
T5-V2
T4-U2
Option: // CT
3 PH 1 PH
A**– D – F FF** G**
red 3 T3 T10 T3
*
or
red
* 2 T2 T1 T2
** A, FF and G connections:
possible with 12-wire only

Consult manual ref.5599

OPTIONAL
(remove ST)

7 -> Q2 rotation
// CT
TI04: In / 1A
(D) "Star" only
T10 or
T4
TI04 P2 P1
Neutral
10
TAL 044
3 - INSTALLATION The TAL 044 is equipped with two air
Personnel undertaking the various deflectors that prevent access to the upper
operations indicated in this section must and lower holes of the flange. Coupling for
wear personal protective equipment this machine should be done with screws in
appropriate for mechanical and electrical the eight accessible holes, disregarding the
hazards. ones that cannot be accessed because of
the deflectors.
3.1 - Assembly
All mechanical handling operations

must be undertaken using suitable
equipment and the machine must be
horizontal. Check how much the machine
weighs before choosing the lifting tool.
During this operation, do not allow
anyone to stand under the load.
Accessible holes
• Handling
The generously-sized lifting eyes are for • Single-bearing coupling
handling the alternator only. They must not Before coupling, check the compatibility
be used to lift the genset. The choice of between the alternator and the engine by
lifting hooks or handles should be performing:
determined by the shape of the lifting eyes. - undertaking a torsional analysis of the
Choose a lifting system which respects the transmission (alternators data are available
integrity and the environment of the on request),
machine. - checking the dimensions of the flywheel
and its housing, the flange, coupling discs
and offset.
During this operation, do not allow
anyone to stand under the load. WARNING
When coupling the alternator to the
prime mover, do not use the fan to turn
the alternator or rotor.
• Double-bearing coupling
The holes of the coupling discs should
-be
Semi-flexible coupling
aligned with the flywheel holes by
Careful alignment
cranking the engine.of the machines is
recommended,
Make sure thechecking
machinethatisthesecurely
lack of
concentricity and parallelism
bedded in position of both parts
during coupling.
of the coupling do not exceed 0.1 mm.
Check that there is lateral play on the
This alternator has been balanced with a
crankshaft.
1/2 key.
• Location
The location where the alternator is placed
must be ventilated to ensure that the
ambient temperature cannot exceed the
data on the nameplate.
11
TAL 044
3.2 - Checks prior to first use - the standard direction of rotation is clock-
wise as seen from the drive end (phase
• Electrical checks 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).
Under no circumstances should an 3.3 - Terminal connection diagrams
alternator, new or otherwise, be operated
To modify the connection, change the
if the insulation is less than 1 megohm
position of the stator cables on the terminals.
for the stator and 100,000 ohms for the
The winding code is specified on the
other windings.
nameplate.
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). Any intervention on the alternator
b) Blow hot air into the air intake, having terminals during reconnection or checks
made sure that the machine is rotating with should be performed with the machine
the exciter field disconnected. stopped. In no case should the internal
Note : Prolonged standstill connections in the terminal box be
In order to avoid these problems, we subjected to stresses due to cables
recommend the use of space heaters, as connected by the user.
well as turning over the machine from time
to time. Space heaters are only really • SHUNT dedicated single-phase 4-wire
effective if they are working continuously Connection
while the machine is stopped.
Series connection
WARNING T1 T2 T3 T4
Ensure that the alternator has the degree

of protection matching the defined DE
environmental conditions. T2
T3
R121
T4
L
L
When the alternator’s power output is T1 NDE
ensured directly through cables, these
must be connected before start-up.
• Mechanical checks
Before starting the machine for the first time,
check that:
- all fixing bolts are tight,
- the length of bolt and the tightening torque
are correct,
- the cooling air is drawn in freely,
- the protective grille and housing are cor-
rectly in place,
12
TAL 044
Connection codes Voltage / Detection Factory connection
D 3PH L1(U) Winding 50 Hz 60 Hz DE

T6
Star T1 6S 380 - 415 380 - 480 T5
N
8S - 380 - 416 T4
T4 W(3) L3
T3
T6 T5
V(2) L2
R120 : T2
U(1) L1
T3 T2 N => T5, U => T1, V => T2 T1
L3(W) L2(V)
NDE
F 1PH Winding 50 Hz 60 Hz DE
or
Delta L1(U)
3PH
6S 220 - 240 220 - 240
3PH (1PH)
T6 T1 8S - 220 - 240 T5
W(3) L3
T3
T4
V(2) L2 (L)
T3 T4 T2
R120 : U(1) L1 (L)
L3(W) L2(V) N => T2, U => T1, V => n.c. T1
T6
L T5 T2 L N => N1
NDE
In case of reconnection, ensure that AVR voltage detection is correct!
• AREP+ or PMG three-phase 6-wire

D 3PH L1(U) Winding 50 Hz 60 Hz DE

T6
Star T1 6S 380 - 415 380 - 480 T5
N
8S - 380 - 416 T4
T4 W(3) L3
T3
T6 T5
V(2) L2
R180 : T2
V => T2, W => T3 U(1) L1
T3 T2 T1
L3(W) L2(V)
NDE
F 1PH Winding 50 Hz 60 Hz DE
or
Delta L1(U)
3PH
6S 220 - 240 220 - 240
3PH (1PH)
T6 T1 8S - 220 - 240 T5
W(3) L3 (L)
T3
T4
V(2) L2 (L)
T3 T4 T2
R180 : U(1)-L1
L3(W) L2(V) L1 => T2, L2 => T3 T1
T2 T6
L T5 L
NDE
13
TAL 044
• SHUNT, AREP+ or PMG three-phase 12-wire
A 3PH L1(U) Winding 50 Hz 60 Hz DE

T1 T7 T12
Parallel Star 6 190 - 208 190 - 240 T11 *
T6
8 - 190 - 208 T5 T10
T4
T4
T10
T12
N
T5 R120 :
U => T1, N1 => T2, N => T3, V => n.c.
T9 T2
T11
T6 R180 :
L1 => T2, L2 => T3
L3(W) T3 T8 L2(V) NDE
L1(U) 50 Hz 60 Hz
D 3PH T1 Winding
T12
DE
Series Star T4
6 380 - 415 380 - 480 T11 *
T7
8 - 380 - 416 T10
T10
T12 R120 :
T9 U => T1, V => T2, N => T10, N1 => n.c.
T11 T5
T3 T6 T8 T2 R180 :
V => T2, W => T3
L3(W) L2(V) NDE
F L1(U) 1PH Winding 50 Hz 60 Hz DE

or
Series Delta
T12 T1
3PH
6 220 - 240 220 - 240
T11 *
T9 T4 8 - 220 - 240 T3
T6 T7 (L)
T10
R120 : (L)
T3 T10
U => T1, N1 => T2, N => T3, V => n.c.
L3(W) L2(V)
T11 T8 T5 T2
L L R180 : NDE
M
Voltage LM = 1/2 voltage LL
L1 => T2, L2 => T3 * If counter clockwise, L2 and L3 inverted
Winding 50 Hz 60 Hz DE
FF 1PH T11
T2 T6 T8 T12 6 220 - 240 220 - 240

T4 T3
T3
8 - 220 - 240
T10
T5 T11 T9
R120 : T2
T1 T4 T7 T10 T12 T6
L L
U => T10, N => T1, N => N1, V => n.c.
M
R180 :
Voltage LM = 1/2 voltage LL L1 => T1, L2 => T10 T5 NDE
50 Hz 60 Hz DE
G 1PH Winding T5 T11
T4
T6 T1 6 220 - 240 220 - 240
T12 T7 T10
8 - 220 - 240
T3 T4
T5 T2 R120 :
T9 T10
T11 T8 N => T2, U => T3, N1 => n.c., V => n.c.
L M L
R180 :
Voltage LM = 1/2 voltage LL L1 => T2, L2 => T3 NDE
14
TAL 044
• Connection checks 3.4 - Commissioning
Electrical installations must comply with

the current legislation in force in the The machine can only be started up and
country of use. used if the installation is in accordance
Check that: with the regulations and instructions
- The residual circuit-breaker conforms to
legislation on protection of personnel, in defined in this manual.
force in the country of use, and has been The machine is tested and set up at the
correctly installed on the alternator power factory. When first used with no load, make
output as close as possible to the alternator. sure that the drive speed is correct and
(In this case, disconnect the wire of the stable (see the nameplate). With the
interference suppression module linking the
neutral). regreasable bearing option, we recommend
- Any protection devices in place have not greasing the bearings at the time of
been tripped. commissioning (see section 4.3).
- If there is an external AVR, the connections On application of the load, the machine
between the alternator and the cabinet are should achieve its rated speed and voltage;
made in accordance with the connection however, in the event of abnormal operation,
diagram. the machine setting can be altered (follow
- There is no short-circuit phase-phase or the adjustment procedure in section 3.5). If
phase-neutral between the alternator output the machine still operates incorrectly, the
terminals and the generator set control
cabinet (part of the circuit not protected by cause of the malfunction must be located
circuitbreakers or relays in the cabinet). (see section 4.5).
- The machine should be connected with the
busbar separating the terminals as shown in 3.5 - Setting up
the terminal connection diagram.
- The alternator earth terminal inside the

terminal box is connected to the electrical
earth circuit The various adjustments during tests
- The earth terminal is connected to the must be made by a qualified engineer.
frame. Ensure that the drive speed specified on
The connections inside the terminal box
must never be subjected to stress due to the nameplate is reached before
cables connected by the user. commencing adjustment.
After operational testing, replace all
access panels or covers.
The AVR is used to make any adjustments
to the machine.
Diameter M6 M8 M10 M12
Torque 4 Nm 10 Nm 20 Nm 35 Nm
Tolerance ± 15%
15
TAL 044
4 - SERVICING - MAINTENANCE WARNING
4.1 - Safety measures Do not use: trichlorethylene, perchlo-
Servicing or troubleshooting must be
rethylene, trichloroethane or any alkaline
carried out strictly in accordance with
products.
instructions so as to avoid the risk of
accidents and to maintain the machine in
its original state.
These operations must be performed at a
cleaning station, equipped with a vacuum
system that collects and flushes out the
All such operations performed on the products used.
alternator should be undertaken by
The insulating components and the
personnel trained in the commissioning,
impregnation system are not at risk of
servicing and maintenance of electrical
damage from solvents. Avoid letting the
and mechanical components, who must
wear personal protective equipment cleaning product run into the slots.
appropriate for mechanical and electrical Apply the product with a brush, sponging
hazards. frequently to avoid accumulation in the
housing. Dry the winding with a dry cloth. Let
Before any intervention on the machine,
ensure that it cannot be started by a manual any traces evaporate before reassembling
or automatic system and that you have the machine.
understood the operating principles of the • Mechanical servicing
system.
WARNING
Cleaning the machine using water or a
highpressure washer is strictly prohi-
Warning : During and after running, the
bited. Any problems arising from such
alternator will reach temperatures hot
treatment are not covered by our
enough to cause injury, such as burns.
warranty.
Degreasing: Use a brush and detergent
4.2 - Routine maintenance (suitable for paintwork).
Dusting: Use an air gun.
• Checks after start-up
If the machine is fitted with air inlet and outlet
After approximately 20 hours of operation,
filters, the maintenance personnel should
check that all fixing bolts on the machine are
clean them routinely at regular intervals. In
still tight, plus the general state of the
machine and the various electrical the case of dry dust, the filter can be cleaned
connections in the installation. using compressed air and/or replaced if it is
clogged.
• Electrical servicing After cleaning the alternator, it is essential to
Commercially-available volatile degreasing check the winding insulation (see sections
agents can be used. 3.2 and 4.5).
16
TAL 044
4.3 - Bearings
The bearings are permanently greased Approximate life of the grease (depending on use) =
20,000 hours or 3 years.
4.4 - Mechanical defects

Fault Action
Excessive overheating of one or - If the bearing has turned blue or if the grease has turned
both bearings black, change the bearing.
Bearing (bearing temperature 80°C above - Bearing not fully locked (abnormal play in the bearing cage)
the ambient temperature) - End shields incorrectly aligned
- Air flow (inlet-outlet) partially clogged or hot air is being
Excessive overheating of recycled from the alternator or engine
Abnormal alternator frame (more than - Alternator operating at too high a voltage (>105% of Un on
temperature 40° C above the ambient load)
temperature) - Alternator overloaded
- Misalignment (coupling)
Too much vibration - Defective mounting or play in coupling
Vibrations - Rotor balancing fault (Engine - Alternator)
Excessive vibration and humming - Phase imbalance
noise coming from the machine - Stator short-circuit
- System short-circuit
- Misparalleling
Alternator damaged by a Possible consequences
Abnormal - Broken or damaged coupling
significant impact, followed by
noise - Broken or bent shaft end
humming and vibration
- Shifting and short-circuit of main field
- Fan fractured or coming loose on shaft
- Irreparable damage to rotating diodes/AVR, surge suppressor
17
TAL 044
4.5 - Electrical faults
Fault Action Effect Check/Cause
The alternator builds up and
its voltage is still correct - Lack of residual magnetism
when the battery is removed
Connect a new
battery of 4 to 12 The alternator builds up but - Check the connection of the voltage reference
No voltage volts to terminals its voltage does not reach to the AVR
at no load on F1 and F2, the rated value when the - Faulty diodes
start-up respecting the battery is removed - Armature short-circuit
polarity, for 2 to 3
The alternator builds up but -- Faulty
seconds AVR
its voltage disappears when - Field windings open circuit (check winding)
Revolving field coil open circuit (check the
the battery is removed resistance)
Check the AVR connections (AVR may be faulty)
- Field windings short-circuited
Correct speed - Rotating diodes burnt out
Voltage too Check the drive - Revolving field coil short-circuited (check the
low speed resistance)
Increase the drive speed (do not touch the AVR
Speed too low voltage pot. before running at the correct
speed)
Voltage too Adjust AVR voltage Adjustment ineffective - Faulty AVR
high potentiometer
- Check the speed: possibility of cyclic
Adjust the irregularity
Voltage AVR stability - Loose connections
oscillations potentiometer - Faulty AVR
- Speed too low when on load
Voltage between F1 and F2
(DC)
Voltage - Check the speed
Run at no load and SHUNT < 20V
correct at no check the voltage AREP+/PMG < 10V
load and too between F1 and F2
Voltage between F1 and F2 -- Faulty
low when on on the AVR rotating diodes
load (*) Short-circuit in the revolving field coil (check
SHUNT > 30V the resistance)
AREP+/PMG > 15V - Faulty exciter armature (check the resistance)
Check the AVR, the - Exciter winding open circuit
Voltage surge suppressor, - Faulty exciter armature
disappears the rotating diodes, The voltage does not return - Faulty AVR
during and replace any to the rated value - Revolving field coil open circuit or short-
operation defective circuited
components
(*) During single-phase operation, check that the sensing wires from the AVR are connected to the correct output terminals.
18
TAL 044
• Checking the winding Assembly A: Connect a 12 V battery in
You can check the winding insulation by series with a rheostat of approximately
performing a high voltage test. In this case, 50 ohms - 300 W and a diode on both exciter
you must disconnect all AVR wires. field wires (5+) and (6-).
ASSEMBLY A
6 - Field 5+
WARNING
1A diode Rh. 50 -300W
Damage caused to the AVR in such
conditions is not covered by our
warranty. +
-
• Checking the diode bridge
A diode in good working order should allow 12V battery
the current to flow only in the anode-to-
cathode direction.
+
Assembly B: Connect a “Variac” variable
-
Anode Cathode power supply and a diode bridge on both
+ - exciter field wires (5+) and (6-).
+ -
Both these systems should have
characteristics which are compatible with
A C
A C the field excitation power of the machine
(see the nameplate).
3) Run the unit at its rated speed.
4) Gradually increase the exciter field
current by adjusting the rheostat or the
variac and measure the output voltages on
L1 - L2 - L3, checking the excitation voltage
and current at no load (see the machine
nameplate or ask for the factory test report).
When the output voltage is at its rated value
and balanced within 1% for the rated
excitation level, the machine is in good
working order. The fault therefore comes
• Checking the windings and rotating from the AVR or its associated wiring (ie.
sensing, auxiliary windings).
diodes using separate excitation
ASSEMBLY B
6 - Field 5+
40
50 60 +
30
70
During this procedure, make sure that 1A diode

20
80
the alternator is disconnected from any

10
90
0 100
external load and inspect the terminal DC

box to check that the connections are Variac AC -
12V
fully tightened. 220V
1) Stop the unit, disconnect and isolate the

AVR wires.
2) There are two ways of creating an
assembly with separate excitation.
19
TAL 044
4.6 - Dismantling, reassembly - Check all modules using an ohmmeter or a
battery lamp.
WARNING - Refit the modules.
- Refit the air intake grille (51).
During the warranty period, this
operation should only be carried out in • Access to connections and the
an approved workshop or in our factory, regulation system
otherwise the warranty may be Access is directly after removing the terminal
invalidated. box top panel (48).
Whilst being handled, the machine
should remain horizontal (rotor not • Replacing the NDE bearing on single
locked in position). Check how much the bearing machines
alternator weighs before choosing the Dismantling
lifting method.
- Remove the terminal box top panel (48).
- Unscrew the fixing clamps on the power
output cables, remove the connector from
the exciter.
- Remove the nuts on the tie rods (37).
- Remove the NDE bracket (36) using a
puller: eg. U.32 - 350 (Facom).
- Remove the antifriction bearing (70) using
a screw puller.
• Tools required
To fully dismantle the machine, we
recommend using the tools listed below: Reassembly
- 1 ratchet spanner + extension - Heat the inner slipring of a new bearing by
- 1 torque wrench induction or in a drying oven at 80°C (do not
- 1 set of flat spanners: 7, 8, 10, 12 mm use an oil bath) and fit it to the machine.
- 1 socket set: 8, 10, 13, 16, 18, 21, 22, - Place the preloading wavy washer (79) in
24 mm the bracket and fit a new “O” ring seal (349).
- 1 Allen key: size 5 (eg. Facom: ET5), size 6 - Refit the NDE bracket and pass the bundle
(ET6), size 10 (ET10), size 14 (ET14) of wires between the top bars of the bracket.
- 1 socket TORX bit T20 and T30 - Refit the fixing clamps on the cables and
- 1 puller (U35)/(U32/350) the exciter connector.
- Replace the terminal box top panel (48)
• Screw tightening torque and also the earth continuity screw (29).
See section 5.4.
• Access to diodes
- Remove the air intake grille (51).
20
TAL 044
Reassembling the revolving field coil
- Follow the dismantling procedure in
NDE bracket reverse order.
Rotor Take care not to knock the windings when
Threaded rod refitting the rotor in the stator.
- Refit the fan with its fixing screws on the
hub.
Follow the procedure for reassembling the
bearings.
4.7 - Installation and maintenance of

the PMG
The PMG reference is PMG H3.
See the PMG manual ref : 5867.
WARNING
When dismantling the brackets, you will
need to change the antifriction bearings,
the “O” ring seal, the preloading (wavy)
washer and adhesive paste.
• Accessing the revolving field coil and

stator
Dismantling
Follow the procedure for dismantling the
bearings.
- Remove the coupling disc and insert a tube
of the corresponding diameter on the shaft
end.
- Rest the rotor on one of its poles, then slide
it out. Use the tube as a lever arm to assist
dismantling.
- After extraction of the rotor, be careful not
to damage the fan or dismantle it.
- Remove the revolving field coil and place
on special V-shaped supports.
NOTE: If intervention is required on the

revolving field coil (rewinding, replace-
ment of components), the rotor assembly
must be rebalanced.
21
TAL 044
4.8 - Table of characteristics • Three-phase: 4-pole AREP+ excitation
Table of average values: Resistances at 20 °C (Ω)
Alternator - 4 pole - 50 Hz - Standard winding Stator Exciter Exciter
No. 6S (6-wire) and M or M1 (4-wire) Type Rotor
L/N field armature
connected in dedicated single-phase (400 V A-B 0.067 2.07 7.26 0.791
for the excitation values). C-D 0.050 2.35 7.26 0.791
The voltage and current values are given for
E-H 0.034 2.89 8.07 0.920
no-load operation and operation at rated
load with separate field excitation. J 0.029 3.15 8.07 0.920
All values are given to within ± 10% and may K 0.024 3.43 8.07 0.920
be changed without prior notification (for L-M 0.019 4.04 4.82 1.051
exact values, consult the test report).
For 60 Hz machines, the “i exc” values are Resistance of auxiliary windings at
approximately 5 to 10 % lower. 20 °C (Ω)
Type X1, X2 Z1, Z2
• Three-phase: 4-pole SHUNT excitation A-B 0.450 0.657
Resistances at 20 °C (Ω) C-D 0.436 0.627
Stator Exciter Exciter E-H 0.365 0.575
Type Rotor
L/N field armature J 0.308 0.480
A-B 0.067 2.07 11.65 0.791 K 0.417 0.611
C-D 0.050 2.35 11.65 0.791 L-M 0.238 0.547
E-H 0.034 2.89 12.94 0.920
J 0.029 3.15 12.94 0.920 Field excitation current i exc (A)
400V - 50 Hz
K 0.024 3.43 12.94 0.920
“i exc”: excitation current of the exciter field
L-M 0.019 4.04 7.88 1.051
Type No load At rated load
Field excitation current i exc (A) A 1.08 3.35
400V - 50 Hz B 1.08 3.80
“i exc”: excitation current of the exciter field C 1.03 3.54
Type No load At rated load D 1.03 3.96
A 0.84 2.60 E 0.87 3.31
B 0.84 2.95 H 0.87 3.59
C 0.80 2.75 J 0.85 3.60
D 0.80 3.08 K 0.88 3.63
E 0.67 2.57 L 0.82 3.46
H 0.67 2.78 M 0.82 3.88
J 0.66 2.79
K 0.68 2.82
L 0.64 2.69
M 0.64 3.01
22
TAL 044
• Dedicated single-phase M: 4-pole • Table of weights
SHUNT excitation - 50 Hz (values given for information only)
Resistances at 20 °C (Ω) - Series Three-phase: SHUNT/AREP+
connection
Type Total weight (kg) Rotor (kg)
Stator Exciter Exciter
Type Rotor A-B 247 114
L/N field armature
C-D 280 128
C 0.012 2.07 11.65 0.791
E-H 353 160
D1 0.009 2.35 11.65 0.791
J 383 172
J 0.007 3.15 12.94 0.920
K 418 187
Field excitation current i exc (A) L-M 539 228
230V - 50 Hz
“i exc”: excitation current of the exciter field Dedicated single-phase M: SHUNT
Type No load At rated load Type Total weight (kg) Rotor (kg)
C 0.70 1.50 C 280 128
D1 0.70 1.50 D1 280 128
J 0.60 1.30 J 383 172
• Dedicated single-phase M1: 4-pole Dedicated single-phase M1: SHUNT

SHUNT excitation - 60 Hz Type Total weight (kg) Rotor (kg)
Resistances at 20 °C (Ω) - Series C 280 128
connection D1 280 128
Stator Exciter Exciter E 353 160
Type Rotor
L/N field armature K 418 187
C 0.008 2.07 11.65 0.791
D1 0.006 2.35 11.65 0.791
E 0.006 2.89 12.94 0.920
K 0.004 3.43 12.94 0.920
Field excitation current i exc (A)

240V - 60 Hz After operational testing, it is essential to
“i exc”: excitation current of the exciter field replace all access panels or covers. Don’t
Type No load At rated load forget the screw (29) earth continuity.
C 0.90 1.80
D1 1.00 2.00
E 0.60 1.70
K 0.70 1.50
23
TAL 044
5 - SPARE PARTS 5.3 - Accessories
5.1 - First maintenance parts • Space heater for use when stopped
Here is the list of parts: The space heater must run as soon as the
alternator stops. It is installed at the rear of
Single bearing kit 4879454 the machine. Its standard power is 100W
Non drive end bearing RLT040ET030 with 220V or 100W with 110V on request.
Preloading (wavy) washer
O ring seal
Diode bridge kit 4888595
Surge suppressor 4691059 Warning: the power supply is present
AVR SHUNT R120 4969966 when the machine has stopped.
AVR AREP+ R180 5089747
5.2 - Technical support service

Our technical support service will be
pleased to provide any additional
information you may require.
For all spare parts orders or technical

support requests, send your request to
service.epg@leroy-somer.com or your
nearest contact, whom you will find at
www.lrsm.co/support indicating the comp-
lete type of machine, its number and the
information indicated on the nameplate.
Part numbers should be identified from the

exploded views and their description from
the parts list.
To ensure that our products operate correctly

and safely, we recommend the use of
original manufacturer spare parts.
In the event of failure to comply with this
advice, the manufacturer cannot be held
responsible for any damage.
After operational testing, it is essential to

replace all access panels or covers.
24
TAL 044
5.4 - Exploded view, parts list and tightening torque
25
TAL 044
Screw Torque Screw Torque
Ref. Qty Description Ref. Qty Description
Ø N.m Ø N.m
Non drive end (NDE)
1 1 Stator assembly - - 70 1 bearing - -
Preloading (wavy)
4 1 Rotor assembly - - 79 1 - -
washer
15 1 Fan M6 5 90 1 Exciter field (stator) M6 10
Lifting eye (only with Exciter armature
21 1 M10 40 100 1 - -
TAL 044 L and M) (rotor)
28 1 Earth terminal M6* 10** 124 1 Terminal block M6 5
29 1 Earth continuity screw M6 10 132 1 Terminal box body - -
30 1 Drive end (DE) flange M12 69 133 1 Cover (option) M5 3.6
32 1 Flange body M12 69 139 1 Wire shield tube - -

**** (option)
Voltage regulator
33 2 Air outlet grille M6 5 198 1 M5 3.6
(AVR)
Non drive end (NDE)
36 1 M14 90*** 320 1 Coupling sleeve - -
bracket
37 4 Tie rod - - 322 2 Coupling disc M16 300
Plastic cap (except
40 2 - - 325 - Spacer shim - -
with TAL 044 L and M)
Terminal box top
48 1 M5 5 343 3 Diode bridge M5 3
panel
Surge suppressor
51 2 Air intake grille M5 3.6 347 1 M6 4
(+ PCB)
53 1 Sealing cap - - 349 1 O ring seal - -
* M12 (only with TAL 044 L and M)

** 69 N.m (only with TAL 044 L and M)
***130 N.m (only with TAL 044 L and M)
**** Qty: 2 (only with TAL 044 L and M)
26
TAL 044
Disposal and recycling instructions All materials listed above need special
We are committed to limiting the treatment to separate waste from
environmental impact of our activity. We reclaimable materials and should be
continuously monitor our production entrusted to specialist recycling companies.
processes, material sourcing and product
design to improve recyclability and minimise The oil and grease from the lubrication
our environmental footprint. system should be treated as hazardous
These instructions are for information waste and must be treated in accordance
purposes only. It is the user’s responsibility with local legislation.
to comply with local legislation regarding
product disposal and recycling. Our alternators have a specified lifetime of
20 years. After this period, the operation of
Recyclable materials the product should be stopped, regardless
Our alternators are mainly constructed from of its condition. Any further operation after
iron, steel and copper materials, which can this period will be under the sole responsi-
be reclaimed for recycling purposes. bility of the user.
These materials can be reclaimed through a
combination of manual dismantling,
mechanical separation and melting
processes. Our technical support depart-
ment can provide detailed directions on how
to dismantle products on request.
Waste & hazardous materials

The following components and materials
require special treatment and must be
separated from the alternator before the
recycling process:
- electronic materials found in the terminal
box, including the automatic voltage
regulator (198), current transformers (176),
interference suppression module and other
semi-conductors.
- diode bridge (343) and surge suppressor
(347), found on the alternator rotor.
- major plastic components, such as the
terminal box structure on some products.
These components are usually marked with
information concerning the type of plastic.
27
TAL 044
28
TAL 044
Moteurs Leroy-Somer
Boulevard Marcellin Leroy - CS 10015
16915 Angoulême cedex 9 - France
Angoulême, 28 October 2021
EC Declaration
Moteurs Leroy-Somer declares hereby that the electric generators of the types:
LSA 40 – LSA 42.3 – LSA 44.3 – LSA 46.3 – LSA 47.2 – LSA 47.3 – LSA 49.1 – LSA 49.3 – LSA 50.1 –
LSA 50.2 – LSA 51.2 – LSA 52.2 – LSA 52.3 – LSA 53 – LSA 53.1 – LSA 53.2 – LSA 54 – LSA 54.2 – TAL
040 – TAL 042 – TAL 044 – TAL 046 – TAL 047 – TAL 0473 – TAL 049 – LSAH 42.3 – LSAH 44.3
as well as their derivatives, manufactured by Leroy-Somer or on Leroy-Somer's behalf:
MOTEURS LEROY-SOMER MLS HOLICE STLO.SRO MOTEURS LEROY-SOMER

Boulevard Marcellin Leroy Sladkovskeho 43 1, rue de la Burelle
16015 Angoulême 772 04 Olomouc Boite Postale 1517
France République Tchèque 45800 St Jean de Braye France
LEROY-SOMER ELECTRO- NIDEC INDUSTRIAL AUTOMATION NIDEC INDUSTRIAL AUTOMATION

TECHNIQUE Co., Ltd INDIA PRIVATE Ltd - BANGALORE INDIA PRIVATE Ltd - HUBLI
No1 Aimosheng Road, Galshan Town, #45, Nagarur, Huskur Road #64/A, Main Road,
Cangshan District. Off Tumkur Road, Tarihal IndustrialArea,
Fuzhou, Fujian 350026 Chine Bengaluru-562 162 Inde Tarihal, Hubli-580 026 Inde
meet the requirements of the following standards and directives:
Declaration of compliance:
- Low Voltage Directive Nr 2014/35/EU dated 26th February 2014.
- EN and IEC 60034-1, 60034-5 and 60034-22.
- ISO 8528-3 “Reciprocating internal combustion engine driven alternating current generating sets. Part
3. Alternating current generators for generating sets”.
These generators also comply with the ROHS Directive Nr 2011/65/EU dated 8th June 2011 and its Annex II
Nr 2015/863 dated 31st March 2015, as well as the EMC Directive Nr 2014/30/EU dated 26th February 2014.
Declaration of incorporation:
These generators are designed to meet the essential requirements Annex I, chapters 1.1.2, 1.1.3, 1.1.5, 1.3.1
to 1.3.3, 1.3.6 to 1.3.8.1, 1.4.1, 1.4.2.1, 1.5.2 to 1.5.11, 1.5.13, 1.6.1, 1.6.4, 1.7 (except 1.7.1.2) of Machinery
Directive Nr 2006/42/EC, as well as Annex VII, part B of this directive and the aforementioned standards.
As a result, these "Partly completed machinery" are designed to be incorporated into Electrical Gen-Sets
complying with the Machinery Directive Nr 2006/42/EC dated 17th May 2006.
WARNING:
The here mentioned generators should not be commissioned until the corresponding Gen-Sets have been
declared in compliance with the Directives Nr 2006/42/EC, 2014/30/EU, 2011/65/EU and 2015/863, as well as
with other relevant Directives.
Moteurs Leroy-Somer undertakes to transmit, in response to a reasoned request by the national authorities,
relevant information on the generator.
Those responsible for compiling the technical files and this declaration are:
Yannick MESSIN, Technical Manager LS Orléans, 1 rue de la Burelle, 45800 Saint Jean de Braye
Jean-Pierre CHARPENTIER, Technical Manager LS Sillac, Bld Marcellin Leroy, 16015 Angoulême
J.P. CHARPENTIER – Y. MESSIN
Moteurs Leroy-Somer
Headquarters: Boulevard Marcellin Leroy CS 10015 - 16915 Angoulême cedex 9 - France
4152 en - 2021.10 / v
SAS with share capital of 38,679,664 € - RCS Angoulême 338 567 258
The contractual EC Declaration of compliance and incorporation can be obtained from your contact on
request.
29
TAL 044
30
Service & Support
Our worldwide service network of over 80 facilities is at your service.

This local presence is our guarantee for fast and efficient repair, support and
maintenance services.
Trust your alternator maintenance and support to electric power generation experts.
Our field personnel are 100% qualified and fully trained to operate in all environments
and on all machine types.
We have a deep understanding of alternator operation, providing the best value
service to optimise your cost of ownership.
Where we can help:
Design
•Consulting & specification
•Maintenance
contracts
Life Extension
•Reconditioning Start-up
•System upgrade
•Commissioning
•Training
Optimisation
•Monitoring Operation
•System audit •Genuine spare parts
•Repair services
Contact us:
Americas: +1 (507) 625 4011
EMEA: +33 238 609 908
Asia Pacific: +65 6250 8488
China: +86 591 8837 3010
India: +91 806 726 4867
Scan the code or go to:
service.epg@leroy-somer.com www.lrsm.co/support
www.leroy-somer.com/epg
Connect with us at:
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TAL 044

Low Voltage Alternator - 4 pole

SAFETY MEASURES b) Do not allow children younger than 14

© 2022 Moteurs Leroy-Somer SAS

Disposal and recycling instructions

Model TAL Freq. Hz

NDE bearing 27°C

• SHUNT dedicated single-phase 4-wire

F2 F1 N U R2 R1 Option: External remote voltage trimmer

Consult R121 manual ref.5657

STATOR: 6-wire (marking T1 to T6)

* not connected in delta connection

OPEN FOR 60Hz

Consult R120 manual ref.5243

MAIN FIELD STATOR: 12-wire (marking T1 to T12)

OPEN FOR 60Hz

Consult R120 manual ref.5243

* Detection according to voltage:

8 -> Q1 For anti-clockwise

8 -> Q1 For anti-clockwise

* Detection according to voltage:

Consult manual ref.5599

8 -> Q1 For anti-clockwise

All mechanical handling operations

Ensure that the alternator has the degree

D 3PH L1(U) Winding 50 Hz 60 Hz DE

In case of reconnection, ensure that AVR voltage detection is correct!

• AREP+ or PMG three-phase 6-wire

D 3PH L1(U) Winding 50 Hz 60 Hz DE

In case of reconnection, ensure that AVR voltage detection is correct!

A 3PH L1(U) Winding 50 Hz 60 Hz DE

F L1(U) 1PH Winding 50 Hz 60 Hz DE

T2 T6 T8 T12 6 220 - 240 220 - 240

In case of reconnection, ensure that AVR voltage detection is correct!

Electrical installations must comply with

- The alternator earth terminal inside the

4.4 - Mechanical defects

During this procedure, make sure that 1A diode

the alternator is disconnected from any

external load and inspect the terminal DC

1) Stop the unit, disconnect and isolate the

4.7 - Installation and maintenance of

• Accessing the revolving field coil and

NOTE: If intervention is required on the

• Dedicated single-phase M1: 4-pole Dedicated single-phase M1: SHUNT

Field excitation current i exc (A)

5.2 - Technical support service

For all spare parts orders or technical

Part numbers should be identified from the

To ensure that our products operate correctly

After operational testing, it is essential to

29 1 Earth continuity screw M6 10 132 1 Terminal box body - -

30 1 Drive end (DE) flange M12 69 133 1 Cover (option) M5 3.6

32 1 Flange body M12 69 139 1 Wire shield tube - -

* M12 (only with TAL 044 L and M)

Waste & hazardous materials

Angoulême, 28 October 2021

MOTEURS LEROY-SOMER MLS HOLICE STLO.SRO MOTEURS LEROY-SOMER

LEROY-SOMER ELECTRO- NIDEC INDUSTRIAL AUTOMATION NIDEC INDUSTRIAL AUTOMATION