F

D
C
B
A

P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049

Low Voltage Alternators - 4 pole

Installation and maintenance
 Electric Power Generation Installation and maintenance 5867 en - 2022.12 / d

P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
This manual
manual concerns
concernsthe
thealternator
P.M.G. which you
which youhave
havejust
justpurchased.
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 various operations described in this The alternators must not be put into
manual are accompanied by service until the machines in which they
recommendations or symbols to alert the are to be incorporated have been
user to potential risks of accidents. It is vital declared compliant with EC Directives
that you understand and take notice of the plus any other directives that may be
following warning symbols. applicable.
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
 Electric Power Generation Installation and maintenance 5867 en - 2022.12 / d

P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
CONTENTS

1 - GENERAL INFORMATION ................................................................................................4

1.1 - Description.................................................................................................................... 4
1.2 - Identification.................................................................................................................. 4

2 - OPERATION........................................................................................................................ 5
2.1 - PMG excitation system..................................................................................................5

3 - TECHNICAL CHARACTERISTICS.....................................................................................6
3.1 - Electrical characteristics................................................................................................6

4 - INSTALLATION - COMMISSIONING..................................................................................7
4.1 - Mounting the PMG G3, H3, J3 and K3...........................................................................7
4.2 - Mounting the PMG L3...................................................................................................7
4.3 - Electrical connection of a PMG on an Shunt machine...................................................8
4.4 - Electrical connection of a PMG on an AREP+ machine.................................................9

5 - SPARE PARTS.................................................................................................................... 9
5.1 - Designation................................................................................................................... 9
5.2 - Technical support service..............................................................................................9

Disposal and recycling instructions

All servicing or repair operations carried out on the PMG and the alternator should be under-
taken by personnel trained in the commissioning, servicing and maintenance of electrical and
mechanical components ; they must wear personal protective equipment appropriate for
mechanical and electrical hazards.

3
 Electric Power Generation Installation and maintenance 5867 en - 2022.12 / d

P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
1 - GENERAL INFORMATION D350 (option) digital regulators are
compatible with all types of PMG. Other
1.1 - Description regulators can be associated with our
The PMG (Permanent Magnet Generator) PMGs, consult us.
is a system which is used to supply the
short-circuit current to the alternator.
The PMG produces an AC current WARNING
proportional to the speed, used as field
excitation power by the AVR. When mounting on an alternator SHUNT
The PMG assembly forms a rotating part TAL 042, if the voltage is higher than
which can be fitted at the rear of the alternator 480V respect drilling according to the
as required. drawing below.
Operating temperature:
- 20°C to + 70°C
Storage temperature:
- 55°C to + 85°C

28±1
1.2 - Identification
There are 5 types of PMG suitable for the 0.2
Ø21± 0
TAL ranges of alternators.
16±1
Standard
Type PMG
AVR
TAL 042 G3 R180 The regreasable bearing option is not
TAL 044 H3 R180 available for TAL.
TAL 046 J3 R180
TAL 0473 K3 R180
TAL 049 L3 R180

The PMG G3, H3, J3, K3 and L3 kits consist of a housing (A), a dummy shaft extension (B), a
PMG rotor (C), a PMG stator (D), a cover plate (E), a spacer housing (F) (PMG L3 only) and a
bag of accessories for mounting and electrical connection.

E
F
D
C
A B

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P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
2 - OPERATION The AVR monitors and corrects the
alternator output voltage by adjusting the
2.1 - PMG excitation system excitation current.
With PMG excitation, the permanent
magnet generator (PMG) added to the
alternator supplies the AVR with voltage WARNING
which is independent of the main alternator
winding. It is fitted at the rear of the machine The PMG only works with R180 or D350
and is connected to the AVR. (option) (incompatible with the R120,
As a result the machine has a short-circuit
current capacity of 3 IN for 10 s. R121, R150, R220, R221, R250 AVRs).

• PMG system with R180 STATOR: 12-wire (T1 to T12 identification)

T3-W1

T9-W5
T7-U5
T1-U1

T2-V1

T8-V5
MAIN FIELD
PMG
EXCITER
Varistor

Armature

Exciter field

T11-V6

T6-W2

T12-W6
T5-V2
T4-U2

T10-U6
Rotating rectifiers
- +
red or white
red

red

red

T3-W1
T1-U1

T2-V1
black or 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

* Detection according to voltage:

V/W for high voltage (380-480V)
L1/L2 for low voltage (190-240V)

Example: TAL 046 manual ref. 5377

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P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
3 - TECHNICAL CHARACTERISTICS
3.1 - Electrical characteristics

Stator phase/phase No-load voltage No-load voltage

Type resistance at 20°C at 1500 min-1 at 1800 min-1
Ohms V V
PMG G3 2.59 157 188
PMG H3 2.59 157 188
PMG J3 2.59 157 188
PMG K3 2.59 157 188
PMG L3 1.06 180 217

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 Electric Power Generation Installation and maintenance 5867 en - 2022.12 / d

P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
4 - INSTALLATION - - Once the rotor is in position, remove the
COMMISSIONING M10 tie rods.
- Mount the cable gland washer.
- Lock the assembly with the M10 nut
(PMG G3 and K3) to a torque of 30 Nm or
Before working on the alternator, ensure the M16 nut (PMG H3 and J3) to a torque of
that it cannot be started by a manual or 116 Nm.
automatic system by isolating the power - Pierce the cover (Ø 21 hole) or remove the
(disconnection of all electrical, plastic plug on the NDE panel.
mechanical power, etc) in any cabinets - Fit the plastic sheath and its two ferrules,
and that you have understood the while inserting the 3 PMG wires.
system operating principles. - Close the PMG with the cover [E].

4.1 - Mounting the PMG G3, H3, J3 4.2 - Mounting the PMG L3
and K3 - Remove the protection cover from the NDE
bracket of the alternator (4 hexagonal
WARNING screws).
Make sure the bevel washers are fitted - Fit the housing [A] into the NDE bracket,
the right way round. then fasten it using the 4 M6 hexagonal
screws (torque: 8.3 N.m).

- Remove the alternator NDE bracket seal.

- Mount the PMG housing assembly [A] on
the bracket, take care to position the cable
through-holes at 9 o’clock as seen from the
non-drive end, and tighten the 4 HM6 screws
to a torque of 8.3 Nm (PMG G3, self-tapping
screws tightened to 10 Nm).
- Put a coating of anti-vibration adhesive on
the tie rod and screw it tight on the alternator D
shaft extension. A
- Mount the magnetised rotor [C] on the
shaft adapter [B]. - Slide the PMG stator [D] into the housing
[A].
- Fasten the stator using M6 screws +
washers [G] (torque: 8.3 N.m).
Warning: magnetic force (risk of
pinching).
- Using 2 M10 threaded rods screwed into
the rotor, slide the assembly onto the tie rod.
C
B

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P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
- Position the spacer housing [F] while 4.3 - Electrical connection of a PMG
inserting the stator output wires through the on a Shunt machine
duct [H], then fasten the spacer housing
using the 4 M5 screws (torque: 5 N.m). WARNING

H If mounting a PMG, replace the following

regulators.
Replace R120/R150 by R180
- Disconnect the connection wires from the
R120 or R150 and remove the AVR.
- Take out the 3 voltage and power supply
reference wires (yellow / green / blue), by
removing them from the terminals (T1, T2
and T5) in which they are inserted.
- Fit the AVR support plate fitted with the
R180 (4M5 self-tapping screws tightened to
F 6 N.m).
- Rewire the 2 red wires on T2 and T3 for the
- Position the rotor [C] on the out-of-round voltage detection then reconnect the wires
on the shaft [B], insert the assembly into the of excitation and power supply of the PMG,
PMG, and then tighten with the screws and according to the diagram of the alternator
washers [I] (torque: 115 N.m). maintenance manual.
- In the terminal box, stick the self-adhesive
bases on the NDE bracket and on the
terminal block to bring the PMG wires into
the AVR.
- Next, attach the sheath with the PMG wires
to the self-adhesive bases using plastic
clamps.
I - Make a bridge around the shield spigot to
C avoid the sheath quickly becoming damaged
B and the risk of a short-circuit.
- Connect the 3 PMG wires (14/15/16), the
- Fasten the cover plate [E] using the 4 M5 2 exciter field wires (5/6) and the 2 previously
screws (torque: 5 N.m). mentioned voltage sensing wires (2/3)
according to the internal connection diagram
in the alternator maintenance manual.

WARNING
With PMG excitation, check that the ST9
jumper on the AVR is open.
After operational testing, replace all
E access panels or covers.

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P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
4.4 - Electrical connection of a PMG 5 - SPARE PARTS
on an AREP+ machine 5.1 - Designation
- In the terminal box, stick the self-adhesive
bases on the NDE bracket and on the Description Code
terminal block to bring the PMG wires into PMG G3 5203402
the AVR. PMG G3 + R180 5203406
- Next, attach the sheath with the PMG wires PMG H3 5203407
to the self-adhesive bases using plastic
PMG H3 + R180 5203408
clamps.
- Make a bridge around the shield spigot to PMG J3 5203409
avoid the sheath quickly becoming damaged PMG J3 + R180 5203410
and the risk of a short-circuit. PMG K3 5203412
- Connect the 3 PMG wires (14/15/16), to PMG K3 + R180 5203415
terminals X1, X2, Z2 on the AVR. The
4 auxiliary winding wires X1.X2.Z1.Z2 PMG L3 5203426
should be isolated using the domino fitting PMG L3 + R180 5203431
supplied with the kit. Both the field wires
(5/6) and the voltage sensing wires (2/3)
5.2 - Technical support service
remain in place.
Our technical support service will be
pleased to provide any additional
information you may require.

When using a PMG as an AREP+ alter- For all spare parts orders or technical
nator, a modification of the instability support requests, send your request to
adjustment (regulator stab potentio- service.epg@leroy-somer.com or your
meter) may be necessary. nearest contact, whom you will find at
Check that the ST9 jumper on the AVR is www.lrsm.co/support indicating the type
open. and the code number of the PMG.

WARNING
To ensure that our products operate
After operational testing, replace all correctly and safely, we recommend the
access panels or covers. 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.

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P.M.G. range
TAL 042 to TAL 046 - TAL 0473 - TAL 049
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.

10
 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.emersonindustrial.com
www.leroy-somer.com/epg

Connect with us at:

5867 en - 2022.12 / d