5245f en PDF
5245f en PDF
5245f en PDF
LSA 52.3
Installation and maintenance
Electric Power Generation Installation and maintenance 5245 en - 2017.03 / f
LSA 52.3
Low Voltage Alternators - 4 pole
This manual concerns the alternator which you have just purchased.
We wish to draw your attention to the contents of this maintenance manual.
Warning symbol for general danger to - We reserve the right to modify the
personnel. characteristics of its products at any time in
order to incorporate the latest technological
developments. The information contained
in this document may therefore be changed
without notice.
Warning symbol for electrical danger to This document may not be reproduced in
personnel. any form without prior authorization.
All brands and models have been registered
and patents applied for.
WARNING SYMBOLS
We wish to draw your attention to the
following 2 safety measures which must be
complied with:
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LSA 52.3
Low Voltage Alternators - 4 pole
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................................................................................................... 6
3.1 - Assembly................................................................................................................... 6
3.2 - Checks prior to first use............................................................................................. 6
3.3 - Terminal connection diagrams................................................................................... 7
3.4 - Commissioning........................................................................................................ 10
3.5 - Setting up................................................................................................................ 10
4 - SERVICING - MAINTENANCE.......................................................................... 11
4.1 - Safety measures.......................................................................................................11
4.2 - Routine maintenance................................................................................................11
4.3 - Bearings.................................................................................................................. 12
4.4 - Mechanical defects.................................................................................................. 12
4.5 - Electrical faults........................................................................................................ 13
4.6 - Dismantling, reassembly......................................................................................... 15
4.7 - Installation & maintenance of the PMG................................................................... 17
4.8 - Table of characteristics....................................................................................... 17-18
5 - SPARE PARTS.................................................................................................. 19
5.1 - First maintenance parts........................................................................................... 19
5.2 - Technical support service........................................................................................ 19
5.3 - Accessories ............................................................................................................ 19
5.4 - Exploded views, parts list and tightening torque..................................................... 20
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LSA 52.3
Low Voltage Alternators - 4 pole
1 - RECEIPT 1.4 - Storage
Prior to commissioning, machines should
1.1 - Standards and safety be stored :
measures - 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.
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LSA 52.3
Low Voltage Alternators - 4 pole
2 - TECHNICAL CHARACTERISTICS - Single bearing standard alternator:
regreasable roller bearing
2.1 - Electrical characteristics - Double bearing standard alternator:
This alternator is a machine without regreasable NDE roller bearing and DE ball
sliprings or revolving field brushes, wound bearing
as 2/3 pitch; 6 wire, with class H - Single and double bearing marine
insulation and a field excitation system alternator or insulated bearing: regreasable
available in either AREP or PMG version NDE ball bearing
(see diagrams and AVR maintenance - Mounting arrangement: single-bearing
manual). with feet and SAE flanges/coupling discs,
Options double bearing with SAE flange and
- Stator temperature detection sensors standard cylindrical shaft extension
- Bearing sensors - Drip-proof machine, self-cooled
- Space heaters - Degree of protection: IP 23
- Protection or measurement current trans- Options
former (C.T.) - Protection against harsh environments
In order to conform to standard EN 61000- - Air inlet and outlet filter: IP 44
6-3, EN 61000-6-2, EN 55011, the R 791 To prevent excessive temperature rise
interference suppression kit is needed. caused by clogged filters, it is advisable to
monitor the stator winding with thermal
2.2 - Mechanical characteristics sensors (PT100).
- Steel frame
- Cast iron end shields
Armature
Field
5+ 6-
T4 T5 T6
Armature
Armature
suppressor
PMG
Surge
Surge
Field
Field
5+
5+ 6-
6-
T4
T4 T5
T5 T6
T6
D510C
D510C Voltage
Voltagereference
reference
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LSA 52.3
Low Voltage Alternators - 4 pole
3 - INSTALLATION Single-bearing coupling
Before coupling, check the compatibility
Personnel undertaking the various between the alternator and the engine by
operations indicated in this section must performing:
wear personal protective equipment - undertaking a torsional analysis of the
appropriate for mechanical and electrical transmission (alternators data are available
hazards. on request),
- checking the dimensions of the flywheel
3.1 - Assembly and its housing, the flange, coupling discs
and offset.
WARNING
When coupling the alternator to the
All mechanical handling operations
prime mover, do not use the fan to turn
must be undertaken using suitable
the alternator or rotor.
equipment and the machine must be
The holes of the coupling discs should
horizontal. Check how much the machine
be aligned with the flywheel holes by
weighs before choosing the lifting tool.
cranking the engine.
During this operation, do not allow
Make sure the machine is securely
anyone to stand under the load.
bedded in position during coupling.
Handling Check that there is lateral play on the
crankshaft.
The generously-sized lifting eyes are for
handling the alternator only. They must not Double-bearing coupling
be used to lift the genset. The choice of - Semi-flexible coupling
lifting hooks or handles should be Careful alignment of the machines is
determined by the shape of the lifting eyes. recommended, checking that the lack of
Choose a lifting system which respects the concentricity and parallelism of both parts
integrity and the environment of the of the coupling do not exceed 0.1 mm.
machine. This alternator has been balanced with a
1/2 key.
During this operation, do not allow Location
anyone to stand under the load. The room where the alternator is placed
must be ventilated to ensure that the
ambient temperature cannot exceed the
data on the nameplate.
3.2 - Checks prior to first use
Electrical checks
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LSA 52.3
Low Voltage Alternators - 4 pole
There are 2 possible methods for restoring 3.3 - Terminal connection diagrams
the above minimum values. To modify the connection, change the
a) Dry out the machine for 24 hours in a position of the stator cables on the terminals.
drying oven at a temperature of 110 C The winding code is specified on the
(without the regulator). nameplate.
b) Blow hot air into the air intake, having
made sure that the machine is rotating with
the exciter field disconnected.
Note : Prolonged standstill
In order to avoid these problems, we
recommend the use of space heaters, as Any intervention on the alternator
well as turning over the machine from time terminals during reconnection or checks
should be performed with the machine
to time. Space heaters are only really
stopped.
effective if they are working continuously In no case should the internal
while the machine is stopped. connections in the terminal box be
subjected to stresses due to cables
WARNING connected by the user.
Ensure that the alternator has the degree
of protection matching the defined
environmental conditions.
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 grills and housing are cor-
rectly in place,
- the standard direction of rotation is clock-
wise as seen from the drive 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).
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LSA 52.3
Low Voltage Alternators - 4 pole
Terminal connection
Connection code Voltage L-L
Ph1-L1
D T1-U1
Winding 50 Hz 60Hz
Star
3 PH T4-U2
6S 380 - 415 380 - 480
Factory connection
T6-W2 T5-V2 8S 347 380 - 416
T3-W1 T2-V1
AVR connector 0 - 380 V
Ph3-L3 Ph2-L2
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LSA 52.3
Low Voltage Alternators - 4 pole
Connection checks - The earth terminal is connected to the
frame.
The connections inside the terminal box
must never be subjected to stress due to
cables connected by the user.
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LSA 52.3
Low Voltage Alternators - 4 pole
3.4 - Commissioning 3.5 - Setting up
The machine can only be started up and The various adjustments during tests
used if the installation is in accordance must be made by a qualified engineer.
with the regulations and instructions Ensure that the drive speed specified on
defined in this manual. the nameplate is reached before
commencing adjustment.
The machine is tested and set up at the
After operational testing, replace all
factory. When first used with no load, make
access panels or covers.
sure that the drive speed is correct and
The AVR is used to make any adjustments
stable (see the nameplate). With the
to the machine.
regreasable bearing option, we recommend
greasing the bearings at the time of
commissioning (see section 4.3).
On application of the load, the machine
should achieve its rated speed and voltage;
however, in the event of abnormal operation,
the machine setting can be altered (follow
the adjustment procedure in section 3.5). If
the machine still operates incorrectly, the
cause of the malfunction must be located
(see section 4.5).
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LSA 52.3
Low Voltage Alternators - 4 pole
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
All such operations performed on the out 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 cleaning product run into the slots.
wear personal protective equipment Apply the product with a brush, sponging
appropriate for mechanical and electrical frequently to avoid accumulation in the
hazards.
housing. Dry the winding with a dry cloth. Let
Before any intervention on the machine, any traces evaporate before reassembling
ensure that it cannot be started by a manual the machine.
or automatic system and that you have
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
(suitable for paintwork).
4.2 - Routine maintenance
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 the case of dry dust, the filter can be cleaned
machine and the various electrical using compressed air and/or replaced if it is
connections in the installation. 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).
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LSA 52.3
Low Voltage Alternators - 4 pole
4.3 - Bearings
As an standard, the bearings are Regreasing interval: 1700 hrs of operation
regreasable DE bearing: Amount of grease: 70 gr
NDE bearing: Amount of grease: 35 gr
Standard grease LITHIUM - standard - NLGI 3
Grease used in the factory MOBIL POLYREX EM : grade NLGI 2
It is imperative to lubricate the alternator during operation and on first use. Before using
another grease, check for compatibility with the original one.
- 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
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LSA 52.3
Low Voltage Alternators - 4 pole
4.5 - Electrical faults
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LSA 52.3
Low Voltage Alternators - 4 pole
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
WARNING 6 - Field 5+
Damage caused to the AVR in such Rh. 50 -300W
conditions is not covered by our 1A diode
warranty.
+
Checking the diode bridge -
A diode in good working order should allow
the current to flow only in the anode-to- 12V battery
cathode direction.
A C Assembly B: Connect a Variac variable
Anode Cathode
power supply and a diode bridge on both
C C C
+ - exciter field wires (5+) and (6-).
Both these systems should have
characteristics which are compatible with
A A A 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
~ ~ ~
C C C
current by adjusting the rheostat or the
variac and measure the output voltages on
A C L1 - L2 - L3, checking the excitation voltage
A A A 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
Checking the windings and rotating excitation level, the machine is in good
diodes using separate excitation working order. The fault therefore comes
from the AVR or its associated wiring (ie.
sensing, auxiliary windings).
ASSEMBLY B
6 - Field 5+
During this procedure, make sure that
the alternator is disconnected from any 40
50 60 +
external load and inspect the terminal
30
70
1A diode
20
90
- DC
1) Stop the unit, disconnect and isolate the Variac AC 12V
AVR wires. 220V
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LSA 52.3
Low Voltage Alternators - 4 pole
4.6 - Dismantling, reassembly Access to connections and the
regulation system
During the warranty period, this
operation should only be carried out in Access directly by removing the box lid (48)
an approved workshop or in our factory, or the AVR access door (466).
otherwise the warranty
may be invalidated. Replacing the NDE bearing
Whilst being handled, the machine - Remove the air intake grille (51).
should remain horizontal (rotor not - Remove the lid of the protective cover (48)
locked in position). Check how much the and the side panels (366) and (367).
machine weighs before choosing the - Remove the hook (21) and the cover rear
lifting method. panel (365).
- Fit a M10 lifting ring (weight to handle:
300kg) on both top sides of the endshied in
the tapping provided for this purpose.
- Disconnect the exciter wires (5+,6-).
- Remove the screws (72) from the inner
bearing cap (78).
- Remove the screws (37).
- Remove the shield (36).
- Take out the antifriction bearing (70) using
a puller with a central screw (see drawing
below).
Tools required
To fully dismantle the alternator, we
recommend using the tools listed below :
- 1 ratchet spanner + extension
- 1 torque wrench
- 1 set of flat spanners : 8 mm, 10 mm, 18 mm
- 1 socket set : 8, 10, 13, 16, 18, 21, 24, 30 mm
- 1 socket with male ferrule: 5 mm
- 1 puller
- Fit the new antifriction bearing onto the
Screw tightening torque shaft after heating it by induction to
See section 5.4. approximately 80 C.
- Mount the new preloading (wavy) washer
Access to diodes (79) in the shield (36).
- Open the air intake grille (51). - Screw a threaded rod into the inner bearing
- Disconnect the diodes. cap (78).
- Disconnect the diodes using an ohmmeter - Refit the end shield on the machine using
or a battery lamp. a dowel and nut in the shaft extension (see
- Remove the surge suppressor (347). drawing).
- Remove the 6 H mounting nuts for the
diode bridges on the support.
- Change the fitted caps, respecting the
polarity.
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LSA 52.3
Low Voltage Alternators - 4 pole
- Slide the threaded rod into the shield hole - Slide the threaded rods into the shield
to make it easier to assemble (see diagram). holes to make it easier to assemble (see
Ball single bearing Ball double bearing basic diagram).
36 36
- Tighten the bottom inner bearing cap
78 78 screws (78), remove the threaded rod and fit
the other screws.
- Tighten the shield screws (31).
4 4 - Refit the air outlet grille (33).
WARNING
When dismantling the shields, you will
need to change the antifriction bearings
and the preloading (wavy) washer.
WARNING
Replacing the DE bearing
- Remove the air outlet grille (33). When dismantling the rotor involves
- Remove the screws (31) from the DE shield changing parts or rewinding, the rotor
and the 4 screws (62) from the inner bearing must be rebalanced.
retainer.
- Remove the shield (30).
- Take out the ball bearing (60) using a puller
with a central screw.
- Fit the new bearing, after heating it by
induction to approximately 80 C.
- Screw two threaded rods into the inner
bearing cap (68).
- Refit the shield (30) on the machine.
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LSA 52.3
Low Voltage Alternators - 4 pole
Reassembling the machine
- Mount the rotor (4) in the stator (1) (see 417
drawing above)
taking care not to knock the windings.
- Slide the threaded rod into the shield hole
to make it easier to assemble (see diagram).
- Fit an inner bearing cap screw (78), remove
the threaded rod, fit the other screw and
tighten up the assembly.
- Tighten the shield screws (37). 418
- Reconnect exciter field wires E+, E-.
- Finish reassembling the cover.
- Refit the flange (30) on the stator (1).
- Tighten the screws (31).
If using a twin-bearing machine:
- Finish reassembling the cover.
- Screw a threaded rod into the inner bearing
cap (68). DE filter
- Refit the shield (30) on the machine.
- Slide the threaded rod into the shield hole
to make it easier to assemble (see diagram). 417
- Fit the inner bearing cap screws (68),
remove the threaded rod, fit the other screw
and tighten up the assembly.
- Tighten the shield screws (31).
- Refit the air outlet grille (33).
- Check that the machine assembly is 418
correctly mounted and that all screws are
tightened.
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 for cleaning the
filter.
To replace, follow the instructions in reverse
order.
417
4.7 - Installation and maintenance of
418
the PMG
The PMG reference is : PMG 8.
See the PMG manual ref : 4211.
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LSA 52.3
Low Voltage Alternators - 4 pole
The voltage and current values are given for Voltage of auxiliary windings at no
no-load operation and operation at rated load
load with separate field excitation. All values
are given at 10% and may be changed Type Auxil wdg: X1, X2 Auxil wdg: Z1, Z2
without prior notification (for exact values,
consult the test report). 50 Hz 100V 10V
60 Hz 120V 12V
Average values
Resistances at 20C () Table of weights
(values given for information only)
Type L/N stator Rotor Exciter field Armature
S5-S6 0.0020 0.35 8.7 0.020 Type Total weight (kg) Rotor (kg)
S7 0.0016 0.37 8.7 0.020 S5-S6 3740 1420
L9 0.0012 0.42 8.7 0.020 S7 3980 1460
L12 0.0010 0.48 8.7 0.020
L9 4470 1640
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LSA 52.3
Low Voltage Alternators - 4 pole
5 - SPARE PARTS In the event of failure to comply with this
advice, the manufacturer cannot be held
5.1 - First maintenance parts responsible for any damage.
Emergency repair kits are available as an
option.
They contain the following items :
Emergency kit AREP ALT 523 KS 001
AVR R 449 - After operational testing, it is essential to
Diode bridge assembly - replace all access panels or covers.
Surge suppressor -
Emergency kit AREP ALT 523 KS 002
AVR D 510C - 5.3 - Accessories
Diode bridge assembly - Space heater when stopped
Surge suppressor -
The space heater must run as soon as the
Single-bearing kit ALT 523 KB 002 alternator stops. It is installed at the rear of
Non drive end bearing - the alternator. Its standard power is 500W
O ring - with 220V or 250W with 110V on request.
Preloading (wavy) washer -
Double-bearing kit ALT 523 KB 001
Non drive end bearing -
Drive end bearing - Caution : the power supply is present
O ring - when the alternator has stopped.
Preloading (wavy) washer -
Connection accessories
- 6-wire machines
5.2 - Technical support service
Our technical support service will be pleased Requirements for coupling (F):
to provide any additional information you - 3 links.
may require.
When ordering spare parts, you should
indicate the complete machine type, its
serial number and the information given on
the nameplate.
Address your enquiry to your usual contact.
Part numbers should be identified from the
exploded views and their description from
the parts list.
Our extensive network of service centres
can dispatch the necessary parts without
delay.
To ensure correct operation and the safety
of our machines, we recommend the use of
original manufacturer spare parts.
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LSA 52.3
Low Voltage Alternators - 4 pole
5.4 - Exploded view, parts list and tightening torque
Single-bearing
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LSA 52.3
Low Voltage Alternators - 4 pole
Double bearing
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LSA 52.3
Low Voltage Alternators - 4 pole
Screw Torque Screw Torque
Ref. Qty Description Ref. Qty Description
N.m N.m
1 1 Stator assembly - - 90 1 Exciter field M8 20
4 1 Rotor assembly - - 96 2 Air inlet cover IP21 - -
15 1 Fan - - 98 2 Air inlet cover IP23 - -
21 1 Lifting ring - - 100 1 Exciter armature - -
30 1 Drive end shield M12 69 120 1 Terminal support - -
Terminals insulated
33 1 Protective grille M6 5 124 5 - -
supports
36 1 Exciter end shield M12 69 128 3 Starting range - -
41 1 Cover front panel M6 5 130 1 Neutral link - -
47 1 Terminal box rear lid M6 5 190 1 Terminal block - -
48 1 Terminal box top lid M6 5 198 1 Voltage regulator (AVR) - -
49-50 1 Inspection door M6 5 199 1 Protective cover IP23 - -
51 1 Air intake grille M6 5 320 1 Coupling hub - -
60 1 DE bearing - - 322 3 Coupling disc - -
68 1 Inner bearing cap - - 323 8 Fixing screw M20 340
70 1 NDE bearing - - 343 1 Diode bridge assembly M6 4
71 1 Cover - - 366 1 Terminal box side lid - -
Terminal box side lid with
78 1 Inner bearing cap - - 367 1 - -
inspection door
79 1 Preloading wavy washer - - 466 1 AVR inspection door - -
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LSA 52.3
Low Voltage Alternators - 4 pole
Disposal and recycling instructions The oil and grease from the lubrication
We are committed to limit the environmental system should be considered as a hazardous
impact of our activity. We continuously waste and has to be handled according to
survey our production processes, material local legislation.
sourcing and products design to improve
recyclability and diminish our footprint.
These instructions are for information
purposes only. It is the user responsibility to
comply with local legislation regarding
product disposal and recycling.
Recyclable materials
Our alternators are mainly built out of iron,
steel and copper materials, which can be
reclaimed for recycling purposes.
These materials can be reclaimed through a
combination of manual dismantling,
mechanical separation and melting
processes. Our technical support depar-
tment can provide detailed directions on
products dismounting upon request.
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LSA 52.3
Low Voltage Alternators - 4 pole
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LSA 52.3
Low Voltage Alternators - 4 pole
This Declaration applies to the generators designed to be incorporated into machines complying with the
Machinery Directive Nr 2006/42/EC dated 17 May 2006.
LSA40 - LSA42.3 - LSA44.2 - LSA44.3 - LSA46.2 - LSA46.3 - LSA47.2 - LSA49.1 - LSA49.3 - LSA50.1 -
LSA50.2 - LSA51.2 - LSA52.2 - LSA52.3 - LSA53.1 - LSA53 - LSA53.2 - LSA54 - LSA54.2 - TAL040 - TAL042 -
TAL044, as well as their derivatives, manufactured by Leroy-Somer or on Leroy-Somer's behalf, comply with the
following International Standards and Directive:
Furthermore, these generators, designed in compliance with the Machine Directive Nr 2006/42, are therefore
able to be incorporated into Electrical Gen-Sets complying with the following International Directives:
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 and 2014/30/UE, as well as with the other relevant
Directives.
Leroy-Somer undertakes to transmit, in response to a reasoned request by the national authorities, relevant
information on the generator.
Technical Managers
J.P. CHARPENTIER - Y. MESSIN
4152 en - 2016.05 / k
The contractual EC Declaration of Conformity and Incorporation can be obtained from your contact on
request.
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LSA 52.3
Low Voltage Alternators - 4 pole
26
Service & Support
Life Extension
Remanufacturing Start-up
System upgrade
Commissioning
Training
Optimization
Monitoring Operation
System audit Genuine spare parts
Repair services
Contact us:
Americas: +1 (507) 625 4011
Europe & International: +33 238 609 908
Asia Pacific: +65 6250 8488
China: +86 591 88373036
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
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