LSA 43.3 L7 Low Voltage Alternator
LSA 43.3 L7
Low Voltage Alternator IC7 – 2 poles
Installation and maintenance
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
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 Before using your machine for the first time, it is important to read the whole of this installation and maintenance manual. All necessary operations and interventions on this machine must be performed by a qualified technician. Our technical support service will be pleased to provide any additional information you may require. The various operations described in this manual are accompanied by recommendations or symbols to alert the user to potential risks of accidents. It is vital that you understand and take notice of the following warning symbols.
WARNING
Warning symbol for an operation capable of damaging or destroying the machine or surrounding equipment.
Warning symbol for general danger to personnel.
Warning symbol for electrical danger to personnel.
SAFETY INSTRUCTIONS WSeets woifsshelft-oaddhreaswiveyostuicr kearttsednetiopnictitnog the fvoallroiowuisngw2arsnainfegtysymmebaoslusreasrewihnicclhudmeudswt bithe cthoims mplaieindtwenitahn: ce manual. aT)hDeyursihnoguoldpebreaptioosnit,iodnoendoatsalslhoowwanniynotnhe tdoraswtainngdbienlofrwonont coef the maiarcohuintleethgaus abredesn, ifnullcyaisnestanlleydth. ing is ejected from them.
Wb)ADRoNnINotGallow children younger than 14 Ttohgeoanlteearrntahteorasir mouutslett ngoutarbdes. put into sAesrevticoef suenlft-ial dthheesmivaecshtinckeesrsindwephiiccthingthtehye avarerioutos wbaerniningcsoyrmpobroalsteids inhcaluvdeedbeweitnh dtheisclmaraeidntecnoamncpeliamnat nwuaitlh. TEhCeyDsihreocutldivebse polussitioanneyd oatsheshr odwirnecintitvheesdtrhaawtinmg abyelobwe aopncpelicthaebmlea. chine has been fully installed. This manual is to be given to the end user.
The range of electric alternators and their derivatives, manufactured by us or on our behalf, comply with the technical 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 of the generator, sized to interrupt the fault current.
© 2024 Moteurs Leroy-Somer SAS Share Capital: 32,239,235 , RCS Angoulême 338 567 258. We reserve the right to modify the characteristics of this product at any time in order to incorporate the latest technological developments. The information contained in this document may therefore be changed without notice. This document may not be reproduced in any form without prior authorization. All brands and models have been registered and patents applied for.
2
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
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 – Application …………………………………………………………………………………………………. 4 1.6 – Usage restrictions……………………………………………………………………………………….. 4
2 – TECHNICAL CHARACTERISTICS ………………………………………………………………………. 5
2.1 – Mechanical characteristics …………………………………………………………………………… 5 2.2 – Cooling circuit characteristics ……………………………………………………………………….. 5 2.3 – Electrical characteristics ………………………………………………………………………………. 5
3 – INSTALLATION …………………………………………………………………………………………………. 7
3.1 – Assembly …………………………………………………………………………………………………… 7 3.2 – Checks prior to first use……………………………………………………………………………….. 7 3.3 – Terminal connection…………………………………………………………………………………….. 8 3.4 – Commissioning …………………………………………………………………………………………… 8 3.5 – Setting up ………………………………………………………………………………………………….. 8
4 – SERVICING – MAINTENANCE…………………………………………………………………………….. 9
4.1 – Safety measures…………………………………………………………………………………………. 9 4.2 – Routine maintenance…………………………………………………………………………………… 9 4.3 – Bearings ………………………………………………………………………………………………….. 10 4.4 – Cooling circuit …………………………………………………………………………………………… 10 4.5 – Mechanical defects……………………………………………………………………………………. 10 4.6 – Electrical faults …………………………………………………………………………………………..11 4.7 – Dismantling, reassembly ……………………………………………………………………………. 13 4.8 – Table of characteristics ………………………………………………………………………………. 14
5 – SPARE PARTS ………………………………………………………………………………………………… 15 5.1 – First maintenance parts ……………………………………………………………………………… 15 5.2 – Technical support service …………………………………………………………………………… 15 5.3 – Accessories …………………………………………………………………………………………….. 15 5.4 – Exploded view, parts list and tightening torque ……………………………………………… 16
Disposal and recycling instructions
3
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
1 – RECEIPT
1.1 – Standards and safety measures Our alternators comply with international standards.
most
1.2 – Inspection
On receipt of your alternator, check that it has not suffered any damage in transit. If there are obvious signs of knocks, contact the transporter (you may be able to claim on
their insurance).
1.3 – Identification The alternator is identified by means of a 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.
1.4 – Storage
Prior to commissioning, machines should be stored away from humidity (< 90%). After
a long period of storage, check the machine insulation (see sections 3.2 and 4.6). To prevent the bearings from becoming marked, do not store in an environment with significant vibration. For prolonged storage, please follow the recommendations in the storage manual ref 4954 available on our website: www.nidecpower.com/downloads
1.5 – Applications
This alternator is mainly designed to produce electricity in the context of applications involving the use of generators.
1.6 – Usage restrictions
Use of the machine is restricted to operating conditions (environment, speed, voltage, power, etc) compatible with the characteristics indicated on the nameplate.
LSA 000-1-148 a
Model LSA S/N
Enclosure Th. Class
Weight AVR
Excitation values
DE bearing NDE bearing
IC Code: IC7A1W7
Date
Protection
Altitude
PF
Excitation
No Load
Full Load
Frequency Hz
Speed min-1
Voltage
V
Phase
Connection
Cont.
kVA
BR
kW
4805°C
A
Stand by kVA
PR
kW
27°C A
38537800001
MOTEURS LEROY-SOMER 2 BD MARCELLIN LEROY 16000 ANGOULÊME – FRANCE
www.leroy-somer.com
Made in Europe by Leroy-Somer
IEC 60034 – 1& 5 ISO 8528 – 3 NEMA MG 1 32 & 33
Scan the code or go to GEN.LS1.DO
to check product data
4
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
2 – TECHNICAL CHARACTERISTICS
2.1 – Mechanical characteristics – Steel frame
– Cast iron end shields
– Protected ball bearings, greased for life – Mounting arrangement: two-bearing with Rotex coupling and cylindrical shaft extension – Enclosed machine cooled by heat transfer fluid – Degree of protection: IP 6K9K – Cooling of the terminal box by an air flow with a maximum temperature of:
· 1 to 25°C with minimum 0.8 m3/min flow · 50°C with minimum 2 m3/min flow
2.2 – Cooling circuit characteristics – Cooling method: IC7A1W7 – Type of fluid: water + additive – Operating temperature: 85°C (±7°C) – Permitted additives: Glycol-type antifreeze
– Maximum level of additives: 50% – Operating pressure: 3 bar
– pH of water: 7<pH<8
Precautions: – P260: Do not breathe fumes/mist/ vapours – P301: If swallowed: – P312: Call a poison centre or doctor/ physician if you feel unwell – P330: Rinse mouth
Never use methanol or isopropanoltype antifreeze.
2.3 – Electrical characteristics This alternator is a machine without sliprings or revolving armature brushes, wound as “mixed pitch”, 4-wire, with class H insulation and a field excitation system available in Shunt version (see connection diagram on next page and D550 AVR manual). · Electrical accessories – Stator temperature detection sensors
Glycol (or Ethylene glycol) type antifreeze is a hazardous product which is harmful to health.
1 20
SGH07
SGH08
SIMDUT D2A NFPA 704
Risks: – H302: Harmful if swallowed
– H373: May cause damage to organs through prolonged or repeated exposure
5
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
· SHUNT 4-wire
Exciter field
5+
6-
10 9
X2 X1
5+ 6-
F+ F-
++-
1 23
UVW
U
1
8 7
STATOR
V
WN
2
18 17
3 28
27
0V DO1 DO2 DO3
46 45 47 48
S2U S1U S2V S1V S2W S1W
8 7 18
17 28
27
103
RTD1 104 PT100
113
RTD2 114 PT100
123
RTD3 124 PT100
4 1
Harting connector H1
-++
31 31 50 50
36
…
44 30 30
46 45 47 48
DCL
ALM 32 … 35
143 144 CTP 190° 133 134 CTP 180°
30 50
Harting connector H2
32 35 31
36 44 30
10 9 4 1
10 9 4 1
6
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
3 – INSTALLATION Personnel undertaking the various operations indicated in this section must wear personal protective equipment appropriate for mechanical and electrical hazards.
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. · Handling The parts intended for lifting are largely dimensioned and allow the manipulation of the alternator alone. They must not be used to lift the genset. The choice of lifting hooks or handles should be determined by the shape of the parts. Choose a lifting system which respects the integrity and the environment of the machine.
· Location
The location where the alternator is placed must be ventilated to ensure that the ambient temperature cannot exceed 90°C.
3.2 – Checks prior to first use · Electrical checks
Disconnect the three phases at the generator terminals.
WARNING
All accessories must be disconnected (AVR, EMC filter, etc.). Refer to the electrical schematics to identify the accessories to disconnect.
The measurement has to be taken between one phase and the earth. The reading is taken after 1 minute of test.
Test Criteria voltage (M ; (VDC) 40°C)
Stator: U 1 kV
500
5
Rotor
500
5
Exciter (stator and rotor)
500
5
Excitation auxiliary windings (AREP)
250
5
PMG (stator)
100
5
Heating element
500
5
Temperature sensors
500
5
IEEE 43 recommendations
If the insulation resistance is not measured
with a tested element à 40°C, a corrective factor has to be used.
Rm 40°C= Rt x Kt40 Rt Measured insulation resistance Kt40 Corrective factor
· Double-bearing coupling – Semi-flexible coupling Careful alignment of the machines is recommended, checking that the lack of concentricity and parallelism of both parts of the coupling do not exceed 0.1 mm. This alternator has been balanced with a 1/2 key.
7
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
There is possible method for restoring the above minimum values, dry out the machine for 24 hours in a drying oven at a temperature of 110 °C.
WARNING
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: – the cooling circuit of water is done, – all fixing dismantled bolts are tight, and that there are no leaks on the water inlet and outlet, – the length and tightening torque of the added bolts are correct.
WARNING
At the first start-up or after an extended shutdown, allow the machine to be purged.
3.3 – Terminal connection
Any intervention on the alternator terminals during checks should be performed with the machine stopped. · Connection checks
Electrical installations must comply with the current legislation in force in the country of use. Check that: – the residual circuit-breaker conforms to legislation on protection of personnel, in force in the country of use, and has been correctly installed on the alternator power output as close as possible to the alternator, – any protection devices in place have not been tripped.
– The alternator earth terminal is located on the frame of the machine. – The earth terminal is connected to the frame.
3.4 – Commissioning
The machine can only be started up and used if the installation is in accordance with the regulations and instructions defined in this manual. The machine is tested and set up at the factory. When first used with no load, make sure that the drive speed is correct and stable (see the nameplate). On application of the load, the machine should achieve its rated speed and voltage. If the machine still operates incorrectly, the cause of the malfunction must be located (see section 4.6). 3.5 – Setting up
The various adjustments during tests must be made by a qualified engineer. Ensure that the drive speed specified on the nameplate is reached before commencing adjustment.
8
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
4 – SERVICING – MAINTENANCE 4.1 – Safety measures Servicing or troubleshooting must be carried out strictly in accordance with instructions so as to avoid the risk of accidents and to maintain the machine in its original state.
All such operations performed on the alternator should be undertaken by personnel trained in the commissioning, servicing and maintenance of electrical and mechanical components, who must wear personal protective equipment appropriate for mechanical and electrical hazards. Before any intervention on the machine, ensure that it cannot be started by a manual or automatic system and that you have understood the operating principles of the system. Also check that no liquid is leaking from the cooling circuit.
Warning : During and after running, the alternator will reach temperatures hot enough to cause injury, such as burns.
4.2 – Routine maintenance
· Checks after start-up After approximately 20 hours of operation, check that all fixing screws on the machine are still tight, plus the general state of the machine and the various electrical connections in the installation.
· Electrical servicing Commercially-available volatile degreasing agents can be used.
WARNING
Do not use: trichlorethylene, perchlorethylene, trichloroethane or any alkaline products.
These operations must be performed at a cleaning station, equipped with a vacuum system that collects and flushes out the products used. The insulating components and the impregnation system are not at risk of damage from solvents. Avoid letting the cleaning product run into the slots. Apply the product with a brush, sponging frequently to avoid accumulation in the housing. Dry the winding with a dry cloth. Let any traces evaporate before reassembling the machine.
· Mechanical servicing Check regularly that no liquid is leaking from the cooling circuit. Degreasing: Use a brush and detergent (suitable for paintwork). Dusting: Use an air gun. If the machine is fitted with air inlet and outlet filters, the maintenance personnel should clean them routinely at regular intervals. In the case of dry dust, the filter can be cleaned using compressed air and/or replaced if it is clogged. After cleaning the alternator, it is essential to check the winding insulation (see sections 3.2 and 4.6).
9
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
4.3 – Bearings
Permanently greased bearings
Bearings life (depending on use): 20,000 hours or 3 years (grease life)
4.4 – Cooling circuit Composition Maintenance
Water, anticorrosion oxygen inhibitor, glycol-type antifreeze up to 50%
– Coolant change interval = 20,000 hours or 2 years maximum (the first of two who is reached)
– pH of water = 7<pH<8
4.5 – Mechanical defects
Fault
Bearing
Excessive overheating of one or both bearings (bearing temperature 80°C above the ambient temperature)
Excessive overheating of Abnormal alternator frame (more than temperature 40° C above the ambient
temperature)
Vibrations
Too much vibration
Excessive vibration and humming noise coming from the machine
Abnormal noise
Alternator damaged by a significant impact, followed by humming and vibration
Action/Cause
– If the bearing has turned blue or if the grease has turned black, change the bearing.
– Bearing not fully locked (abnormal play in the bearing cage) – End shields incorrectly aligned
– Alternator operating at too high a voltage (>105% of Un on load) – Alternator overloaded
– Misalignment (coupling) – Defective mounting or play in coupling – Rotor balancing fault (Engine – Alternator)
– Phase imbalance – Stator short-circuit
– System short-circuit
Possible consequences – Broken or damaged coupling – Broken or bent shaft end – Shifting and short-circuit of main field – Fan fractured or coming loose on shaft – Irreparable damage to rotating diodes/AVR, surge suppressor
10
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
4.6 – Electrical faults
Fault
Action/Cause
No voltage at no load on start-up
– Connect a new battery of 4 to 12V to terminals E- and E+, respecting the polarity, for 2 to 3 seconds.
Restart the system and check if the problem is fixed. If the problem is still present, follow the actions associated with the fault below.
– Check the speed – Check the presence of 24V on the AVR – Check for the presence of an AVR fault (overload, overspeed or
overvoltage)
– Voltage too low or too high – Voltage disappears during operation
If none of the above actions corrected the problem, reset the AVR by shutting down the machine and turning off the 24V supply to the AVR for 20 seconds. Restart the system and check if the problem is fixed.
If the problem is still present: – Check the fuses – Check the wiring (see section 2.3) – Measure the exciter winding, exciter armature, revolving field
coil, stator resistances and check the insulation – Check diodes and surge suppressor
If no cause of the failure is detected, contact us.
11
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
· Checking the winding
You can check the winding insulation by performing a high voltage test. In this case, you must disconnect all AVR wires.
WARNING
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 the current to flow only in the anode-tocathode direction.
A
Anode C C C
C
Cathode
+
–
A A A
AC
+ ~~~ +
– ~~~ –
C C C
+
–
A A A
AC
· Checking the windings and rotating diodes using separate excitation
Assembly A: Connect a 12 V battery in series with a rheostat of approximately 50 ohms – 300 W and a diode on both exciter field wires (5+) and (6-).
ASSEMBLY A
6 – Field
5 +
1A diode Rh. 50 -300W
+ –
12V battery
Assembly B: Connect a “Variac” variable power supply and a diode bridge on both exciter field wires (5+) and (6-). Both these systems should have characteristics which are compatible with 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 from the AVR or its associated wiring (ie. sensing, auxiliary windings).
During this procedure, make sure that the alternator is disconnected from any external load and inspect the terminal box to check that the connections are fully tightened.
1) Stop the unit, disconnect and isolate the AVR wires. 2) There are two ways of creating an assembly with separate excitation.
ASSEMBLY B
40 50 60
10 20 30
70 80 90
100
0
Variac
AC 220V
6 – Field +
5 + 1A diode
DC –
12V
12
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
4.7 – Dismantling, reassembly
WARNING
During the warranty period, this operation should only be carried out in an approved workshop or in our factory, otherwise the warranty may be invalidated. Whilst being handled, the machine should remain horizontal (rotor not locked when moved). Check how much the machine weighs before choosing the lifting method.
– The cooling circuit must be drained using a fluid recovery system.
Toxic risk
The coolant can contain up to 50% glycol-type antifreeze, which represents a risk to health.
· Access to diodes – Place the machine vertically. – Remove the coupling bell (31). – Remove the washer (8). – Remove the DE bracket (30) screws. – Fix an M16 shackle on the shaft. – Remove the rotor assembly (4). – The diodes (110) are now accessible.
· Replacing the NDE bearing
Dismantling – Remove the NDE bracket (36) screws. – To remove the NDE bracket (36), use 2 M6 screws in the threaded hole provided. – Remove the NDE bearing (70) using a screw puller.
· Tools required To fully dismantle the machine, we recommend using at least the tools listed below: – 1 ratchet spanner + extension – 1 torque wrench – 1 set of flat spanners: 7, 8, 10, 12 mm – 1 socket set: 8, 10, 13, 16, 18, 21, 22, 24 mm – 1 Allen key: size 5 (eg. Facom: ET5), size 6 (ET6), size 10 (ET10, size 14 (ET14) – 1 socket TORX bit T20 and T30 – 1 puller (U35)/(U32/350)
· Screw tightening torque See section 5.4.
· Draining the cooling circuit – Leave the machine stationary for 6 hours before draining the cooling circuit (operating temperature 85°C).
Reassembly
– Heat the inner slipring of a new bearing by
induction or in a drying oven at 110°C (do not use an oil bath) and fit it to the machine. – Place the preloading wavy washer (79) in the NDE bracket (36).
13
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
WARNING
When dismantling the brackets, you will need to change the antifriction bearings and the preloading (wavy) washer.
· Replacing the DE bearing
Dismantling
– Remove the Rotex coupling (16) with a puller. – Remove the gamma seal (7) that needs to be replaced. – Remove the inner bearing retainer (68) screws. – Remove the DE bracket (30) screws. – To remove the DE bracket (30), use 2 M6 screws in the threaded hole provided. – Remove the DE bearing (60) using a screw puller.
4.8 – Table of characteristics
Table of average values: Alternator – 2 poles – 50 Hz – Standard winding No. 6S (4-wire) (400V for the excitation values). The voltage and current values are given for
no-load operation and operation at rated load with separate field excitation. All values are given at ± 10% and may be changed without prior notification (for exact values, consult the test report).
· Resistances at 20 °C () Main armature
Type L7
Three-phase
Stator L/N
Rotor
0.0465
0.661
Exciter
Type L7
SHUNT
Blue/white wires exciter field
Exciter field
Exciter armature
4.23
0.160
Reassembly – Heat the inner slipring of a new bearing by induction or in a drying oven at 110°C (do not use an oil bath) and fit it to the machine.
· Accessing the revolving field coil and stator
Dismantling – Follow the procedure for accessing the diodes.
Reassembling the revolving field coil – Follow the dismantling procedure in reverse order. – Take care not to knock the windings when refitting the rotor in the stator. – Use DowsilTM 7093 silicone to seal.
· Field excitation currents 400V / 50 Hz (A)
Type L7
Three-phase
SHUNT
Blue/white wires exciter field
No load
At rated load
0.49
2.4
· Table of weights (kg) (maximum values given for information only)
Type L7
Total weight 365
Rotor 90
After operational testing, it is essential to replace all access panels or covers.
14
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
5 – SPARE PARTS 5.1 – First maintenance parts Here is the list of parts:
Two-bearing kit
Drive end bearing 40062343 Non drive end bearing 40062340 Preloading (wavy) washer
5324582
Relay card kit
40062351
Complete crescents equipped with diodes
Diodes: 3 direct + 3 reverse
4061237
Surge suppressor
4691056
AVR D550
5157122
5.2 – Technical support service
Our technical support service will be pleased to provide any additional information you may require.
After operational testing, it is essential to replace all access panels or covers.
5.3 – Accessories · Temperature sensors with thermistors (PTC) These are thermistor triplets with a positive temperature coefficient installed in the stator winding (1 per phase). There are 2 triplets in the winding (at 2 levels: warning and trip). These sensors must be linked to adapted sensing relays (supplied optionally). Cold resistance of cold thermistor sensors: 100 to 250 per sensor.
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
complete 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.
15
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
5.4 – Exploded view, parts list and tightening torque
16
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
Ref. Qty
Description
1 1 Stator assembly
Screw Ø
Torque N.m
Ref.
Qty
Description
–
– 67 1 Circlips
Screw Torque Ø N.m
–
–
4 1 Rotor assembly
–
–
68 1 Inner bearing retainer M6
8
7 1 Gamma seal 8 1 Washer
–
–
70
1
Non drive end (NDE) bearing
–
–
M16 170 79
1
Preloading (wavy) washer
–
–
9 1 Washer
M12 69 90 1 Exciter field (stator)
M6
8
10 1 DE lifting support
M12
69
100
1
Exciter armature (rotor)
–
–
11 1 Handling support
M10 40 107 1 Diode bridge support M5
5
15 1 Fan
–
– 110 6 Diode
1/4″ 4
16 1 Rotex coupling
–
– 125 4 Connection terminal M8 10
19 1 Spacer
–
– 132 1 Terminal box body
M5
5
21 1 Lifting eye
M10 40 136 1 Terminal box cover
M5
5
22 1 Shaft extension key –
– 172 4 Isolator
M8 20
28 1 Earth terminal
30
1
Drive end (DE) bracket
31 1 Coupling bell
36
1
Non drive end (NDE) bracket
59 1 Inspection door
60
1
Drive end (DE) bearing
M10 20 174 1 Support
M6
8
M10 40 175 1 Cover
M5
5
M10 40 176 1 Current transformer
–
–
M10 40 196 1 Auxiliary circuit board M5
5
M6
8
198
1
Voltage regulator (AVR)
M6
8
–
– 343 3 Diode bridge
M6
8
17
Nidec Power
Installation and maintenance
6102 en – 2024.10 / f
LSA 43.3 L7
Low Voltage Alternator – IC7 – 2 poles
Disposal and recycling instructions
We are committed to limiting the environmental impact of our activity. We continuously monitor our production processes, material sourcing and product design to improve recyclability and minimise our environmental footprint. These instructions are for information purposes only. It is the user’s responsibility to comply with local legislation regarding product disposal and recycling.
Recyclable materials Our alternators are mainly constructed from 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 department can provide detailed directions on how to dismantle products on request.
All materials listed above need special treatment to separate waste from reclaimable materials and should be entrusted to specialist recycling companies.
The ociol oalanndt, groeilasaendfrogmretahsee lufrbormicattihoen sluybsrtiecmatiosnhosuyldstebme strheoauteldd baes threaazaterdoaus whaazsaterdaonuds mwaustebeantdreamteudstinbeactcreoardteadncine wacitcholrodcaanlcleegwisiltahtilonca. l legislation.
Our alternators have a specified lifetime of 20 years. After this period, the operation of the product should be stopped, regardless of its condition. Any further operation after this period will be under the sole responsibility of the user.
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.
18
Service & Support
Our worldwide service network of over 80 facilities is at your service. Our local presence is your 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 alternators operations, providing the best value service to optimize your cost of ownership.
How can we help:
Life Extension
· Reconditioning · System upgrade
Design
· Consulting and specifications
· Maintenance contracts
Start-up
· Commissioning · Training
Optimisation
· Monitoring · System audit
Operations
· 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
service.epg@leroy-somer.com
Scan the code or go to: www.lrsm.co/support
www.nidecpower.com
Connect with us at:
6102 en – 2024.10 / f
Documents / Resources
 |
Nidec Power LSA 43.3 L7 Low Voltage Alternator [pdf] Installation Guide LSA 43.3 L7 Low Voltage Alternator, LSA 43.3 L7, Low Voltage Alternator, Voltage Alternator, Alternator |
