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INSTALLATION AND MAINTENANCE

LSA 46.2 / 47.1 - 4 POLE

ALTERNATORS

SERVICING - MAINTENANCE

Ref. 2981 GB - 4.33/b - 07.02

LEROY-SOMER

4.5.1 - Checking the winding

You can check the winding insulation by performing a high
voltage test. In this case, you must disconnect all AVR wires.

Damage caused to the AVR in such conditions is
not covered by our warranty.

After operational testing, replace all access panels
or covers.

4.5.2 - Checking the diode bridge

Fault

Action

Effect

Check/Cause

Voltage too
low

Check the drive speed

Correct speed

Check the AVR connections (possible AVR
failure)
- Field windings short-circuited
- Rotating diodes burnt out
- Main field winding short-circuited - Check the
resistance

Speed too low

Increase the drive speed. (Do not touch the AVR
voltage pot. (P2) before running at the correct
speed.)

Voltage too
high

Adjust AVR voltage
potentiometer

Adjustment ineffective

Faulty AVR

Voltage
oscillations

Adjust AVR stability
potentiometer

If no effect : try normal / fast
recovery modes (ST2)

- Check the speed : possibility of cyclic irregularity
- Loose connections
- Faulty AVR
- Speed too low when on load (or LAM set too
high)

Voltage
correct
at no load and
too low when
on load

Run at no load and
check the voltage
between E+ et E- on the
AVR

Voltage between E+ and E- (DC)
AREP / PMG < 10V

- Check the speed (or LAM set too high)

Voltage between E+ and E-
AREP / PMG > 15V

- Faulty rotating diodes
- Short-circuit in the main field. Check the
resistance- Faulty exciter armature. Check the
resistance.

Voltage
disappears
during
operation

Check the AVR, the
surge suppressor, the
rotating diodes, and
replace any defective
components

The voltage does not return to the
rated value.

- Exciter winding open circuit
- Faulty exciter armature
- Faulty AVR
- Main field open circuit or short-circuited

WARNING

ARNING

DIODE BRIDGE

A n o d e

C a t h o d e

C C C

A A A

C C C

A A A

A diode in good
working order must
allow the current
to flow from the anode
to the cathode only.

Содержание LSA 46.2

Страница 1: ...This manual is to be given to the end user LSA 46 2 47 1 4 POLE ALTERNATORS 343 107 100 347 78 37 349 70 323 34 4 28 18 33 466 Installation and maintenance Ref 2981 GB 4 33 b 07 02 ...

Страница 2: ...ols Warning symbol for an operation which may damage or destroy the machine or surrounding equipment Warning symbol for general danger to personnel Warning symbol for electrical danger to personnel Note LEROY SOMER reserves the right to modify the characteristics of its products at any time in order to incorporate the latest technological developments The information contained in this document may...

Страница 3: ...ing Special type of use 4 SERVICING MAINTENANCE 14 Safety measures Regular maintenance Checks after start up Cooling circuit Bearings Electrical servicing Mechanical servicing Fault detection Mechanical defects Electrical faults Checking the winding Checking the diode bridge Checking the windings and rotating diodes using separate excitation Dismantling reassembly Tools required Screw tightening t...

Страница 4: ...The alternator is identified by means of a nameplate fixed on the frame see drawing Make sure that the nameplate on the machine conforms to your order The machine name is defined according to various criteria for example LSA 46 2 M6 C6 4 LSA name used in the PARTNER range M Marine C Cogeneration T Telecommunications 46 2 machine type M5 model C excitation system C AREP J SHUNT or PMG E COMPOUND 6 ...

Страница 5: ...eaters 2 2 Mechanical characteristics Steel frame Cast iron end shields Ball bearings greased for life Mounting arrangement IM 1201 MD 35 single bearing with standard feet and SAE flanges coupling discs IM 1001 B 34 two bearing with SAE flange and standard cylindrical shaft extension Drip proof machine self cooled Degree of protection IP 23 2 2 1 Options Air inlet filter Greasable ball bearings IP...

Страница 6: ...shunt power supply max 140V 50 60 Hz rated overload current 10A 10s electronic protection overload voltage detection opening short circuit excitation overload current for 10 s then return to approximately 1A The alternator must be stopped or the power switched off see section 3 5 3 in order to reset the protection Fuse F1 on X1 X2 voltage detection 5 VA isolated via transformer 0 110 V terminals 9...

Страница 7: ...el operation of 1 A 2 5 VA CL 1 See the diagram included with this manual Remote voltage adjustment potentiometer 470 Ω 3 W min adjustment range 5 range limited by internal voltage potentiometer P2 Remove ST4 to connect the potentiometer A 1 k Ω potentiometer can also be used to extend the adjustment range by 10 R 731 module detection of 3 phase voltage 200 to 500V compatible with parallel operati...

Страница 8: ...t not only the recycling of hot air from the machine or engine but also exhaust fumes 3 2 Inspection prior to first use 3 2 1 Electrical checks Under no circumstances should an alternator new or otherwise be operated if the isolation is less than 1 megohm for the stator and 100 000 ohms for the other windings There are three possible methods for restoring these minimum values a Dry out the machine...

Страница 9: ... T12 T10 T4 T9 T3 T6 T11 T5 T2 T8 L2 V Voltage LM 1 2 voltage LL R 448 voltage detection 0 T3 220 V T2 L1 U L2 V L3 W NDE Winding 60 Hz 50 Hz 380 415 380 480 440 600 380 416 R 448 voltage detection 0 T3 380 V T2 NDE L1 U LSA 46 2 47 1 12 WIRE LSA 46 2 47 1 12 WIRE LSA 46 2 12 WIRE LSA 46 2 47 1 12 WIRE L1 U L2 V L2 V L3 W L1 U L2 V L3 W 1 phase 1 phase or 3 phase FF Winding 60 Hz 50 Hz 220 240 220...

Страница 10: ...tection 0 T3 220 V T2 Operating phases L2 V L3 W single phase 380 415 380 480 6S 7S 8S 6S 7S 8S 220 240 220 277 240 254 220 240 9S 600 R 448 voltage detection 0 T3 380 V T2 Winding 9 R 448 voltage detection transformer See specific diagram In case of reconnection ensure that the AVR voltage detection is correct R 791 T interference suppression kit standard for CE marking LSA 46 2 6 wire Current tr...

Страница 11: ...etting Check whether strap ST4 or the remote adjustment potentiometer have been connected Optional operating modes Strap ST1 cut to connect the R 731 3 phase detection module Strap ST2 cut for rapid response time Strap ST5 cut to suppress the LAM function 3 4 Commissioning The machine can only be started up and used if the installation has been set up in accordance with the regulations and instruc...

Страница 12: ...rom that observed previously approximately 15 l Readjust the speed of the unit to its rated no load value Adjustments in parallel operation Before any intervention on the alternator make sure that the speed droop is identical for all engines m Preset for parallel operation with C T connected to S1 S2 on connector J2 Potentiometer P1 quadrature droop in centre position Apply the rated load cos Ø 0 ...

Страница 13: ...clockwise until the required max current is obtained no more than 10 A Checking the internal protection Open switch D the excitation current should increase to its preset ceiling remain at that level for 10 seconds and then drop to 1A To reset switch off the power supply by opening switch A Note After setting the excitation ceiling as described adjust the voltage again see section 3 5 2 via P2 In ...

Страница 14: ...ped and checks carried out 4 2 4 Electrical servicing Cleaning product for the windings Do not use trichlorethylene perchlorethylene trichloroethane or any alkaline products Certain strictly defined pure volatile degreasing products can be used such as Normal petrol without additives Toluene slightly toxic inflammable Benzene or benzine toxic inflammable Ciclohexare non toxic inflammable Cleaning ...

Страница 15: ...ting at too high a voltage 105 of Un on load Alternator overloaded Vibrations Too much vibration Misalignment coupling Defective mounting or play in coupling Rotor balancing fault Engine Alternator Excessive vibration and humming noise coming from the machine Phase imbalance Stator short circuit Abnormal noise Alternator damaged by a significant impact followed by humming and vibration System shor...

Страница 16: ...neffective Faulty AVR Voltage oscillations Adjust AVR stability potentiometer If no effect try normal fast recovery modes ST2 Check the speed possibility of cyclic irregularity Loose connections Faulty AVR Speed too low when on load or LAM set too high Voltage correct at no load and too low when on load Run at no load and check the voltage between E et E on the AVR Voltage between E and E DC AREP ...

Страница 17: ...port 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 4 6 Dismantling reassembly see sections 5 4 1 5 4 2 During the warranty period this operation should only be carried out in an approved LEROY SOMER workshop or in ou...

Страница 18: ... DE bearing on two bearing machines Remove the screws 31 and 62 Remove the shield 30 Remove the circlips 284 Remove the ball bearing 60 using a puller with a central screw Fit the new bearing after heating it by induction to approximately 80 C When dismantling the machine always change the bearings 4 6 7 Complete dismantling Remove the DE shield 30 as described in section 4 6 6 Support the DE roto...

Страница 19: ...he 4 HM6 screws 3 Put adhesive on the tie rod 295 and screw it fully into the tapped hole in the alternator shaft extension 4 Mount the magnetised rotor on the adaptation shaft then using 2 M10 threaded rods screwed into the rotor slide the assembly onto the tie rod 5 Once the rotor is in position remove the 2 M10 rods 6 Fit the cable gland washer 296 7 Tighten the assembly with the M16 nut 8 Clos...

Страница 20: ...ols i exc excitation current of the exciter field For 60 Hz machines the i exc values are approximately 5 to 10 lower 4 8 3 Voltage of auxiliary windings at no load LSA 46 2 Stator L N Rotor Field Armature M3 0 022 0 23 8 8 0 035 M5 0 0182 0 24 8 8 0 035 L6 0 0148 0 264 8 8 0 035 L9 0 012 0 295 8 8 0 035 VL12 0 0085 0 343 10 0 037 LSA 46 2 Auxil wdg X1 X2 Auxil wdg Z1 Z2 M3 0 24 0 4 M5 0 215 0 36 ...

Страница 21: ...are thermistor triplets with a positive temperature coefficient installed in the stator winding 1 per phase There can be a maximum of 2 triplets in the windings at 2 levels warning and trip and 1 or 2 thermistors in the shields These probes must be linked to appropriate detection relays supplied optionally Cold resistance of thermistor probes 100 to 250 Ω per probe 5 3 3 Connection accessories 6 w...

Страница 22: ...eld 297 1 End plate 37 4 Fixing screw 320 1 Coupling sleeve 41 1 Cover front panel 321 1 Sleeve key 48 1 Cover top panel 322 3 Coupling disc 49 Cover screws 323 6 Fixing screw 51 1 Air intake louvre 325 Spacer shim 53 1 Plug 343 1 Diode bridge assembly 70 1 NDE bearing 347 1 Protection varistor PCB 71 1 Outer bearing retainer 349 1 O ring 78 1 Inner bearing retainer 364 1 AVR support 79 1 Preloadi...

Страница 23: ...racket 28 1 Earth terminal 198 1 Voltage regulator AVR 30 1 DE shield 284 1 Circlips 31 6 or 4 Fixing screw 290 1 PMG housing 33 1 Fan guard 291 1 Adaptation shaft 34 2 Fixing screw 292 1 Magnetic rotor 36 1 Exciter end shield 293 1 Stator 37 4 Fixing screw 294 2 Fixing screw 41 1 Cover front panel 295 1 Tie rod 48 1 Cover top panel 296 1 Cable gland washer nut 49 Cover screws 297 1 End plate 51 1...

Страница 24: ...MOTEURS LEROY SOMER 16015 ANGOULÊME CEDEX FRANCE Imprimerie MOTEURS LEROY SOMER RC ANGOULEME B 671 820 223 ...

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