Three Phase Synchronous Generators FRAME SIZES INDUSTRIAL / MARINE APPLICATIONS

Transcription

1 Three Phase Synchronous Generators FRAME SIZES INDUSTRIAL / MARINE APPLICATIONS MarelliGenerators SIN.CT GB

2 GENERATING SATISFACTION MarelliGenerators is a division of Marelli Motori SpA, an internationai manufacturer of electrical machines. MarelliGenerators offers a complete selection of low and medium voltage threephase synchronous generators for continuous prime power and standby power applications. Whatever your needs, our qualified engineers will offer the best soilutions to suit your requirements. High efficiency, lifeiong reliability and in compliance with the international standards give MarelliGenerators the right to be a worldwide leader. APPLICATION FIELDS MarelliGenerators offers the best technical solutions for the applications you need. The main application fields are: general industry, prime power, cogeneration, UPS, marine, petrochemical and hydroelectric. RELIABILITY Long life endurance of electrical components and housing. Generators are impregnated with highgrade resin by a VPI process and an additional protection against tough environmental conditions. Generous design allowances to ensure reliability under difficult operating conditions. PERFORMANCE Active parts are designed by using the latest technologies and the best materials available to guarantee high efficiency values. TOTALLY CUSTOMISABLE All generators are completely customisable. Nominal voltage from 380 to 13. Volts. Polarities not mentioned in the following pages are available. Degree of protection up to IP 55. Auxiliary and neutral point terminal boxes. Single and double bearings solutions. Ball, roller or sleeve bearings are available. Equipped for vibration sensors. Three onboard neutral point current transformers (CT) are available both with either single or double core. Anticondensation heaters are available for all frame sizes. Wide range of sensors to monitor the temperature of the stator winding and the bearings. PERFORMANCE ENVELOPE poles INDUSTRIAL LOW VOLTAGE poles INDUSTRIAL MEDIUM VOLTAGE Nominal output [kva] 4 poles 10 MARINE LOW VOLTAGE Nominal output [kva] Hz 50Hz Nominal output [kva] MarelliGenerators

3 TECHNICAL INFORMATION STANDARDS The generators are designed in compliance with: IEC 00341; CEI EN 00341; BS 49900; VDE 0530, NF 5, 111; OVE M10; NEMA MG 1.22; UL 144, and UL1004B is available. MarelliGenerators bear the CE mark for all generators. Vibration level in accordance to IEC VOLTAGE AND FREQUENCY The generators can operate at 50 and 0 Hz. Frame Size MA 355 MB 500* *: medium voltage 500 Frame size Connection Series star Parallel star Series delta Star Delta Star (medium voltage) Star Star (medium voltage) Voltage at 50 Hz [V] Voltage at 0 Hz [V] EXCITATION SYSTEM The generators are selfexciting, by means of a brushless type excitation system. The voltage is maintained within ± 0,5% of the nominal value in steady state condition with a balanced and non distorting load. Auxiliary winding The excitation system of generators from frame sizes 200 to are fed by an auxiliary winding which gives a better response to the variation in loads and sustains the power supply in the case of a shortcircuit. Auxiliary winding on the 10 frame is available. Permanent Magnet Generators (PMG) Generators from frame sizes 225 to 50 can be supplied with a Permanent Magnet Generator (PMG) if required, which gives an independent supply to the excitation system. PMG is advisable for use with generators in particular applications such as unbalanced loads and distorting loads. Manual voltage regulation Available within ± 5% of the rated value by means of a potentiometer placed inside the voltage regulator. A remote voltage setting is possible by means of an external potentiometer, which can be supplied. Overexcitation protection Generators from frame sizes 10 to are supplied with adjustable overexcitation protection which will protect the alternator in the event of overexcitation when combined with an external protection system. Automatic Voltage Regulator (AVR) Generator frame size Standard On request AVR supply Voltage sensing Voltage remote control Radio interference suppressor Overexcitation device Parallel operation with the mains Parallel operation with similar generators Standard protections Limiters Functions ANALOGUE DIGITAL* M1FA55A MARK V M40FA40A MARK I M40FA10A MGC I M3FA310A MGC II M40FA44A MARK X M71FA MEC Single phase and Overexcitation Auxiliary winding, mains Three phase Single phase Arrangement Internal Arrangement for VARICOMP Arrangement for external device Arrangement Underfrequency Auxiliary inputs PMG Auxiliary winding, mains, PMG Overexcitation Three phase Arrangement for external filter Internal Internal Field overcurrent Field overvoltage Generator over/under voltage Generator overcurrent Loss of sensing Underfrequency Over/underexcitation PC interface Soft start Auxiliary inputs Contact inputs MarelliGenerators

4 WINDINGS Generators from frame sizes 10 to 500 for industrial application are supplied with 2/3 pitch winding to reduce the voltage harmonic content in applications with nonlinear Ioads. The noioad voltage waveform is sinusoidal with a residual harmonic 2%. Total Harmonic Distortion (THD) 2%. TELEPHONE INTERFERENCE The Telephonic Harmonic Factor (THF) is Iess than 2% as defined by IEC RADIO INTERFERENCE Radio interference conforms to Class B Group 1 as defined by EN55O11. THREE PHASE SHORT CIRCUIT CURRENT Generators with auxiliary windings or PMG ensure a three phase shortcircuit current (Icc) higher than 3 times the rated current (In): Icc > 3 In. Generators from 500 to 710 frame size are supplied with an overexcitation device VARICOMP which ensures a three phase short circuit current higher than 3 times the rated current. OVERLOADS The following overloads are allowed (only for continuous duty): 10% for 1 hour, 15% for 10 minutes, 30% for 4 minutes, 50% for 2 minutes. These overloads must be occasional and followed by at Ieast one hour of running at nominal Ioad or Iess. OPERATING CONDITIONS Single phase operation Three phase (wire) wound generators can be reconnected and derated to % for single phase operation (with a zigzag connection). Otherwise generators with dedicated (4wire) single phase windings can be supplied. Parallel operation All generators are provided with a largely sized damper cage and are suitable for parallel operation with other generators, when equipped with the paralleling unit. A power factor regulator is available. NoIoad operation at reduced speed All regulators work to reduce the excitation current in order to protect the excitation system when the generator is being used at reduced speed. Transient ratings The voltage drop due to the application of full load at 0,8 power factor inductive on industrial 10 frame size generators varies between 1 and 20% of the rated voltage: the output voltage recovers to within 3% of the rated value in less than 0,3 seconds. Altitude The rated outputs refer to installation up to m a.s.l. Above this level the following derating factors must be applied. Altitude (m asl) < < < < < K Factor 1,00 0,9 0,93 0,90 0,8 Ambient temperature The rated outputs given in this catalogue are based on a maximum ambient temperature of 40 C. When operating at different ambient temperatures the output rating can be obtained by applying the factors as in the following table. Ambient Temperature [ C] K Factor 1,04 1,00 1,00 0,9 0,93 0,90 Power factor The nominai power factor 0,8 lagging. For different power factor values the following derating factors must be applied. Power Factor K Factor 1,0 1,00 0,8 1,00 0,7 0,93 0, 0,88 0,5 0,84 0,3 0,82 0 0,80 MarelliGenerators

5 INSULATION, IMPREGNATION AND PROTECTIVE TREATMENT OF WINDING Class H insulation system. The generators are impregnated with high grade resin, using the Iatest technologies (VPI). A further protective treatment is applied on the whole range, making the generators suitable for tough environmental conditions. Special degrees of protection and tropicalisation are available. PROTECTION DEGREE The standard protection degree is IP 23. Generators can be supplied wjth protection degree IP 55. Higher protection degrees are available for frame sizes 250 to 710 through the application of airtoair or airtowater heat exchangers. VENTILATION AND DIRECTION OF ROTATION Generators are axially selfcooled and can run in both directions of rotation. Air inlet is: Radial Frame size 10. Advanced axial + radial Frame sizes AxiaI + radial Frame radial sizes 710. ROTOR BALANCING Rotors are dynamically balanced with a half key applied to the shaft extension in accordance with IEC to vibration grade normal (N) in standard configuration. Generators can be supplied with reduced (R) or special (S) vibration Ievels. BEARINGS AND OVERSPEED Generously oversized roller bearings. The permissible overspeed is 1,5 times the rated speed (referred to 50 Hz). Sleeve bearings from to 710 frame sizes are available. SPECIFICATION All specifications are correct at time of publication and are subject to change without notice. MarelliGenerators

6 INDUSTRIAL APPLICATION / LOW VOLTAGE 50/0Hz Type Leads kva Temperature rise / Ambient temp. [ C] Continuous duty 5 / / 40 T cl. H Standby 13 / / 40 Efficiency 5 / 40 pf = 0,8 4/4 [%] kva Temperature rise / Ambient temp. [ C] Efficiency Inertia Weight Continuous duty 5 / / 40 T cl. H Standby 13 / / 40 5 / 40 pf = 0,8 4/4 [%] B3 Approx. [kgm 2 ] Approx. [kg] 4 pole 50Hz min 1 0Hz 1. min 1 MJB 10 SA4 10 SB4 10 SC4 10 MA4 10 MB4 17,0 20,0 23,0 28,0 32,0 15, 18,4 21,1 25,7 29,4 18,7 22,0 25,3 30,8 35,2 18,0 21,2 24,4 29,7 33,9 85, 87,4 87,5 88,2 88,3 21,4 24,7 29,9 34,2 40,0 19,7 22,7 27,5 31,4 3,7 23,5 27,2 32,9 37, 44,0 22,7 2,2 31,7 3,3 42,4 8,4 88,2 88,3 89,2 89,1 0,109 0,4 0,135 0,10 0, SA4 200 SB4 200 MA4 200 MB4 42,0 48,0 2,0 72,0 38,5 44,0 57,0,0 4,0 53,0 8,0 80,0 44,5 51,0 5,5 7,5 88,5 88,7 90,1 90,5 51,0 59,5 7,0 87,0 4,8 54, 9,7 79,8 5,0 5,5 83,5 54,0 3,0 80,5 92,0 89,5 89,3 90,7 90,9 0,275 0,301 0,31 0, SA4 225 SB4 225 MA4 225 LA4 250 MA4 250 MB4 250 LA4 250 LB ,0 91,5 91,8 92,2 92,9 93,0 93,2 93, ,5 92,0 92, 93,0 93, 93, 93,9 93,9 0,32 0,98 0,789 0,924 1,41 1, 1,89 2, SA4 315 SB4 315 MA4 315 MB ,1 93,4 93,7 94, ,8 94,0 94,2 94,8 3, 4,25 4,80 5, SA4 355 SB4 355 MA4 355 MB ,0 94, 94, ,5 95,3 7,97 9,29 11,9 13, MA4 MB4 LA4 LB ,2 95,3 95, ,0 9,3 1,3 17,0 19,3 22, MB4 LA4 LB ,0 9, ,3 9,3 9,4 29,0 34,0 38, SC4 500 MB4 500 LA4 50 MA4* 50 LA4* ,1 9,2 9,4 9,4 9, ,5 9,5 9,7 9,5 9, 4,7 52,5 1, SA4* 30 MB4* 30 LA4* ,2 9,4 9, ,5 9,7 9, SC4** 710 MB4** ,2 9, ,5 9,7 *: 90 V recommended **: 90 V only. For different voltages please contact MarelliMotori. Ratings refer to following conditions: balanced nondeforming load, altitude below m asl, minimum power factor 0,8.

7 INDUSTRIAL APPLICATION / LOW VOLTAGE 50/0Hz pole Type MJB SA SB SC MA MB LA LB Leads kva Temp. Rise / Ambient temp. [ C] Continuous duty 5 / / 40 T cl. H Efficiency 5 / 40 pf = 0,8 4/4 [%] Continuous duty 5 / / 40 T cl. H 50Hz min 1 0Hz min , 92,9 93, 94,0 94,2 94,5 94, kva Temp. Rise / Ambient temp. [ C] Efficiency 5 / 40 pf = 0,8 4/4 [%] 93,0 93,4 94,0 94,4 94, 94,9 Inertia B3 Approx. [kgm 2 ] 11,8 14,1 1,8 17,9 19,4 20,9 24,2 Weight Approx. [kg] MB LA LB ,8 94, , 49,9 55,0 1, SC 500 MB 500 LA ,9 95, , 9,0 4,7 73, 88, MA 50 LA 30 SC 30 MA* 30 LA* 710 SC* 710 MA* ,0 9,2 9, ,0 9,2 9,0 9,2 9, pole MJB SA8 SB8 SC8 MA8 MB8 LA8 LB8 50Hz 750 min 1 0Hz min ,5 92,0 92,3 92,5 93,0 93,2 93, ,0 92,5 92,8 93,0 93,5 93,7 94,0 13,5 1,2 19,1 20, 22,4 24,1 25, SA8 500 SC8 500 MB8 500 LA ,5 95, , 55,1 74,2 82, MA8 50 LA8 30 SC8 30 MA8 30 LA , 9, , 9,2 9, SA8* 710 SC8* 710 MA8* 710 MB8* pole 50Hz 00 min 1 0Hz 720 min 1 MJB 500 SA SC MB LA ,9 94,2 94, ,4 94,7 95,2 3,8 81, 89, SC10 30 MA10 30 MB10 30 LA SC MA10* 710 MB10* 710 LB10* ,0 9, pole 50Hz 500 min 1 0Hz 00 min 1 MJB 30 SC 30 MA 30 MB 30 LB 710 SA 710 MA 710 LA* , ,0 9, *: 90 V recommended Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0,8.

8 MARINE APPLICATION / LOW VOLTAGE 50/0Hz 4 pole MJBM 10 SA4 10 SB4 10 SC4 10 MA4 10 MB4 200 SA4 200 SB4 200 MA4 200 MB4 225 SA4 225 SB4 225 MA4 225 LA4 250 MA4 250 MB4 250 LA4 200 LB4 315 SA4 315 SB4 315 MA4 315 MB4 355 SA4 355 SB4 355 MA4 355 MB4 MA4 MB4 LA4 LB4 MB4 LA4 LB4 pole Type 500 SC4 500 MB4 500 LA4 50 MA4 50 LA4* 30 SA4* 30 MB4* 30 LA4* 710 SC4** 710 MB4** MJBM SA SB SC MA MB LA LB MB LA LB 500 SC 500 MB 500 LA 50 MA 50 LA 30 SC* 30 MA* 30 LA* 710 SC* 710 MA* Leads kva Temp. Rise / Ambient temp. [ C] 50Hz min 1 0Hz 1. min 1 14,8 17,4 20,1 24,4 27,9 3,5 42,0 54,0 3, ,7 14,9 17,3 20,9 23,9 31,3 3,1 4,4 54, : Not available *: 90 V recommended **: 90 V only. For different voltages please contact MarelliMotori. Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0, ,9 82,3 83,9 85,5 8,1 8,0 87,2 88,3 89,5 89,0 89,4 90,2 91,2 91,8 92,1 92,3 92, 92,0 92,5 93,1 93,5 93, 93,9 94,5 94,8 94,8 95,2 95,3 95, 95, 9, 97, 9,1 9,3 9,5 9,3 9,5 9, 9,3 9,5 17, 20,5 24,1 28,9 33,5 44,5 52,0 4,0 7, ,1 17, 20,7 24,8 28,7 38,2 44, 54,9 5, Hz min 1 0Hz min Continuous duty 95 / / Airtowater exchanger 95 / Efficiency 95 / 50 pf = 0,8 4/4 [%] 92,7 93,0 93,7 94,1 94,3 94, 94,8 94, 95,2 95,2 9,0 9,2 9,5 9,0 9,7 kva Temp. Rise / Ambient temp. [ C] Continuous duty Airtowater exchanger 95 / / / Efficiency 95 / 50 pf = 0,8 4/4 [%] 81,4 82,5 83,9 8,0 8,7 8,7 87,3 88,4 89, 89,2 89,5 90,4 91,3 92,3 92,5 92,7 92,8 92, 93,2 93,7 94,2 94,0 94,5 94,9 95, 9,4 9,4 9,5 9,1 9,3 9,3 9,5 9,4 9, 9,7 9,4 9, 92,9 93,3 93,9 94,3 94,5 94,8 9,0 9,2 9,3 9,3 9,8 9,3 9,7 Inertia B3 Approx. [kgm 2 ] 0,109 0,4 0,135 0,10 0,170 0,275 0,301 0,31 0,42 0,32 0,98 0,802 0,924 1,13 1,30 1,47 1,77 3, 4,25 4,80 5,8 7,97 9,29 11,9 13, 1,3 17,0 19,3 22,5 29,0 34,0 38,0 4,7 52,5 1, ,8 14,1 1,8 17,9 19,4 20,9 24,2 49,9 55,0 1,4 4,7 73, 88, Weight Approx. [kg]

9 MARINE APPLICATION / LOW VOLTAGE 50/0Hz Type Leads kva Temp. Rise / Ambient temp. [ C] Continuous duty 95 / / 50 Airtowater exchanger 95 / 50 Efficiency 95 / 50 pf = 0,8 4/4 [%] kva Temp. Rise / Ambient temp. [ C] Continuous duty Airtowater exchanger 95 / / / 50 Efficiency 95 / 50 pf = 0,8 4/4 [%] Inertia B3 Approx. [kgm 2 ] Weight Approx. [kg] 8 pole 50Hz 750 min 1 0Hz min 1 MJBM SA8 SB8 SC8 MA8 MB8 LA8 LB , 92,1 92,4 92, 93,1 93,3 93, ,9 92,4 92,7 92,9 93,4 93, 93,9 13,5 1,2 19,1 20, 22,4 24,1 25, SA8 500 SC8 500 MB8 500 LA , 95,2 95, ,1 74,2 82, MA8 50 LA , , SC8 30 MA8 30 LA8* , ,2 9,4 9, SA8* 710 SC8* 710 MA8* 710 MB8* ,3 9,5 9, 9, ,5 9,7 9,8 9,9 10 pole MJBM 500 SA SC MB LA10 50Hz 00 min 1 0Hz 720 min ,0 94,3 94, ,5 94,7 95,2 3,8 81, 89,7 10, SC10 30 MA10 30 MB10 30 LA , , SC MA10* 710 MB10* 710 LB10* ,4 9, ,3 9,3 9,7 9,7 pole MJBM 30 SC 30 MA 30 MB 30 LA 710 SC* 710 MA* 710 LB* 50Hz 500 min 1 0Hz 00 min *: 90 V recommended Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0, , ,0 9,2 9,4 9,

10 INDUSTRIAL APPLICATION / MEDIUM AND HIGH VOLTAGE 50Hz Type Leads kva Temperature rise / Ambient temp. [ C ] Continuous duty V.000 V V 105 / / / / / / 40 4 pole 50Hz min 1 MA4 LA4 LB MB4 LA4 LB4 500 MA4 500 MB4 500 LA MA4 50 LA SA4 30 MA4 30 MB4 30 LA4 30 LB SC4 710 MB4 710 LB pole LA LB MB LA LB 500 MA 500 MB 500 LA 50 MA 50 LA 30 SA 30 MA 30 MB 30 LA 30 LB 710 SA 710 MA 710 LA 710 LB 50Hz min Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0,8. High voltage generators ( V) will have initial MJJ

11 INDUSTRIAL APPLICATION / MEDIUM AND HIGH VOLTAGE 50Hz Type Leads kva Temperature rise / Ambient temp. [ C ] Continuous duty V.000 V V 105 / / / / / / 40 8 pole 50Hz 750 min 1 LA8 LB SA8 500 MA8 500 MB8 500 LA8 50 MA8 50 LA SA8 30 MA8 30 MB8 30 LA8 30 LB SA8 710 MA8 710 LA8 710 LB pole 50Hz 00 min SA MA MB LA10 30 SA10 30 MA10 30 MB10 30 LA10 30 LB SA MA LA LB pole 30 SA 30 MA 30 MB 30 LA 30 LB 710 SA 710 MA 710 LA 710 LB 50Hz 500 min Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0,8. High voltage generators ( V) will have initial MJJ

12 INDUSTRIAL APPLICATION / MEDIUM AND HIGH VOLTAGE 0Hz Type Leads kva Temperature rise / Ambient temp. [ C ] Continuous duty 4.10 V.000 V 13. V 105 / / / / / / 40 4 pole 0Hz 1. min 1 MA4 LA4 LB MB4 LA4 LB MA4 500 MB4 500 LA4 50 MA4 50 LA SA4 30 MA4 30 MB4 30 LA4 30 LB SC4 710 MB4 710 LB pole 0Hz min 1 LA LB MB LA LB MA 500 MB 500 LA MA 50 LA 30 SA 30 MA 30 MB 30 LA 30 LB SA 710 MA 710 LA 710 LB Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0,8. High voltage generators (13. V) will have initial MJJ

13 INDUSTRIAL APPLICATION / MEDIUM AND HIGH VOLTAGE 0Hz Type Leads kva Temperature rise / Ambient temp. [ C ] Continuous duty 4.10 V.000 V 13. V 105 / / / / / / 40 8 pole 0Hz min 1 LA8 LB8 500 SA8 500 MA8 500 MB8 500 LA MA8 50 LA SA8 30 MA8 30 MB8 30LA8 30 LB SA8 710 MA8 710 LA8 710 LB pole 0Hz 720 min SA MA MB LA SA10 30 MA10 30 MB10 30 LA10 30 LB SA MA LA LB pole 0Hz 500 min 1 30 SA 30 MA 30 MB 30 LA 30 LB SA 710 MA 710 LA 710 LB Ratings refer to the following conditions: balanced nondeforming load, altitude below m asl, minimun power factor 0,8. High voltage generators (13. V) will have initial MJJ

14 L 135 (1) AF D 1 D max L (1) ø215 (1) ø215 (1) AB AF H HS H HS AB STANDARD TYPE OF CONSTRUCTION Series MJB MJBM MJR Construction B3 B34 B35 B20/B14 B2* B1* * Single bearing configuration. Special configuration and shaft extensions are available. COUPLING Adaptor 1/2 7 1/ / Available Coupling MJB 10 MJB 200 MJB 225 MJB 250 MJB 315 MJB 355 MJB MJB MJB / / / Most common MJB (1) Dimensions for optional PMG MarelliGenerators

15 OVERALL DIMENSIONS [mm] Dimension H HS AB AF L D (MAX) L1 D1 SA MJB 10 COMPACT SB SC MA MB SA SB MJB 10 SC MA MB MJB 200 SA SB MA MB Dimension H HS AB AF L D (MAX) L1 D1 MJB 225 SA SB MA LA MJB 250 MA MB LA LB MJB 315 SA SB MA MB Dimension H HS AB AF L D (MAX) L1 D1 MJB 355 SA SB MA MB MJB SA SB MA MB LA LB MB MJB LA LB Dimension H HS AB AF L D (MAX) L1 D1 MJB 500 SA SC MA MB LA MJB 50 MA LA D (max) dimensions shown refers to biggest adaptor/coupling SA MJB 30 SB MA MB Dimensions available LA SA MJB 710 SC MA MB Dimensions available LA

16 MarelliMotori S.p.A. HEADQUARTERS Marelli Motori S.p.A. Via Sabbionara, Arzignano (VI) Italy (T) (F) web: sales@marellimotori.com ITALIAN OFFICES Milan Via Cesare Cantù, Cinisello Balsamo (MI) Italy (T) (F) milan@marellimotori.com Florence Via Panciatichi, 37/2 507 Firenze Italy (T) (F) florence@marellimotori.com MARELLIMOTORI OVERSEAS OFFICES: GREAT BRITAIN Marelli UK Ltd Meadow Lane Loughborough Leicester LE 11 1NB UK (P) (F) uk@marellimotori.com CENTRAL EUROPE Marelli Central Europe GmbH Heilswannenweg Elze Germany (P) (F) germany@marellimotori.com USA FKI MarelliUSA 1524 Lebanon Road Danville, KY USA (P) (F) usa@marellimotori.com ASIA PACIFIC Marelli Asia Pacific Sdn Bhd Lot 7, Jalan Majistret U1/2 Hicom Glenmarie Industrial Park Shah Alam Selangor D.E., Malaysia (P) (F) asiapacific@marellimotori.com SOUTH AFRICA Marelli Electrical Machines South Africa (Pty) Ltd Unit 4 55 Activia RdActivia Park Elandsfontein, 140 Gauteng Republic of South Africa (P) (F) southafrica@marellimotori.com Grafiche Marcolin Schio 2098 ASI.CT GB MARELLI MOTORI reserves the right to change the design, technical specification and dimensions in order to update or improve its products, without prior notice.