POWER GENERATION

Technical Specifications

Model :
MXB-E
MJB
MJH
MJR
MJHR
MJV
MJHV
Rated Output (kVA) :
Up to 375
Up to 6,500
Up to 14,000
Up to 6,000
Up to 12,500
Up to 4,550
Up to 8,750
Rated Voltage (V) :
Up to 480
Up to 690
Up to 15,000
Up to 690
Up to 15,000
Up to 690
Up to 15,000
Poles :
4
4, 6, 8, 10 and 12
4, 6, 8, 10 and 12
4, 6, 8, 10 and 12
4, 6, 8, 10 and 12
4, 6, 8, 10 and 12
4, 6, 8, 10 and 12
Cooling :
IC 01 as per IEC60034-6
IC 01
IC 01
IC 81W/IC 86W
IC 81W
IC 611
IC 611
IP :
IP23 as per IEC60034-6 (up to IP44 from 180 to 250 frame size
IP23, available up to IP44 with filter.
IP23, available up to IP44 with filter.
IP44, available up to IP56.
IP44, available up to IP56.
IP44, available up to IP56.
IP55, available up to IP56.
Mounting :
Horizontal - IM 1001 or IM 1101 as per IEC 60034-7. Except for Model MXB-E: Horizontal single bearing (160 frame size) Horizontal single bearing - IM2106 from 180 to 250 frame size (double bearing available on request.
Stator/Rotor Core :
Laminated and enamel-insulated on both sides to minimise eddy-current losses.
Rotor :
Salient pole type. Made by copper flat wire. H class insulated with enamel coating. Winding retaining by pass-through bars of high quality steel. Rotating rectifier: Graetz diode bridge with 6 diodes. Rotors are dynamically balanced. All models except MXB-E construct with a half key applied to the shaft extension in accordance with IEC 60034-14 to vibration grade normal A. Special vibration level construction is available.
Impregnation System :
Epoxy resin through high quality process for Model MXB-E / All others; Stator and rotor are VPI treated with an unsaturated polyester amide resin which is polymerized in an oven.
Protective Treatments :
Epoxivinilic and polyacrylic. Total minimum thickness 120 micromillimeters. Epoxivinilic: Epoxy two component products, with vinyl change. Polyacrylic: Two components polyurethane product formulated with unmodified hydroxyl acrylic resin. Except standard impregnation for model MXB-E with epoxy resin through high quality process. CW1081 upon request.
Transient Ratings :
All generators can be designed to meet specific reactance values (x'd and x''d). Values can be confirmed by contacting Marelli Motori.
Radio Interference :
All generators are equipped with Class B Group 1 radio interference filters as defined by EN 55011.
THD (Total Harmonic Distortion) :
Model MXB-E; Typically THD < 2% at no load / THF < 2%. All others models; The no-load voltage wave form is sinusoidal with THD content less than 2%.
Vibrations :
Vibration level is in accordance with ISO 10816. Measurement, evaluation and limits of vibration severity are in accordance with IEC 60034-14.
*Enclosure :
ODP
ODP
ODP
TEWAC
TEWAC
TEAAC
TEAAC

TEAAC – = Totally Enclosed Air to Air Cooled.

TEWAC =  Totally Enclosed Water to Air Cooled.

ODP = Open Drip Proof

Test Certificate supplied with the machine.
Material certificates in accordance with EN 10204 : 2001 can
be supplied.

Generators are designed in compliance with:

MXB-E

MJB / MJH / MJR / MJHR / MJV / MJHV
  • IEC 60034 – 1
  • BS 4999 – 5000
  • NEMA MG 1.32
  • Generators conform to EU rules
  • UL 1004 – 1 (Certification pending)
  • UL 1004 – 4 (Certification pending)
  • C22.2 No. 100 (Certification pending)
  • IEC EN 60034 – 1
  • BS 4999 – 5000
  • VDE 0530
  • NF 51 – 100
  • NF 51 – 111
  • OVE M – 10
  • NEMA MG 1.32
  • Generators conform to EU rules.
  • UL/CSA certifications available on request.
  • Aderence to ISO 8528 group G preformance classes.

MXB-E 1-1

MJB / MJH / MJR / MJHR / MJV / MJHV

Carbon steel – hot rolled

General data Made in carbon steel and obtained by lamination (EN 10083 – 2 C40 – TN). Shaft is obtained by forging from 290 mm diameter and above. The shaft is tested at the manufacturer in order to check it is defect-free. Shaft design Double bearing generator: cylindrical shaft with key.

MXB-E

MJB

MJH

MJR / MJHR / MJV / MJHV

Terminal board installed on top of terminal box.

Made of Bakelite 7-pins (from 160 to 180 frame size); 9-pins
(from 225 to 250 frame size)

Mounted on top up to 630 frame size.

Mounted on side from 710 frame size.

Made of formable steels EN 10130.

Mounted on top.

Made of formable steels EN 10130.

Mounted on side (right or left will be selected).

Made of formable steels EN 10130.

MXB-E

MJB

MJH

MJR

MJHR

MJV

MJHV

Class H for stator and rotorStator: H class insulated with a synthetic enamel (class F
standard for generators with H>=800 or form wound form
H=400. Class H option with BH technology).
Rotor: H class insulated with a synthetic enamel.
Stator: F class insulated with a synthetic enamel (class H option
with BH technology).
Rotor: H class insulated with a synthetic enamel.
Stator: H class insulated with a synthetic enamel (class F
standard for generators with H>=800 or form wound form
H=400. Class H option with BH technology).
Rotor: H class insulated with a synthetic enamel.
Stator: F class insulated with a synthetic enamel (class F
standard for low voltage generators from 800 to 1250 frame
size), (class H option for low, medium and high voltage
generator with BH technology).
Rotor: H class insulated with a synthetic enamel.
Stator: H class insulated with a synthetic enamel (class F
standard for generators with H>=800 or form wound form
H=400. Class H option with BH technology).
Rotor: H class insulated with a synthetic enamel.
Stator: F class insulated with a synthetic enamel (class H option with BH technology). Rotor: H class insulated with a synthetic enamel.

MXB-E

MJB / MJH / MJR / MJHR / MJV / MJHV
Generators with auxiliary windings or PMG ensure a three phase short-circuit current (Icc) higher than 3 times the rated current (in): Icc > 3 In for 10 seconds All generators equipped with overboosting device ensure a three phase short circuit current (Icc) higher than 3 times the rated current (In): Icc > 300% In
Model:MXB-E Model:MJB Model:MJH /  MJHV
Frame SizeAVR Type
 Frame Size
AVR Type
 Frame SizeAVR Type
        
 AVR model 11000013 – Mark VX
 160 – 250
Mark V analogue
 400 – 450MEC 20 analogue/digital
 Dedicated AVR for optional PMG. 315 – 450MEC 20 analogue / digital 500 – 560M40FA610A analogue
Position:On right side viewed from D-End 500 – 560M40FA610A analogue 630 – 710M63FA310A analogue
225 – 250:Front mounted 630 – 710M63FA310A analogue 800 – 1,250MEC 100 digital
   800 – 900MEC 100 digital   
        
Model:MJR Model:MJHR / MJV
  Model: shade MJV / MJHV shade
Frame SizeAVR Type Frame SizeAVR Type  Frame Size shadeAVR Type shade
        
250Mark V analogue 400 – 450
MEC 20 analogue / digital  250Mark V analogue
315 – 450MEC 20 analogue / digital 500 – 560
M40FA610A analogue
  315 – 450MEC 20 analogue / digital
500 – 560M40FA610A analogue 630 – 710
M63FA301A analogue
 500 – 560M40FA610A analogue
630 – 710M63FA310A analogue 800 – 1,250
MEC 100 digital
 630 – 710M63FA301A analogue
800 – 900MEC 100 digital