|Power||Up to 6.500 kVA|
|Voltages||Up to 690 V|
|Frame||160 ± 900|
|Poles||4, 6 and 8 |
(over contact MM)
|IP||IP 23. Available up to IP 44 with filters.|
|Enclosure||ODP - Open Drip Proof|
|Main Applications||Internal combustion engines, Steam & GAS Turbines|
Applicable standardsGenerators are designed in compliance with:
IEC EN 60034 - 1
BS 4999 - 5000
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.
CertificateTest Certificate supplied with the machine.
Material certificates in accordance with EN 10204 : 2001 can be supplied.
HousingRigid frame, rugged welded steel fabrication (EN 10025 - S235 JR).
Frame is provided with side ribs to increase the strength.
Marelli Generators for continuous duty operation are designed to meet vibration levels per IEC 60034-14, ISO 10816-1 and BS 5000-3.
ShieldMade of spheroidal graphite cast-iron (EN 1563) or grey cast-iron (EN 1561) up to 630 frame size.
Made of structural steel (EN 10025 – S235 JR) above.
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.
Double bearing generator: cylindrical shaft with key.
|Main terminal box||
Main terminal boxMounted on top up to 630 frame size.
Mounted on side from 710 frame size.
Made of formable steels EN 10130.
FanMade of aluminum alloy (EN 1706) or structural steel (EN 10025–S235 JR)
depending on application requirements.
EnclosureODP - Open Drip Proof
Cooling SystemIC 01 as per IEC60034-6
|Degree of protection||
Degree of protectionIP 23 as per IEC60034-5
MountingHorizontal - IM 1001 or IM 1101 as per IEC 60034-7.
Other mounting available on request.
Stator/Rotor coreLaminated and enamel-insulated on both sides to minimise eddy-current losses
RotorSalient 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 with a half key applied to the shaft extension in accordance with IEC 60034-14 to vibration grade normal A.
Special vibration level construction are available.
Single or double antifriction bearing grease lubricated (ball or roller type) or oil lubricated sleeve bearing.
The theoretical lifetime of bearings, L10h according to ISO 281/1 standard, of standard horizontal construction generators, without external forces (radial and / or axial) is in excess of 50.000 hours. On request, the lifetime of bearings, L10h can be in excess of 100.000 hours.
Locating bearings are on the D end side and floating bearings on the ND end side.
Antifriction bearings up to 800 frame size included.
Sleeve bearings from 900 frame size included (available for smaller frame sizes).
Up to 250 frame size:
ND end bearing can be insulated to prevent any harmful circulating current from passing through the bearing surfaces.
Insulated antifriction bearings in standard configuration:
Impregnation systemStator and rotor are VPI treated with an unsaturated polyester amide resin which is polymerised in an oven.
Insulation systemStator: H class insulated with a synthetic enamel (class F standard for generators at 400V form wound from 400 to 1250 frame size and for low voltage generators from 800 to 1250 frame size).
Rotor: H class insulated with a synthetic enamel.
Protective treatmentsEpoxivinilic 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.
OverloadsDuring continuous duty (S1), the following overloads are allowed:
10% for 1 hour
15% for 10 minutes
30% for 4 minutes
50% for 2 minutes
These overloads must be occasional and followed by one hour of running at normal load or less.
Parallel operationsAll generators are provided with a amply sized damper cage and are suitable for parallel operations with other generators, when equipped with the paralleling unit. A power factor regulator (to work in parallel with the main) is available on request.
Transient ratingsAll generators can be designed to meet specific reactance values (x'd and x''d). Values can be confirmed by contacting Marelli Motori.
|Three pahse short circuit current||
Three pahse short circuit currentAll generators equipped with overboosting device ensure a three phase short circuit current (Icc) higher than 3 times the rated current (In): Icc > 300% In
Radio interferenceAll generators are equipped with Class B Group 1 radio interference filters as defined by EN 55011.
|THD (Total Harmonic Distortion)||
THD (Total Harmonic Distortion)The no-load voltage wave form is sinusoidal with THD content less than 2%.
VibrationsVibration level is in accordance with ISO 10816.
Measurement, evaluation and limits of vibration severity are in accordance with IEC 60034-14.
AVRAutomatic voltage regulator mounted on board.
Digital AVR available for all sizes on request.
Overboosting deviceLow Voltage
Space heatersHeaters installed at ND end side.
RTD-PT100RTD devices in standard configuration:
Other configurations available:
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