|Poles (kVA 60 Hz) |
|4 ||187,5 |
|Certificates and testing |
|Applicable standards ||Generators are designed in compliance with:|
IEC 60034 - 60038 - 60072 - 1
BS 4999 - 5000
NF 51 - 100
NF 51 - 111
OVE M - 10
NEMA MG 1.32
Generators conform to EU rules.
UL certifications available on request.
|Certificate ||Test Certificate supplied with the machine. |
Material certificates in accordance with EN 10204 : 2001 can be supplied.
|Main components |
|Housing ||Rigid 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.
|Shield NDE ||Aluminium alloy 46100S T6 |
|Shaft ||Steel according to EN 10025 |
|Terminal board ||Made of Bakelite PF2736 7-pins (from 160 to 180 frame size) 9-pins (from 180 to 225 frame size) |
|Fan ||PA 6.6 up to MXB 180 SC4 included - Aluminum alloy above |
|Enclosure ||ODP - Open Drip Proof |
|Cooling System ||IC 01 as per IEC 60034-6 |
|Degree of protection ||IP 23 as per IEC60034-5 (up to IP 44) |
|Mounting ||Horizontal single bearing - IM 2105|
(double bearing available on request)
|Technical data |
|Stator/Rotor core ||Laminated and enamel-insulated on both sides to minimise eddy-current losses |
|Rotor ||Salient pole type.|
Made by copper 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
|Bearing ||General data|
Single or double antifriction bearing grease lubricated (ball type)
Bearing lifetime >=20'000 hours
|Impregnation system ||Stator and rotor are Roll deep impregnated |
|Insulation system ||Stator: H class insulated with a synthetic enamel.|
Rotor: H class insulated with a synthetic enamel.
|Protective treatments ||Standard impregnation with epoxy resin through high quality process.|
CW1081 on request.
|Operating conditions |
|Overloads ||During 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 operations ||All generators are provided with an amply sized damper cage and are suitable for parallel operations with other generators, when equipped with the paralleling unit (available on 180 and 225 frame size). |
|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. |
|Three pahse short circuit current ||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 (MXB 180 MB, MXB 180 LB and MXB 225 MB with MEC 20 AVR). |
|Radio interference ||All generators are equipped with Class B Group 1 radio interference filters as defined by EN 55011. |
|THD (Total Harmonic Distortion) / THF ||The no-load voltage wave form is sinusoidal with THD content less than 2% / THF < 2% |
|Vibrations ||Vibration level is in accordance with ISO 10816.
Measurement, evaluation and limits of vibration severity are in accordance with IEC 60034-14. |
|Auxiliary device |
|AVR model ||AVR model M00FA122A - MARK VX.|
Dedicated AVR for optional PMG.
|AVR position ||On right side viewed from D-end.|
225 frame size front mounted.
|AVR supply ||Mains as standard.|
225 frame size auxiliary winding.
|Voltage sensing ||Single phase |
|Accuracy ||± 0,5% (@rated load, balanced and not deforming, P.F. 0,8) |
|EMI filter ||Included |
|Limiters ||U/F Under Frequency |