synchronous generator

1 AMG 0710, 0900, 11202.11.1998 ABB Industry Oy

Synchronous Generator AMGEnd Shield BearingConstruction


AMG 0710MM06

ABB Industry Synchronous Machine

G = generator

Z = motor

Standard shaft height in millimeters

Designation letter for frame length

Designation letter for core length

Number of poles

Type Designation Code


Main Components

Exciter

D-end Bearing

Diode Bridge

End Shield

Rotor Poles

Transformers Line Terminals

Shaft

Stator Core

Fan

Stator Windings

Neutral Point

Detachable Feet

Air Filters

Rotor Windings


Stator Core and Frame

Frame and end shields are made offabricated steel

Stator frame end parts and the middlepart with the core are welded together

Bearing housings are bolted to theend shields

Stator core is made of punched,stacked, high-grade, low-loss siliconsteel sheets

Sheet thickness is 0.5 mm (insulated onboth sides)


Rotor Rotor is designed to withstand the vibration caused by the prime mover

and stresses appearing up to 120 % of rated speed Critical rotational speed is at least 1.5 times the nominal speed Shaft is made of forged steel Poles are constructed of punched and stacked steel plates Salient poles are bolted to the rotor

Poles are provided withdamper winding

Cooling and supportingof windings byaluminum profiles

Diode bridge is mountedon the exciter rotor hubthat is shrink fitted on tothe shaft


Windings and Insulation MICADUR -Compact Industry (MCI) Insulation System based on Vacuum-

Pressure Impregnation (VPI) VPI-method has been used 20 years and it is well known for its high

reliability - no primary insulation failures on almost 15 000 machinesdelivered

Winding insulation exceeds Class F requirements (temperature limit 155C) Both stator and rotor windings withstand the influence of humidity,

moisture and chemically aggressive substances. Windings are made of form wound copper coils The complete winding and its supporting structures are vacuum pressure

impregnated with epoxy resin which ensures a very robust, solid andmoisture resistant insulation.

Support rings on the winding ends are impregnated together with thewinding

Excellent mechanical strength of the winding Rotor winding are made of insulated enameled rectangular copper as a

multi-layer winding


Terminals The stator line terminals and neutral terminals are situated in the top box

on the top of the generator Excitation transformers are installed in the terminal box The terminals for excitation and control equipment are in auxiliary

terminal box

Differential ProtectionTransformers

Main Terminals Voltage Transformer Neutral Point

Short Circuit CurrentTransformers

Current Transformerfor Parallel Operation


Direction of Rotation

The generator ends are designed D (drive-end) and N (non- drive-end)in accordance with IEC 34-7

The generator rotates counter-clockwise, when viewed from the D-endto N-end, the generator terminals U, V and W being connected to thenetwork phases L3, L2 and L1 respectively

The direction of rotation is indicated on the generator rating plate.

U V W

L1 L2 L3

CW

U V W

L1 L2 L3

CCW


Cooling The generator is cooled with a shaft mounted fan On standard arrangement the cooling air is drawn in through air

filters, and blown out to the environment


Mounting Frame number 0710 in the machine type designation indicates the shaft

height on IM 1001 mounting

IEC-Code II / I Figure ExplanationBearings

Frame Shaft extension

IM 1001IM B3

2 end shields with feet 1 cylindricalshaftextension

IM 1101IM B20

2 end shields with feet appr.level withshaft

1 cylindricalshaftextension

IM 1305 1 end shields with feet appr.level withshaft

flanged


Protection by Enclosure The standard degree of protection is IP 23 or IP 20

(protection against ingress of foreign bodies with diameter of 12 mmand above and harmful effects of spraying water)

In cases where a higher degree of protection is needed, thegenerator can be provided with an air-to-water heat exchangerwhich is mounted on the top of the generator (the degree ofprotection is IP 44, protection against ingress of foreign bodieswith diameter of 1 mm and above and harmful effects of splashingwater)


Balancing and Vibration Dynamic balancing on two planes Balancing is carried out with a half key Balancing grade G6.3 Vibration level of a fully assembled

generator mounted on rigid foundationis below 2.8 mm/s (RMS) with nominalspeed and excitation

Max.allowed vibration level is 20 mm/s(RMS) according to ISO 8528-9(DIN 6280 Teil 11)

Reference measurement is alwaystaken in three directions on thebearings (vertical, transversal andlongitudinal)


Bearings and Lubrication

The generator is provided with split-type sleeve bearings as standard Non-drive end bearing is insulated Bearings are spherically seated to facilitate assembling and maintenance The D-end bearing is designed to carry the loads produced by a coupling

misalignment and the rotor weight


Protection Against Corrosion

Screws washers and all surfaces made of steel sheet, aluminum alloy orcast iron are treated with a method appropriate to each material

Reliable anti-corrosion protection under the most severe environmentalconditions

The standard painting is a two-pack epoxy paint which is moisture andtropic-proof in accordance with DIN 50016

Suitable for outdoor installations, including chemical plants Bearings are treated with an anti corrosion oil film Shaft extension is protected with anti corrosion material that must be

taken away before mounting the coupling


Standards Rating and performance IEC 34-1 Determination of efficiency IEC 34-2 IP enclosures IEC 34-5 IC methods of cooling IEC 34-6 IM mounting arrangements IEC 34-7 Terminal marks and direction of rotation IEC 34-8 Noise limits IEC 34-9 Vibration severity IEC 34-1 Classification of insulating materials IEC 85 Quality ISO 9001 Environment ISO 14001

Lloyd's Register of Shipping (LRS) Det Norske Veritas (DVN) Bureau Veritas (BV) Germanischer Lloyd (GL) American Bureau of Shipping (ABS)

On request

synchronous generator

Documents