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Table of Contents
Summary of Contents for Electro Adda G Series
- Page 1 ASYNCHRONOUS THREE-PHASE GENERATORS G LINE OPERATING INSTRUCTIONS MM-12-rev 01-EN...
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Page 2: Table Of Contents
GENERAL SAFETY WARNINGS........................... 3 DESCRIPTION OF THE GENERATORS ....................... 4 GENERAL INFORMATION ..........................4 G-C L ................................4 G-W L ................................4 G-QN G-A L ............................5 GENERAL FEATURES............................7 REFERENCE STANDARDS ..........................7 MANUFACTURING DETAILS..........................8 Frame and stator............................8 Stator winding and insulation.........................9 Rotor ................................9 Non-drive end shield ............................9 Drive end shield/Flange ..........................9 The drive end shield or flange is made in cast iron or steel and is fixed to the frame using high tensile... -
Page 3: General Safety Warnings
GENERAL SAFETY WARNINGS Installation, operating and maintenance of electric generators can be potentially dangerous. All precautions and measures must therefore be taken to prevent the occurrence of such dangerous situations. NOTICE Electric generators are components with dangerous parts as they are live or have parts which move while in operation. -
Page 4: Description Of The Generators
DESCRIPTION OF THE GENERATORS GENERAL INFORMATION The G Line asynchronous three-phase generators frame size 280÷560 described in this operating and maintenance manual are designed in order to consider the different requirements in the field of low voltage generation, in the range of outputs included within 150 and 2000 kW. The series of basic machines is made up of different executions both as protection degree and cooling type as described hereunder: G-C Line... -
Page 5: G-Qn And G-A Line
The water cooling is a very efficient system to remove the heat produced by the generator. This system allows to significantly reduce the dimensions and the weight of the generator. The water cooling also allows to: Reduce the heat transmitted to the room ... - Page 6 All G Line generators are designed, manufactured, assembled and tested at our works in BEVERATE di BRIVIO - Lecco - ITALY. MM-13- rev 01-EN...
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Page 7: General Features
GENERAL FEATURES REFERENCE STANDARDS The G Line generators are in compliance with the following Standards: RATINGS AND PERFORMANCES IEC 60034-1 CEI EN 60034 – 1 METHODS FOR DETERMINING LOSSES AND EFFICIENCY IEC 60034 - 2 CEI EN 60034–2 ... -
Page 8: Manufacturing Details
MANUFACTURING DETAILS The G Line generators described in this manual have been designed and are manufactured in order to assure the maximum operating reliability and safety. G-C Line generators - Materials Frame size Aluminium Steel Frame Cast iron Steel DE shield Cast iron Steel NDE shield... -
Page 9: Stator Winding And Insulation
Stator winding and insulation Materials used to make the windings and the insulation system are in class H. Stator winding is three-phase AC with coils manufactured with enamelled copper wire and positioned in bulk in the stator slots. The copper wire used for stator winding is insulated using enamel made with modified polyesterimide resins plus amide-imide resins, with 200°C heat class. -
Page 10: Line Terminal Box
Line terminal box The terminal block for generators frame size 250÷355 is normally provided with 6x terminals; the terminal block for generators frame size 400÷560 is provided with 3 terminals only (one each phase), to which the supply cables are connected. In such case the connection of the windings is made inside the machine itself and it is not accessible. - Page 11 Terminal block with 3 terminals Terminal block with 6 terminals provided with no. 3 copper plates MM-13- rev 01-EN...
- Page 12 Auxiliary terminal box Generators are prepared for fitting auxiliary terminal boxes with IP55 or IP56 protection degree. Inside the terminal boxes are placed the electrical connections of any possible accessories such as thermal protectors, thermal detectors, heaters, encoder, etc. The auxiliary terminal boxes are of 3 types depending on the size of the generator and the number of electric connections required by the Customer and can be in aluminium (up to frame size 355) or in steel (generators frame size 400÷560).
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Page 13: Documentation
A plate containing rating data as well as electro mechanical data is fixed to the generator frame. This plate must never be removed from the generator. This plate also contains the serial number assigned by Electro Adda SpA. This serial number enables the complete generator tracking. -
Page 14: Receipt
The temperature of the rooms where generators are stored, should be included within 10°C and 50°C. In case generators should be stored in heavier conditions, it is necessary to consult Electro Adda SpA Technical Department when placing the order. The storage place should possibly have a low humidity level (Relative humidity below 75%). -
Page 15: Installation And Commissioning
INSTALLATION AND COMMISSIONING The generator must be installed in a well ventilated place. Avoid the proximity of walls or other machinery as they might obstruct normal ventilation. The machine foundation must be flat, stiff, strong and suitable to withstand the weight of the machine and the other electrodynamic forces mentioned in the overall dimensions drawing. -
Page 16: Alignment
Tolerances GA : +0.4 - +0.6 mm Do not use hammers or mallets to fit the transmission component. Before heating the coupling half any non-metal parts must be disassembled as they might be damaged by the heat. The coupling half must also only be removed after it has been heated using a flame or an electric induction appliance. - Page 17 a = X/2 5 b = ± 0.05 c = ± 0.05 Whenever the alignment errors exceed the tolerated values, the appropriate corrections must be performed by means of shims inserted under the machine flange and, if necessary, with small lateral movements.
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Page 18: Vertical Deviation
Vertical deviation By heating the generator, the distance between the foot of the generator and the center of the shaft (frame size) increases. This increase is mentioned in the following table: Frame size Increase in mm 160÷200 225÷250 0.13 0.15 0.16 0.18 0.23... - Page 19 Hydraulic connections (G-W Line generators) Water cooled machines are normally equipped with threaded connections for the water inlet and outlet or, on request, with flanges. The following table shows the cooling water flow rate values and the dimensions of the pipes normally used.
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Page 20: Electric Connections
Assembling of the vibration transducers (SPM) ( if provided) Vibration transducers are normally supplied disassembled in order to avoid having them damaged during transport. To install transducers it is necessary to refer to the instructions supplied by the transducer manufacturer. Electric connections CAUTION It is important to verify that the supply voltage and the frequency correspond to the values... - Page 21 Cable glands are normally suitable for cables with 10 – 16 mm diameter. Earth connection The generator and all the installed instruments must be connected to earth according to the provisions of the rules in force. The generator is provided with two earth terminals; one is positioned inside the terminal box and one is positioned on the frame.
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Page 22: Operation
In this case, to avoid injuries to people or material damage, immediately stop the generator, perform the necessary checks and carry out maintenance. If necessary, contact ELECTRO ADDA SpA In order to operate correctly, the electric generator must be submitted to proper care and maintenance. -
Page 23: Vibration Check
Operating temperatures G Line generators are designed to run under the operating conditions provided by the main European and international rules. Operating conditions, such as maximum ambient temperature and maximum operating altitude, are specified in the data sheet related to each generator. In case of ambient and operating conditions as the ones mentioned in the data sheet, machine temperatures are fully included within the limits set forth by the reference standards. -
Page 24: Maintenance
Maximum generator reliability and minimum maintenance costs are the result of a planned maintenance and inspection programme scrupulously followed during the whole machine life. In case the generator needs to be repaired, please contact ELECTRO ADDA SpA. CAUTION BEFORE STARTING ANY MAINTENANCE OPERATION ALL ELECTRIC CONNECTIONS... -
Page 25: General Cleaning
GENERAL CLEANING Cleaning the windings When cleaning assembled machines, it is advisable to firstly remove by an efficient suction all dirt that has accumulated. Remove all grease with dry, soft cloths that do not leave threads, or using a brush with very flexible bristles. -
Page 26: Maintenance Of The Bearings
Lubricant properties are available at the main manufacturers’. The grease normally used for lubricating bearings is type BIOLUBE G2” Ask ELECTRO ADDA SpA in case you change the lubricant brand or in case of doubt about its compatibility. WARNING : Many types of lubricant may cause skin irritation or eye inflammation. -
Page 27: Changing The Grease
If an automatic re-lubrication system is used, the quantities of grease mentioned on the plate should be doubled. The maximum permitted temperature for the bearings is 120°C The maximum operating temperature for grease and for bearings must not be exceeded. The following directions are of general nature. -
Page 28: Spare Parts
The parts adjacent to the bearing must also be cleaned well, e.g. shield machined surfaces, covers, grease boxes, etc., verifying that there are no burrs or damage to the seats. If an emery cloth or a grinding wheel must be used to eliminate scratches or other problems, pay attention that metal dust does not deposit in or around the bearings. -
Page 29: Measurement Of Insulation Resistance
MEASUREMENT OF INSULATION RESISTANCE The insulation resistance test is carried out to check if the resistance of the insulations and impregnation varnishes used is sufficient to allow a good operation of the generator. CAUTION BEFORE MEASURING THE INSULATION RESISTANCE, THE MACHINE MUST BE AT A STANDSTILL FOR A SUFFICIENTLY LONG PERIOD OF TIME TO ALLOW TOTAL DISCHARGE OF RESIDUAL VOLTAGE. - Page 30 1000 0.01 Windings temperature °C Even if the insulation system used for the machine windings allows their correct live operation also with insulation resistance values equal to 1/10 of those prescribed previously, it is advisable not to allow the insulation resistance to fall below the recommended values. The variation through the time of the insulation resistance during application of the test voltage supplies an additional indication of the insulation conditions.
- Page 31 ELECTRO ADDA SpA VIA NAZIONALE 8 - 23883 BEVERATE di BRIVIO LC – ITALY TELEFONO +39 039 53.20.621 TELEFAX +39 039 53.21.335 www.electroadda.com- info@electroadda.com MM-13- rev 01-EN...
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