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Three Phase Generator

Three phase generators are producing three alternating currents at the same time. Our three phase generators are designed and engineered for different demands of our customers. As a professional Diesel Generator Sets manufacturer, we got high reputation in the market for our three phase generators′ excellent performance, reliability and longevity. We supply different types of three phase generators: Open Diesel generator set, Soundproof Diesel Generator Set, Container Diesel Generator Set and Trailer Diesel Generator Set to meet your different requirement.

Three Phase Generator:Introduction
This table is the summary of the power of self-contained generator used under the commonly used voltage in the world.
1. Three Phase Generator:Description of Power
Continuous Power S1/40℃—— Definition of IEC34-1
Continuous operation with load under insulation class: overload for 1 hour every 12 hours is allowable.
40℃ Spare Power
Yearly maximum 500 hours operation with continuous load but not overload and temperature rise over H class is allowable.
27℃ Spare Power
Power rises with the increased temperature under the same load as the one regarding 40℃ spare power and in the environment of temperature less than 27℃ is allowable.
For example: S1/40=100KW spare/40=105KW spare/27=110KW
2. Three Phase Generator:Insulation Class and Temperature Rise

3. Three Phase Generator:Power Correction
Corresponding correction coefficient in the following table multiplies rated power.

Environment Temperature

Environment Temperature
Altitude	25℃	40℃	45℃	50℃	55℃	60℃
0-1000 m	1.045	1	0.973	0.942	0.910	0.882
1000-1500 m	1.012	0.972	0.945	0.910	0.882	0.854
1500-2000 m	0.983	0.941	0.912	0.878	0.859	0.831
2000-2500 m	0.952	0.898	0.878	0.864	0.826	0.801
2500-3000 m	0.913	0.869	0.843	0.818	0.793	0.772
3000-3500 m	0.873	0.834	0.800	0.783	0.754	0.732
3500-4000 m	0.833	0.792	0.764	0.742	0.712	0.691
4000-4500 m	0.791	0.749	0.718	0.702	0.671	0.649
4500-5000 m	0.751	0.702	0.684	0.658	0.627	0.611

Power Factor
Lagging Power Factor	1	0.9	0.8	0.7	0.6
Correction Coefficient	1	1	1	0.92	0.85

4. Three Phase Generator:Winding
We strongly recommend you choose different winding structure and pitch according to the actual requirement. Concentric and lap winding and 2/3 pitch.

5.Three Phase Generator: Performance
5.1 Conform to International Accreditation and Standard
Generator used for 4-pole follows IEC34-1/34-2/34-5.
5.2 Electrical Performance
Excitation system/short-circuit capability:
Self-excitation system without short-circuit capability;
Excitation system of permanent magnet (PMG) with the capability to maintain 3 times of short-circuited rated current for 10 seconds.
Voltage Regulator:
Generator used for 4-pole creates suitable AVR for its excitation system and receives respect with its reliability and stability.
Different model of generator has different excitation system, which is listed on the Power Table.
Frequency:
Generator used for 4-pole can provide frequency of 50Hz and 60Hz (so do all generators of our company).
Power Factor:
Generator used for 4-pole is designed for power factor of 0.8 and 1. For the power factor lower than 0.8, contact us for more.
Waveform:
With the zero load or rated linear load and balance load, distortion factor of line vs. line waveform (THC or THD) is less than 4%.
Telephone harmonic factor TFH is less than 2% (according to IEC).
Telephone interference factor (TIF) is less than 50 according to NEMA requirement.
Transient Performance:
Transient voltage falling is less than 20% with rated load and 0.8 power factor.
Recovery time of 20% voltage falling is less than 1.0 second.
Parallel Use:
After equipped with suitable module, all generators used for 4-pole can be used connectedly.
Overload Capability:
Generator used for 4-pole is required of overload capability according to NEMA standard.
Single-phase Operation:

5.3 Mechanical Performance
Mode:
Generators used for 4-pole, single and double bearing(s) are available. Provide changeover connectors and driving disc used for main generator.
Protection:
Standard protection class is IP22. If user has special requirement, other protection class such as IP23, IP44 and IP55 also can be provided.
Bearing:
All series of generators of our company uses permanent sealed bearing. Lubrication allowable bearing can also be used, if required by user.
Balance:
Check all rotors for balance according to ISO940 and NFC51-11 standards. Perform balance check on double
bearing rotor with a half-key.
Rotating Direction:
All generators used for 4-pole can operate in two directions (Converse direction operation results in reduce of power)
Over speed:
Maximum over speed reaches 2250 rpm (1.25 times of 60Hz rated speed )
Insulation and Protection:
Generator used for 4-pole is of Class H insulation. Protection for standard winding can bear 95.7% relative humidity and be used in doors.
For the special environment or especially harsh environment, special devices or surface covering technical is required (Consult our company for details).
Connection Box and Connector:
Big connection box of generator used for 4-pole makes easy and safe AVR installation and wire connection. Current transformer and other optional modules can also be installed in this box.
Mechanical Structure:
With finite element analysis and calculation, mechanical performance of parts is optimized. Bed plate is made of armor plate and front and rear end cover is made of cast iron.
Aluminum alloy, cast iron, steel bed plate and flange are available according to the different customers’ requirements.

6. Three Phase Generator:Accessories and Spare Parts
Air inlet filter (power falls by 5%), Air outlet filter (power falls by 5%), Lubrication allowable bearing Room heater, Permanent magnetic generator

7. Three Phase Generator:Connection