CRRC 4.2MW Double Fed Induction Generator

CRRC 4.2MW doubly fed Induction generator is a high-power, high-efficiency generation solution, delivering a rated output power of 4200 kW, a rated voltage of 1140 V, and a rated rotating speed of 1720 rpm, paired with an H-class insulation system.
Equipped with a 97% rated efficiency and a rated current of 637 A, this generator is engineered to capture and convert wind energy with exceptional efficiency, while maintaining stable performance in the variable conditions of wind farms.
As a mature doubly fed design, it seamlessly integrates with industry-standard wind power converter technologies, ensuring reliable grid compatibility and long-term operational stability.
We provide full life-cycle support for the 4.2MW doubly fed Induction generator , including equipment supply, on-site installation and commissioning, maintenance training, spare parts provision, and ongoing technical troubleshooting services.

Advantages of CRRC 4.2MW Double Fed Induction Generator

The 4.2MW doubly fed Induction generator utilizes mature doubly fed Induction generator technology, achieving a rated efficiency of 97%, exceeding the industry average, while providing a rated power of 4200 kW to maximize wind energy utilization and project profitability.
Its 1140 V rated voltage is optimized for large-capacity wind farms, reducing transmission losses and enabling direct compatibility with high-voltage grid infrastructure, thus lowering the cost of supporting electrical equipment.
The H class insulation system withstands extreme temperature swings and harsh outdoor environments, while the 637 A rated current ensures stable load-bearing capacity, minimizing the risk of overheating or downtime.
As a mature doubly fed model, it leverages well-established converter technology with high part commonality, resulting in lower operation and maintenance costs and easier access to spare parts for simplified upkeep.
The 1720 rpm rated speed is matched to the 4.2 MW power output, ensuring consistent, high-performance energy conversion across varying wind speeds, making it ideal for large-scale wind farm deployments.

Technical Specifications

Motor Model:	FYKS21
Rated Power:	4200-4300 kW
Rated Frequency:	50 Hz
Ambient Temperature:	-30℃ ~ +45℃
Rated Current:	637 A
Insulation Class:	H
Rated Speed:	1720-1780 rpm
Rated Voltage:	1140 V
Manufacturer:	CRRC
Winding Connection:	△/Y
Duty Type:	S1
Number of Phases:	3
Mounting Arrangement:	IMB3
Cooling Method:	IC2X

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Product Name	Rated Power	Rated Speed	Rated Voltage	Rated Current	Rated Frequency	Rated Efficiency	Protection Class	Cooling Method	Weight
1.5MW Generator	1560 kW	1800 rpm	690 V / 420 V	1090 A / 390 A	50 Hz	≥97%	IP54/IP23	Air-to-Air + Water Jacket	7200 kg
2.5MW Generator	2560 kW	1720 rpm	690 V	1877 A	50 Hz	N/A	IP54	IC666	8100 kg
3.3MW Generator	3400 kW	1720 rpm	690 V	2493 A	50 Hz	N/A	IP54	IC616	10000 kg
4.2MW Generator	4200~4300 kW	1720~1780 rpm	1140 V	637 A	50 Hz	N/A	N/A	IC2X	N/A
6.4MW Generator	6400 kW	1720 rpm	1140 V	962 A	50 Hz	N/A	N/A	IC26	11500 kg
1.5MW AAC Generator	1560 kW	1800 rpm	690 V / 420 V	1090 A / 390 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	7200 kg
2MW AAC Generator	2150 kW	1200 rpm	690 V / 401 V	1506 A / 624 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	9500 kg
2.XMW AAC Generator	2280~2600 kW	1650~1820 rpm	690 V	N/A	50 Hz	≥96.5%	IP54/IP23 (Slip Ring Chamber)	IC616	7500 kg
4.XMW AAC Generator	3600~4200 kW	1200 r/min	690 V	N/A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	N/A
1.5MW Plateau AAC Generator	1567 kW	1735 rpm	690 V / 300 V	1138 A / 459 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Air Cooling	7600 kg
2MW Plateau AAC Generator	2150 kW	1800 rpm	690 V / 389 V	1506 A / 590 A	50 Hz	≥97%	IP54/IP23	Air-to-Air Cooling	7800 kg
2.5MW Plateau AAC Generator	2600 kW	1200 rpm	690 V / 415 V	1822 A / 665 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Air Cooling	11300 kg
2.5MW Low Temp AAC Generator	2600 kW	1200 rpm	690 V / 415 V	1820 A / 670 A	50 Hz	97%	IP54/IP23	IC666	11900 kg
2MW AWC Generator	2150 kW	1755 rpm	690 V / 312 V	1540 A / 614 A	50 Hz	≥97%	IP54/IP23	Air-to-Water Cooling	6500 kg
3.XMW AWC Generator	3100~3750 kW	700~1380 rpm	690 V	N/A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	IC86W	12500 kg
5MW AWC Generator	5300 kW	1200 rpm	6300 V	406 A	50 Hz	≥97%	IP54/IP23 (Slip Ring Chamber)	Air-to-Water Cooling	17600 kg
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CRRC 4.2MW Double Fed Induction Generator
Motor Model	FYKS21	Material No.	FYZ001
Number of Phases	3	Insulation Class	H
Winding Connection	Δ / Y	Mounting Form	IM B3
Rated Voltage	1140 V	Duty Type	S1
Rated Frequency	50 Hz	Ambient Temperature	-30~45 ℃
Speed Range	1000-1720-2050 rpm	Cooling Method	IC2X

Rated Power	Rated Speed	Rated Stator Voltage	Rated Rotor Voltage	Rated Rotor Current
4200kW	1720 rpm	1140 V	520 V	637 A
4300kW	1780 rpm	1140 V	671 V	630 A
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Squirrel cage wind turbine generator

Product Model

Rated Power

Rated Speed

Rated Frequency

Center Height

Number of Poles

Stator Rated Voltage

Stator Rated Current

Stator Winding Connection

Rated Efficiency

Power Factor

Insulation Class

Cooling Method

Motor Weight

Protection Class

2.5MW Generator

2650 kW

1550 rpm

51.4 Hz

630 mm

750 V

2307 A

Delta (△)

≥97%

≥0.88

Air-to-Air Cooled

8350 kg

IP54

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Permanent magnet wind generator

Product Model	Rated Power	Rated Voltage	Number of Phases	Protection Class	Rotational Speed	Rated Current	Weight
7.6MW Semi-direct PMSG	7600 kW	690 V	N/A	N/A	278 rpm	3347 A	48.5 t
3.6MW Semi-direct PMSG	3830 kW	690 V	3	IP54	350 rpm	N/A	17.5 t
3MW Integrated Semi-direct PMSG	3200 / 3400 / 3620 kW	710 V	3	IP54	480 / 526 / 550 rpm	N/A	12 t
1.5MW Direct-drive PMSG	1580 kW	720 V	6	IP23	16.6 – 20.5 rpm	720 A	44 t
2.0MW Direct-drive PMSG	2120 kW	720 V	2×3	IP54	14 rpm	2×1006 A	49 t
2.5MW Direct-drive PMSG	2650 kW	690 V	2×3	IP54	13.5 – 16 rpm	2×1394 A	53 t
3.0MW Direct-drive PMSG	3350 kW	690 V	2×3	IP54	12.2 – 13.9 rpm	2×1800 A	69 t
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General Infomation of CRRC Stator Coils for Wind Turbines Above 1.5MW
Product Model	7MW	Stator slots	192
Rated voltage	1400 V	Winding pitch	1-11
Turns per coil	6	Weight	4.05 kg
Scale	1:01
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Wind Power (Business Layout)

Wind Power (Market Situation)

As of December 2022, Yongji Electric has provided the wind power market with over 50,000 wind turbines (103GW), distributed across more than 1,800 wind farms both domestically and internationally. It comprehensively covers all wind power installation areas in China, accounting for 37% of the total number of wind turbines in operation, ranking first in the domestic market share.

Technical Requirements

When the voltage phase sequence of the three-phase power supply is the same as the order of the terminal letters U, V, W on the motor terminals, the motor shall rotate counterclockwise when viewed from the shaft extension end; the bearing grease shall be BEM41-141, the lubrication cycle of the front and rear bearings is 0.5g or a similar amount of lubricating oil to be added every 8 hours, and the specific operation shall refer to the centralized lubricator operation manual.