Efficiency Air Cooling 3-Phase Asynchronous Motor Y

Y-355-2/4/6 High Efficiency Air Cooling 3 Phase Asynchronous Motor

Y-355-2/4/6 High Efficiency Air Cooling 3 Phase Asynchronous Motor

Frame Size	H355mm	No. of Poles	2P, 4P, 6P
Rated Power	220KW~400KW	Rated Voltage	6KV
Rated Frequency	50/60HZ	Insulation	155 (F) Grade
Protection Grade	IP23	Mounting Type	IM B3
Cooling Method	IC01	Duty	S1
Connection	Y	Vibration	≤2.3mm/s
Altitude	≤1000m	Ambient temperature	-15℃ ～ +40℃
Place of Origin	Xi’an, China	Brand name	SIMO MOTOR
Humidity	Average monthly peak relative humidity is 90%

*Note: Motors can be customized according to customer’s requirements.

Motor Description

Y series high voltage efficiency motor can be operated when the rated frequency is both 50HZ and 60HZ. As the utilization and size of motors are related to torque rather than power the theoretical power of single-speed motors increases linearly with supply frequency (and hence with speed), i.e. by 20 % from 50 Hz to 60 Hz.

I2R winding-losses are dominant especially in small and medium sized induction motors. They basically remain constant at 50 Hz and 60 Hz as long as the torque is kept constant. Although windage, friction and iron loss, increase with frequency, they play a minor role especially in motors with a number of poles of four and higher. Therefore, at 60 Hz, the losses increase less than the 20 % power increase when compared to 50 Hz and consequently, the efficiency is improved.

In practice, both 60 Hz and 50 Hz power designations of single-speed motors have to conform to standard power levels in accordance with IEC 60072-1 and local standards such as EN 50347. Therefore, an increased rating of motor power by 20 % is not always possible. However the general advantage of 60 Hz still applies when the motor design is optimized for the respective supply frequency rather than just re-rated. The difference in efficiency between 50 Hz and 60 Hz varies with the number of poles and the size of the motor. In general, the 60 Hz efficiency of three-phase, cage-induction motors in the power range from 0,75 kW up to 375 kW is between 2,5 percentage points to less than 0,5 percentage points greater when compared to the 50 Hz efficiency. Only large 2-pole motors may experience a reduced efficiency at 60 Hz due to their high share of iron, windage and friction losses.

Outline Dimensions

Motor Parameters

Type	Rated Power kW	Rated Current A	Rated Speed r/min	Eff. %	Power Factor Cosφ	Locked Torque	Locked Current	Max. Torque	Load moment of inertia Kg.m²	Weight Kg
Type	Rated Power kW	Rated Current A	Rated Speed r/min	Eff. %	Power Factor Cosφ	Rated Torque	Rated Current	Rated Torque	Load moment of inertia Kg.m²	Weight Kg
Y-3551-2	220	26.8	2975	92.0	0.86	0.6	7.0	1.8	16	1810
Y-3552-2	250	30.4	2975	92.1	0.86	0.6	7.0	1.8	18	1820
Y-3553-2	280	33.9	2975	92.3	0.86	0.6	7.0	1.8	20	1854
Y-3554-2	315	38.0	2975	92.7	0.86	0.6	7.0	1.8	22	1904
Y-3555-2	355	42.7	2975	93.0	0.86	0.6	7.0	1.8	24	1950
Y-3551-4	220	26.9	1485	92.5	0.85	0.8	6.5	1.8	77	1560
Y-3552-4	250	30.6	1485	92.6	0.85	0.8	6.5	1.8	87	1605
Y-3553-4	280	33.8	1485	92.7	0.86	0.8	6.5	1.8	96	1650
Y-3554-4	315	37.9	1485	92.9	0.86	0.8	6.5	1.8	107	1710
Y-3555-4	355	42.7	1485	93.1	0.86	0.8	6.5	1.8	89	1885
Y-3556-4	400	48.0	1485	93.3	0.86	0.8	6.5	1.8	99	1935
Y-3554-6	220	28.0	990	92.2	0.82	0.8	6.0	1.8	210	1670
Y-3555-6	250	31.7	990	92.5	0.82	0.8	6.0	1.8	235	1725
Y-3556-6	280	35.0	990	92.7	0.83	0.8	6.0	1.8	240	1905