5.5-630 kw 7.5-800 hp low voltage wound rotor motors

Wound Rotor Motor Standard Features:

Be specially designed for energy saving purpose which is totally enclosed and fan-cooled type.

Good performance, such as high safety, energy saving, compact design, low noise, little vibration, big breakaway torque, reliable operation, stable running and convenient maintenance.

Can be fit for common working environment and machinery without special requirement, such as pumps, fans, ventilators, mixer, crushers, food machines, transport machines, agriculture machines etc.

Equipped with re-greasing system when the motor frame size is 160MM and above

Can be equipped with PTC if requested.

Labeling Standards

Series Code + Frame Size + Iron Core Length No. + Motor Poles

Example: YR2 355 L – 4

YR2—means wound rotor motors

355—the second part means the height of motor center (when the motor has no foot, it is same to motor with foot)

L—the third part means the base iron core length no.(S-Short Base, M-Medium Base, L-Long Base)

4—the forth part means the motor poles, this is a 4 poles motor, synchronous speed is 1500 r/min (50Hz); 1800 r/min (60Hz)

Wound Rotor Motor Service Conditions:

Voltage Wave: ±5%

Frequency Wave: ±2%

Ambient Temperature: -15~40°C

Altitude: 1000 m.a.s.l

Humidity: ≦90%

Protection Class: IP44, IP54, IP55

Insulation Class: F, H

Temp. Rising: 80K (B class), 105K (F class)

Cooling Method: IC411 (Fan cooling)

Working Duty: S1 (Continuous)

Tolerance

Efficiency: -0.1 x (1-η)

Power Factor: - (1- cos ϕ)/6, -0.02(min.)

Rotation: ±20%

Locked Current: ±20%

Locked Torque: -15%, +20%

Max. Torque: -10%

Moment of Inertia (J): ±10%

Connection: Star-connection for up to 3kW; Delta-connection for 4kW and above