Product Description

YR2 Low Voltage Three-Phase Slip Ring Motors is closed wound rotor three-phase asynchronous motor, is the new generation product with updates design in China. The power class and mounting size of this series motor is applied to the international standard IEC72. The motor can gain good start performance (When smaller start current, bigger start torque) and small range speed control through rotor loop external connection to resistance. It’s widely used when required bigger start torque than squirrel-cage rotor motor; or when electric fence capacity not enough to start squirrel-cage rotor motor, frequent start, start time longer or connected electrical shaft as synchronous transmission. For example, metal cutting machine, crusher , globe mill, compressor, sugar mill, windlass, drive belt and other required heavy-load start and short-time overload mechanical equipments. The motor has advantages as high efficiency, overload capacity, low noise, small vibration, reliable structure ,beautiful shape and so on, especially fit for separate or assorted exportation, or assorted with import equipment, has become our main export product .

Type: 3 Phase Slip Ring Induction Motor

Efficiency level: High efficiency energy-saving

Frame size: 132~450 frame

Rated output: 3~800 kW

Rated voltage: 380V, 400V, 415V, 440V, 460, 480V, 550V, 660V, 690V, 760V

Rated frequency (speed):

50Hz (3000/1500/1000/750/600/500 r/min)

60Hz (3600/1800/1200/900/720/600 r/min)

No. of poles: 2P, 4P, 6P, 8P, 10P, 12P

Mounting methods: Horizontal foot mounted IM1001 (B3)

Material of frame/housing: Cast iron

Service Factor: 1.00

Insulation Class: F (155℃)

Temp. Rising: ΔT=80°K

Bearing type: Roller/Ball bearing

Working Duty: S1 (Continuous)

Ambient Temperature: -20°C ~ 40°C

Altitude: ≦1000 m.a.s.l

Ambient humidity: ≦90%

Protection Class: IP44, IP54, IP55

Cooling: IC411 Totally-enclosed, fan-cooled

Lubricating: Grease lubricated bearings

Grounding lug: On the frame and terminal box

Temperature detector: PT100

Material of nameplate: Stainless steel

Metric Threaded Cable Entries on the Terminal Box

With slip rings

Rotor terminal box separated from stator terminal box

Compartment of slip rings and brushes separated from stator and rotor, behind the non-drive end bearing

Grounding brush on the drive end shaft for frames 450 and up

Customized frame size/power

Material of frame/housing: Fabricated in welded steel plate

Shaft: Special dimensions, double shaft end, tapered, hollow as per request

VFD application

Service Factor: 1.15 or above

Insulation class: H (180°C)

Ambient temperature: Above 40 °C (on request)

Altitude: ＞1000M (on request)

Mountings: B5, B35, V1

Space heaters

Thermostats RTD

Thermal protection PTC

Bearing: SKF, FAG brand

NDE or both DE and NDE bearings are electrically insulated

Grounding brush on drive end bearing for all frames when driven by frequency converter (except for classified area)

Special Windings, Voltage, Frequency

Cooling: IC416 Forced ventilation in the air internal and external circuit, air-to-air heat exchanger on the top of motor