YZR Series Slip Ring Crane Duty Induction Motor

General brief

YZR series slip ring crane duty induction motor for crane and metallurgical uses, featured with large overload capacity and adequate mechanical strength, are especially suitable for driving various types of crane and metallurgical machineries or other similar equipment.

YZR series crane motors have the feature of large overload capacity, high mechanical strength, adjustable braking torque, compact structure, convenient to use and maintain.

Working duty                                                                                                

There are seven types of duty type for these series motors, S2, S3, S4, S5, S6, S7, S8 and S9. The basic duty type is S340% (duty type is S3, cyclic duration factor is 40%, each cyclic is 10min). The following duty types are most useful to these series motors.

1. Short-time duty type (S2)

Operation of constant load during a given time, less than that required to reach thermal equilibrium, followed by a rest and de-energized period of sufficient duration to re-establish machine temperature within 2 deg K of the coolant.

2. Intermittent periodic duty type (S3)

A sequence of identical duty cycles, each including a period of operation at constant load and a rest and de-energized period but the operation period are so short that it is not sufficient for the machine to reach thermal equilibrium In this duty type, the cycle is such that the starting current does not significantly affect the temperature rise.

3. Intermittent periodic duty type with starting (S4)

A sequence of identical duty cycles, each including a significant period of starting, a period of operation of constant load and a rest and de-energized period, but the operation period is so short that it is not sufficient for the machine to reach thermal equilibrium.

4. Intermittent periodic duty type with electric braking (S5)

A sequence of identical duty cycles, each consisting of a period of starting, a period of operation at constant load and a rest and de-energized period, but the operation period is so short that it is not sufficient for the machine to reach thermal equilibrium.

Standard Features

Type: 3 Phase Crane Duty Slip Ring Induction Motor

Efficiency level: High efficiency energy-saving

Frame size: 112~400 frame

Rated output: 1.5~200 kW

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

Rated frequency (speed):

50Hz (1000/750/600 r/min)

60Hz (1200/900/720 r/min)

No. of poles: 6P, 8P, 10P

Material of frame/housing: Cast iron

Service Factor: 1.00

Mounting methods: Horizontal foot mounted IM1001 (B3)

Insulation Class: F (155℃)

Temp. Rising: ΔT=80°K

Bearing type: Roller/Ball bearing

Working Duty: S3 (40%)

Connection: Star-conn. for 132kW and below; Delta-conn. for others 

Ambient Temperature: ≤40°C (general)  60°C (metallurgical)

Altitude: ≦1000 m.a.s.l

Ambient humidity: ≦90%

Protection Class: IP44, IP54, IP55

IC410, IC411 Totally-enclosed, fan-cooled

Lubricating: Grease lubricated bearings

Grounding lug: On the frame and terminal box

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

Customized frame size/power

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

Working Duty: S2, S3, S4, S5, S6, S7, S8, S9

Service Factor: 1.15 or above

Insulation class: H (180°C)

Ambient temperature: Above 40 °C (on request)

Altitude: ＞1000M (on request)

Mounting methods: B5, V1

Space heaters

Thermostats RTD

Thermal protection PTC

Bearing: SKF, FAG brand

NDE or both DE and NDE bearings are electrically insulated