YE2 Three-Phase Induction Motor Series

The YE2 three-phase induction motor series is built for machinery that has to keep running in demanding plant conditions — petrochemical, chemical, steel and mining environments where dust, moisture, heat and continuous load are the normal operating state rather than the exception. The series spans 0.75 kW to 90 kW across frame centre heights H80 to H280, with 2, 4, 6 and 8 pole versions, IP55 enclosure protection and Class F insulation with temperature rise evaluated to Class B.

The design meets the technical requirements of GB/T 28575-2020 for two-, four-, six- and eight-pole three-phase induction motors, and mounting dimensions conform to the IEC standard, so the motors install on existing IEC-pattern baseplates without re-machining. Construction is totally enclosed and self-fan-cooled (IC411), which removes the need for external ventilation ducting — an advantage in dusty plants where forced-ventilation motors clog and overheat. The rotor is die-cast aluminium for high operational reliability and consistent performance across the production run.

Because the series is supplied with a range of protective and monitoring provisions, it also suits installations where the motor is difficult to access. Motors with frame centre height H160 and above can be fitted with an on-line oil filling and draining device, so bearings can be lubricated without dismantling the machine, and spaces are reserved for thermistors and anti-condensation heating bands for users who need winding temperature monitoring or protection against condensation during idle periods.

Key Features

Built for harsh plant environments

• – suited to petroleum, chemical, steel and mining installations as well as general machinery.

IP55 enclosure protection

• – dust-tight and protected against water jets, reducing contamination-related failures.

Class F insulation, Class B temperature rise

• – a large thermal margin that extends insulation life at high ambient temperatures.

Totally enclosed, self-fan-cooled (IC411)

• – no external ducting to clog in dusty conditions.

Die-cast aluminium rotor

• – high operational reliability and stable performance in continuous service.

Power range 0.75 kW to 90 kW

• – covers pump, fan, compressor and conveying drives across the plant.

Frame centre heights H80 to H280

• – IEC dimension series for straightforward installation and replacement.

2, 4, 6 and 8 pole options

• – match drive speed to the machine rather than adding reduction equipment.

On-line oil filling and draining device

• – available on frames H160 and above, for bearing lubrication without dismantling.

Provisions for thermistors and anti-condensation heating bands

• – spaces reserved on frames H160 and above for winding monitoring and moisture protection.

Wide voltage capability

• – 380 V as standard, with any voltage between 220 V and 760 V available on request.

Low noise and compact structure

• – convenient operation and maintenance in restricted plant areas.

Operating Conditions

Condition	Value
Ambient temperature	-15 °C to +40 °C
Altitude	Not exceeding 1000 m
Rated voltage	380 V; any voltage between 220 V and 760 V available upon request
Rated frequency	50 Hz / 60 Hz
Degree of protection	IP55
Insulation class	Class F, Class H
Cooling method	IC411
Duty type	S1
Connection	Star (Y) for motors rated 3 kW and below; Delta (△) for motors rated 4 kW and above

Specifications

Parameter	Details
Series	YE2 three-phase induction motor series
Construction	Totally enclosed, self-fan-cooled, squirrel-cage
Power range	0.75 kW – 90 kW
Frame centre height	H80 – H280
Poles	2, 4, 6, 8
Efficiency class	IE3 (IEC 60034-30-1)
Insulation class	Class F, Class H; temperature rise evaluated to Class B
Enclosure protection	IP55
Cooling method	IC411
Duty type	S1 continuous
Mounting	Foot-mounted and flange-mounted to IEC dimensions
Optional devices	On-line oil filling and draining device; reserved space for thermistors and anti-condensation heating bands (frames H160 and above)
Rotor	Die-cast aluminium

Mounting Dimensions

The series publishes mounting dimensions for every frame so the motor can be dropped onto an existing baseplate. Each frame is listed with its pole availability (2, 4, 6 and 8) and the following dimension groups:

Foot and shaft dimensions:

• A, B, C (foot positions relative to the shaft), D (shaft diameter), E (shaft extension), F and G (key dimensions), H (frame centre height), K (foot hole diameter)

Overall dimensions:

• AB, AC, AD, HD, HF and L, for baseplate layout and clearance checks

Flange dimensions:

• M, N, P, R, S, T and the flange hole count for flange-mounted (B5 / B14) variants

Frames covered run from 80M and 90S/90L through 100L, 112M, 132S/132M, 160M/160L, 180M/180L, 200L, 225S, 250M to 280S/280M. Because the dimension tables differ between foot-mounted and flange-mounted variants, confirm the mounting code and shaft dimensions against your machine drawing before ordering.

Applications in Demanding Industries

Petrochemical plants

• – pump and compressor drives in areas where moisture and hydrocarbon vapour are present.

Chemical processing

• – agitators, mixers and process pumps operating under continuous duty.

Steel works

• – rolling-mill auxiliaries, cooling-water pumps and dust-extraction fans at high ambient temperatures.

Mining

• – crushers, conveyors and slurry pumps in dusty, high-vibration environments.

Water treatment and pumping stations

• – long-running pump sets where access for maintenance is limited.

Fans, blowers and dust extraction

• – the self-fan-cooled design avoids the clogging that affects externally ventilated motors.

Compressors and conveying machinery

• – general plant drives across the 0.75 kW to 90 kW range.

Machine tools and packaging machinery

• – cleaner-area applications where the same series is used for spares commonality.

Protection, Insulation & Optional Devices

Three features are worth checking against your installation:

IP55 enclosure protection

• limits the ingress of dust and water jets, which is the first line of defence against contamination failures in mining and steel environments. Class H insulation is available where higher ambient or winding temperatures are expected.

Class F insulation with Class B temperature rise

• keeps the winding running well below its insulation limit, which is what delivers the long service life expected of a motor that cannot easily be taken out of service.

Frames H160 and above can be specified with an on-line oil filling and draining device

• , so bearings can be greased or oiled while the motor is in place. The same frames reserve space for thermistors for winding temperature monitoring and for anti-condensation heating bands, which protect against moisture build-up during long idle periods — a common failure mode in plants with intermittent duty cycles or humid standstill conditions.

Standards & Compliance

GB/T 28575-2020

• – technical specifications for the YE2 series three-phase induction motors

IEC 60034

• – rotating electrical machines; mounting dimensions conform to the IEC standard

IEC 60034-30-1

• – IE3 efficiency class

GB 18613

• – minimum allowable values of energy efficiency and energy efficiency grades for small and medium three-phase asynchronous motors

Ordering & Support

Application review:

• share the driven machine, environment (dust, moisture, ambient temperature), duty cycle and mounting arrangement, and we will confirm the frame, pole count and protection options.

Optional device configuration:

• specify the on-line oil filling and draining device, thermistors or anti-condensation heating bands where the frame permits.

Voltage options:

• 380 V as standard; any voltage between 220 V and 760 V available upon request.

Mounting configuration:

• foot-mounted and flange-mounted variants to IEC dimensions.

Documentation:

• dimensional drawings and technical parameter data for the selected frame available on request.

Technical demo:

• request a technical demo and quotation through the enquiry form on this page.

FAQ

Q: What makes the YE2 three-phase induction motor series suitable for harsh environments?

A: The motors use a totally enclosed, self-fan-cooled (IC411) construction with IP55 enclosure protection, which limits dust and water ingress without external ventilation ducting that could clog. Class F insulation with temperature rise evaluated to Class B provides thermal margin at high ambient temperatures, and Class H insulation is available.

Q: Which industries is this induction motor series designed for?

A: It is widely used for general machinery — fans, water pumps, machine tools, compressors and conveying machinery — and is also applied in harsh environments including petroleum, chemical, steel and mining industries.

Q: What optional devices are available?

A: Motors with frame centre height H160 and above can be equipped with an on-line oil filling and draining device, and the same frames reserve space for thermistors and moisture-proof anti-condensation heating bands, so users can add winding monitoring or condensation protection.

Q: What are the operating limits?

A: Ambient temperature -15 °C to +40 °C, altitude not exceeding 1000 m, 380 V rated voltage at 50 Hz or 60 Hz, IP55 protection, IC411 cooling and S1 duty. Any voltage between 220 V and 760 V is available upon request.

Q: What is the power and frame range?

A: 0.75 kW to 90 kW across frame centre heights H80 to H280, in 2, 4, 6 and 8 pole versions, with foot-mounted and flange-mounted options.

Q: Do the mounting dimensions match IEC standards?

A: Yes. Mounting dimensions conform to the IEC standard, and the series publishes foot, shaft and flange dimension tables for each frame from 80M through 280S/280M. Confirm the mounting code and shaft dimensions against your machine drawing before ordering.