Basic Info.

Product Description

Product Introduction: Y and YR280–355 (IP23) Series Compact, Low-Voltage, High-Power Three-Phase Asynchronous Motors

With over seventy years of expertise in intelligent motor manufacturing and a foundation of deep technical know-how and mature R&D and production systems, Changsha Changli Electric Co., Ltd. has independently developed the Y and YR280–355 (IP23) series of compact, low-voltage, high-power three-phase asynchronous motors. These represent a new generation of high-quality flagship products resulting from the company's continuous innovation and upgrades. Featuring an aesthetically pleasing design and a unique, scientifically engineered structure, this series boasts technical and economic performance indicators that rank among the best in the industry. The products are manufactured through standardized, large-scale processes; renowned for their stable and superior performance, they are best-sellers across China and are exported to over 20 countries and regions worldwide. Widely adaptable to various industrial operating conditions, they have earned high recognition and consistent praise from domestic and international customers alike.

This series utilizes premium raw materials combined with advanced, precision manufacturing and processing techniques. The motors offer outstanding overall performance, characterized by high energy efficiency, low vibration, operational stability, low failure rates, ease of installation, and simple maintenance. Capable of long-term, continuous, and stable operation, they are highly practical and versatile, making them suitable for a wide range of standard industrial production scenarios. Additionally, the company offers customized upgrades—such as IP44 duct-ventilated and IPW24 weather-protected versions—to meet specific operational requirements and diverse application needs.

The parameters for the entire product series strictly adhere to authoritative domestic and international standards. Power ratings, electrical performance, mounting dimensions, and tolerance precision fully comply with GB 755 ("Rotating electrical machines – Rating and performance"), IEC 34-1 ("Rotating electrical machines – Rating and performance"), as well as national and industry standards such as JB 5272-91 and JB 5269-91. With precise specifications and excellent versatility, these motors integrate seamlessly with a wide variety of associated equipment. This series of motors features a standard enclosure protection rating of IP23, strictly complying with the GB4942.1 and IEC34-5 standards ("Degrees of protection provided by the integral design of rotating electrical machines"). They offer effective protection against solid foreign objects and dripping water, making them suitable for standard, clean industrial environments while ensuring safe and reliable operation. Utilizing the IC01 open-type natural ventilation cooling method—in accordance with GB/T1993-93 and IEC34-6 standards ("Methods of cooling for rotating electrical machines")—the motors provide efficient heat dissipation. This effectively prevents heat accumulation, ensuring stable, long-term operation of the equipment.

Regarding structure and mounting, the product line primarily covers two configurations: IMB3 (horizontal mounting with feet and no end-shield flange) and IMV1 (shaft-down mounting with a flange on the bottom end-shield). These fully adhere to GB997 and IEC 34-7 standards ("Types of construction and mounting arrangements of rotating electrical machines"), offering flexible installation options and broad applicability to meet diverse equipment layout and installation requirements.

This product catalog primarily details the technical specifications and standard mounting dimensions for 380V motors. It also supports customization and specification expansion, allowing for the derivation of models compatible with various voltage levels—such as 440V and 660V—to meet the power supply conditions of different regions and industrial production lines with strong adaptability.

Application Scope

This series of electric motors is designed to drive various general-purpose equipment—such as compressors, fans, water pumps, machine tools, and transport machinery—and serves widely as a prime mover in industrial and mining enterprises, including those in mining, machinery manufacturing, petrochemicals, and power generation. For applications involving high-inertia loads—such as blowers, coal mills, rolling mills, crushers, and belt conveyors—users must provide relevant technical parameters and sign a technical agreement with us; this data serves as the basis for the motor's specialized design to ensure reliable operation.

**Key Characteristics and Operating Conditions of the YR(IP23) Series**

The YR(IP23) series motors deliver high locked-rotor torque with relatively low locked-rotor current and support limited-range speed regulation. They are suitable for five typical operating scenarios:

1. The locked-rotor torque required by the load exceeds the capability limits of squirrel-cage motors.

2. The power grid capacity is insufficient to support the direct-on-line starting of squirrel-cage motors.

3. The equipment requires long start-up times or involves frequent start-stop operations.

4. The operating conditions require limited-range speed regulation.

5. Synchronous operation of multiple machines via an electrical shaft is required.

Typical applications include compressors, presses, winches, water pumps, conveyors, and printing presses.

**Standard Operating Conditions**

1. Altitude: ≤1,000 meters

2. Ambient temperature range: -15°C to 40°C

3. Maximum relative humidity: 90% (monthly average of daily maximums) with a monthly average minimum temperature of ≤25°C

4. Power supply frequency: 50 Hz (allowable fluctuation: ±1%)

5. Operating voltage fluctuation: Within ±5% of rated voltage

6. Rated duty cycle: Continuous duty (S1)

Construction Description

The motor frames and end shields in this series are constructed from high-rigidity cast iron, featuring a stator design with an external press-fit assembly. For frame sizes H315 and H355, stator windings utilize either pre-formed rigid rectangular copper coils or pre-formed round copper coils (random-wound); insulation classes of either B or F are available. Winding end turns are secured using a specialized lashing process, and the entire stator undergoes Vacuum Pressure Impregnation (VPI) with Class F solvent-free varnish, ensuring excellent insulation performance as well as outstanding moisture and vibration resistance.

The squirrel-cage rotors feature a cast-aluminum design for stable and reliable operation, while the wound rotors across the entire series utilize Class F insulation materials and undergo Class F solvent-free varnish VPI treatment. The motors come standard with rolling-element bearings and a base protection rating of IP23.

Models with frame sizes 315–355 are equipped with a dedicated lubrication system, allowing for grease replenishment and drainage without stopping the motor. The main terminal box features a sealed design with an IP54 protection rating; it is typically mounted on the right side (drive end view) but can be relocated to the left side upon request, and includes a dedicated internal grounding terminal.

Startup Performance and Usage Precautions
This series of induction motors utilizes advanced computer technology to precisely calculate the temperature and pressure within the squirrel-cage rotor during startup, effectively preventing premature rotor failure caused by startup overloads. Please strictly adhere to the following requirements during operation:

The load moment of inertia, referred to the motor speed, must not exceed the upper limit specified for "Load Moment of Inertia (J)" in the technical data table.

At the moment of startup, the grid voltage at the motor terminals must not fall below 85% of the rated voltage.

The load torque characteristics of the driven machinery must match those of pumps or fans.

Provided the above conditions are met, the motor is permitted to undergo two consecutive starts from a cold state or one start from a hot state, with the interval between starts corresponding to the natural coast-down time; if these startup limits are exceeded, a one-hour waiting period is required before attempting another start.

If the actual load moment of inertia exceeds the specified value, or if there are special requirements such as frequent starting or heavy-load starting, please contact us in advance to discuss a customized design solution that ensures reliable motor startup and operation.

Certifications

We have obtained such certifications as CE, CCC, EAC, ISO 9001, ISO 14001, ISO45001, etc. Our motor series comply with IEC, NEMA, GOST, ISO, IEEE, JIS, AS standards.

Seaworthy packaging meeting export standards

Packaging utilizes either fumigation-free plywood or solid wood treated in compliance with IPPC fumigation standards; it is fully suited for long-distance, cross-border maritime transport and meets the quarantine entry requirements for wood packaging in the majority of countries and regions worldwide.

Company Profile

Located in Changsha, central China's Hunan province, Changli Electric Co., Ltd., a subsidiary of Changli Group, which was formally known as Changsha Motor Factory founded in 1946, is a leading electric motor manufacturer among Top 10 industrial electric motor manufacturers in China. With over 70 years' production experience and research and development capabilities, we can produce a wide range of motors. After years' development, we have several branches, offices and marketing centers around the country.
With an investment of 1094 million yuan, the company covers an area of 400mu (about 270, 000m2), has over 600 sets of precision production equipment, with annual production capacity of 8, 000 MW.
At present, we have over 350 employees, in which engineers and technicians accounting for 18%. With a strong technical research and development team and over 70 years' manufacturing experience, we can produce various kinds of low voltage motors, medium voltage motors and high voltage motors.
Our testing center is Hunan Medium and Small Sized Motors Quality Supervision Station, an authorized test station of China National Quality Inspection Center, is responsible for the quality supervision and sampling inspection of motor products of various motor manufacturers in Central and Southern China. We can test 40 series of high and low voltage motors.
Our products include standard motors, synchronous/asynchronous motors, high efficiency motors, premium efficiency motors, explosion proof motors, special motors, variable frequency speed regulation motors, ultra-high speed motors, submersible motors, wound rotor slip ring motors, permanent magnet motors, large-sized vertical circulating pump motors, etc.

Our Advantages

Wide power range availableExcellent starting performanceAvailable to all industry segments and applications in global supplyHighest reliability to minimize operation cost from downtimeHigh flexibility with customizable designSupport  to witness FAT on site/online

Quality Control

In-process Inspection/ Quality Control
All the measuring apparatus and instruments are calibrated each year.
Quality control for each item

Test

Each motor must be tested before leaving the factory. After the motor is qualified, the motor can be shipped out. Each motor will have a test report.

After Sales Service

Standard warranty: 12 months after commissioning, or 18 months after delivery, whichever comes first.

If you would like to extend the warranty period, please contact us for details.