The DRG Motor product catalog is a comprehensive technical reference prepared for engineers, project managers and purchasing teams who select electric motors. The catalog presents all the technical data of our high-efficiency three-phase asynchronous motor series, together with power, speed, current, efficiency, power factor and starting values. By downloading the PDF files on this page, you can access the full technical tables of our IE3 (YE3) and IE4 (YE4) series motors.

What Is in the Catalog?

Our catalog brings together, in a single source, all the information you need for motor selection:

  • Type code (e.g. YE3-90S-4) and model designation,
  • Rated power (kW) and synchronous speed (3000 / 1500 rpm) for each power step,
  • Rated current (A), efficiency (η %) and power factor (cosφ),
  • Starting current ratio (Ist/In) and starting/maximum torque ratios,
  • Frame/mounting types and general operating conditions.

YE3 and YE4 Series Technical Specifications

The main characteristics of the high-efficiency three-phase asynchronous motors in the catalog are:

  • Frame centre height: 80 – 450 mm
  • Power range: 0.55 kW – 1000 kW
  • Rated voltage and frequency: 380 V / 50 Hz
  • Protection class: IP55
  • Insulation class: 155 (F)
  • Duty type: S1 (continuous)
  • Cooling: IC411 (surface fan cooled)
  • Connection: star for 3 kW and below, delta above 3 kW

Motors of 3 kW and below are supplied with a star connection, and those above 3 kW with a delta connection. The efficiency values comply with international standards, from IE3 class up to IE4 premium efficiency.

Frame and Mounting Options

The mounting type determines how the motor is connected to the machine. The mounting options offered by frame size are:

  • Frame 80 – 160: B3, B5, B6, B14, B34, B35, V1, V3, V5, V6, V15
  • Frame 180 – 280: B3, B5, B35, V1
  • Frame 315 – 450: B3, B35, V1

Quality Certificates and Operating Conditions

Our motors are manufactured to production standards holding CQC, CCC, ISO 9001, ISO 14001 and ISO 45001 certificates. Standard operating conditions are an ambient temperature between −15 °C and +40 °C and an altitude up to 1000 m above sea level. For special applications outside these values, simply contact us during the ordering stage.

How Should You Use the Catalog?

To select the right motor, first determine the power (kW) and speed (rpm) your application requires; then find the corresponding type code in the catalog table. The efficiency and power factor values help you estimate energy consumption and operating cost. Choose the mounting type according to how your machine connects. If you have any doubt during selection, our technical team will recommend the most suitable model for you.

Frequently Asked Questions

What is the power range of the motors in the catalog?

The catalog covers a wide power range from 0.55 kW to 1000 kW. The frame centre height varies between 80 mm and 450 mm, with a suitable option for almost every industrial application.

What is the difference between IE3 and IE4?

Both are high-efficiency classes; IE4 (premium efficiency) offers lower energy loss and higher efficiency than IE3 at the same power. This means lower electricity consumption and faster payback over the long term.