Basic Execution - General Characteristics
The document describes three-phase squirrel-cage medium voltage high-efficiency motors, specifically the Sh 355-560 series. These motors are known for their high energy efficiency, low vibration, and noise levels due to their compact and stiff frame construction. They are available in mechanical sizes ranging from 355 to 450 with rated power between 160-1800kW. Key specifications include a voltage of 6000V ± 5% and frequency of 50Hz ± 2%, continuous duty type S1, insulation class F, and an ambient temperature range of -20°C to +40°C. The motors are protected to IP55 standards and cooled using the IC411 method.

Application and Operational Conditions
These motors are designed for general industrial use, suitable for driving machines and devices that operate continuously without frequent starting and reversing. They can function in dusty environments, provided the dust concentration does not exceed 10 mg/m3, and the air is free from chemically aggressive contaminants. The motors are capable of restarting at 100% residual voltage and full phase opposition, with a lifetime of 5000 starts or 10,000 reverses. For outdoor use, it is recommended to protect the motors from rain, snow, and sunlight.

Changes in Ambient and Supply Conditions
The rated motor load is specified for an ambient temperature of +40°C and an altitude of up to 1000 meters above sea level. Adjustments may be necessary if these conditions change.

Balancing and Allowable Vibration Level
The rotor is balanced with a half-key installed in the free shaft extension, with a permissible vibration speed of 2.8 mm/s rms.

Bearings
The document details the types of bearings used in different motor sizes and configurations, including sleeve bearings for 2-pole motors and rolling bearings for others, with lubrication methods specified.

Thermal Winding Protection
Platinum thermo-resistors Pt100 are used for temperature protection against slow-changing overloads, with sensors placed in the stator winding and bearing nodes.

Technical Data
The document provides extensive technical data for various motor types, including rated power, speed, torque, efficiency, power factor, current, starting torque, starting current, breakdown torque, rotor inertia, mass, and sound pressure level.

Dimensional Drawing
Detailed dimensional drawings are provided for different mechanical constructions, including IM1001 (B3), IM1002 (B35), and IM3011 (V1), with specific measurements for each motor type.