These three-phase metallurgical industrial and crane motors, available with wound or squirrel cage rotors, are specifically designed for metallurgical cranes and similar heavy-duty machinery. Engineered with high overload capacity and exceptional mechanical strength, they are ideal for short duty cycles, intermittent periodic operations, and equipment that requires frequent starting, braking, or is exposed to vibration and shock.
Key Characteristics
Power output and mounting dimensions comply with IEC 72 standards
Suitable for operation at altitudes up to 1,000 m
Available in two insulation classes:
Class F: for ambient temperatures up to 40°C
Class H: for metallurgical industrial environments, suitable for temperatures up to 60°C (Note: Both classes share the same technical performance data)
Enclosure protection degrees:
IP44 for standard environments
IP55 for harsh metallurgical industrial conditions
The powerful solution to all heavy duty drive problems
Compact, and yet extremely powerful, are the units of the 300 series. Their planetary drive train makes them the ideal choice for all the severe duty applications where shock loadings and impacts are more the rule than the exception. The product configuration is highly versatile, due to several options as far as the mounting, the gear layout, the output shaft and the motor interface. All the features are available for each of the 18 finely spaced frame sizes, spanning over the 1,000 – 1,400,000 Nm torque range. Finding the perfect match to any drive problem is therefore more than a wish, it is something users can safely rely on – always.
Torque Range
1,000 – 500,000 Nm
Transmissible Mechanical Power
to 450 kW
Reduction Ratios Range
1:3.4 to 5,000
Gear Unit Version
In line Right angle (with bevel gear pair Gleason)
Output Configuration
Foot and flange mounted Output shaft: solid with key, splined, splined hollow hollow shaft with shrink disc
Gear Unit Input Configurations
IEC-normalized Motor Adaptors Solid Input Shaft
Applicable AC motors
Compact motors and brake motors M series IEC motors and brake motors BN series Single and dual speed motors
Main Brake Motor Features
DC and AC brake Fast Braking and/or brake releasing through SB, NBR, SBR optional electronic devices
The European Directive 94/9/EC (ATEX) defines the following hazardous areas:
Gas atmospheres: Zone 0, Zone 1, and Zone 2
Dust atmospheres: Zone 20, Zone 21, and Zone 22
Our LEX and LEN series motors are certified and qualified for installation in these hazardous environments as follows:
LEX series
Type of enclosure:
Ex nA II T3 IP65 II 3G
Ex tD A21 IP65 T135°C II 2D
Areas of use: Zone 2, Zone 21, Zone 22
Certification: No. ICEPI 07 ATEX 03C009
Certifying authority:ICEPI Institute, Piacenza, Italy — Notified Body No. 0066
LEN series
Type of enclosure:
Ex tD A22 IP55 T155°C II 3D
Area of use: Zone 22
Certification:Self-certified according to ATEX standards
GENERAL CHARACTERISTICS
The LEX and LEN series motors are designed and manufactured to comply with ATEX requirements for hazardous environments, ensuring maximum safety and reliability under specified service conditions.
CONSTRUCTION CHARACTERISTICS
All LEX and LEN series motors feature:
Housing: Cast iron
End shields: Cast iron
Terminal box: Cast iron, rotatable by 90°
Fan:
Polyethylene for frame sizes 80 to 280
Aluminum for frame sizes 315 and 355
Fan cover: Pressed steel for all sizes
STANDARD SPECIFICATIONS
LEX series motors: IP65 mechanical degree of protection
LEN series motors: IP55 mechanical degree of protection
