Description
The Reliance Electric 30V4060 is a heavy-duty DC industrial motor engineered for high-torque, variable-speed applications requiring precise control and exceptional durability. Part of Reliance’s renowned 30V Series (now under Rockwell Automation), this 40 HP (60 frame) motor delivers robust performance in demanding environments such as steel mills, paper machines, and extruder drives. Designed with a 240V DC armature and separately excited field (75V/150V DC), the 30V4060 features a TEFC (Totally Enclosed Fan-Cooled) enclosure that protects against contaminants while maintaining optimal thermal management. Its Class F insulation system allows continuous operation at 115°C ambient temperatures, supported by oversized roller bearings for extended service life under high radial/axial loads. The motor’s stabilized shunt field design ensures consistent torque across speed ranges, while laminated pole pieces minimize cogging for smooth starts/stops. As a cornerstone of industrial drive systems, the Reliance Electric 30V4060 balances power density, reliability, and serviceability for critical process applications.

30V4060 RELIANCE
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 30V4060 |
| Manufacturer | Reliance Electric (Rockwell Automation) |
| Product Type | DC Industrial Motor |
| Rated Power | 40 HP (30 kW) |
| Base Speed | 1150 RPM |
| Armature Voltage | 240V DC |
| Field Voltage | 75/150V DC (Separately Excited) |
| Enclosure | TEFC (IP54) |
| Frame Size | 5860 (60) |
| Insulation Class | F (155°C) |
| Duty Cycle | Continuous (S1) |
| Efficiency | 92.5% (Typical) |
| Bearings | 313 & 314 Roller Bearings |
| Commutation | Precision-ground Mica-Undercut |
| Weight | 780 lbs (354 kg) |
| Standards | NEMA MG1, IEEE 841 |
Main Features and Advantages
High-Torque Durability: The Reliance Electric 30V4060 delivers 250 lb-ft of torque at 1150 RPM, with 200% overload capacity for handling sudden load surges. Its double-sealed TEFC enclosure and corrosion-resistant paint (C5-M industrial grade) withstand harsh environments like chemical plants or coastal facilities.
Thermal Resilience: Optimized cooling fins and a balanced rotor reduce hot spots, enabling 40°C ambient operation without derating. Class F insulation extends winding life 3x versus Class B motors in high-heat applications.
Maintenance-Friendly Design: Front-mounted, replaceable brushes allow servicing without disconnecting drive couplings. Precision-ground commutators and oversized bearings achieve 25,000+ hour MTBF. Vibration levels stay below 0.15 in/sec even at full load.
Application Field
The Reliance Electric 30V4060 excels in high-inertia, variable-speed applications:
Steel Processing: Driving rolling mill stands and coil transfer cars requiring 2:1 constant torque range
Paper Manufacturing: Powering winders/unwinders with precise tension control (0.5% speed regulation)
Plastics Extrusion: Running screw conveyors in compounding lines needing smooth speed transitions
Mining: Operating hoists and conveyor systems in dusty, high-humidity environments
Marine: Propulsion drive motors for tugboats and dredgers with saltwater exposure

30V4060 RELIANCE
Related Products
Reliance 30V4030: 30 HP variant for medium-duty applications
Reliance 30V4100: 100 HP motor for high-power requirements
Rockwell 1398-DDM-020: Digital drive module for controlling 30V4060 motors
Reliance RG60-50: Gear reducer compatible with 60-frame motors
Rockwell 1321-3R-BD30: Brake package for dynamic stopping
Reliance F40-60: Forced-ventilation upgrade kit for extreme ambients
Rockwell 6181V-4SSC: Surge suppressor for commutator protection
Reliance TACH60-100: Tachometer feedback assembly






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