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"Siemens 1LG4101-4AA: Powerhouse Motor for J-Press Water Filtration Ex - $25,000 (concord / pleasant hill / martinez)
condition:
like new
engine hours (total):
125
make / manufacturer:
Siemens
model name / number:
800G25-25-10SYLW
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Detailed Description of the Siemens 1LG4101-4AA Motor
The Siemens 1LG4101-4AA is a robust, low-voltage, three-phase asynchronous (squirrel-cage induction) motor from Siemens' 1LG4 series, engineered for demanding industrial applications where reliability, efficiency, and durability are paramount. This motor is part of Siemens' lineup of non-IE (standard efficiency) or IE1-rated motors, designed to deliver consistent performance in continuous-duty operations. It features a cast-iron or aluminum housing (depending on the exact variant), which provides excellent mechanical strength and resistance to environmental stresses such as vibration, dust, and moisture. The motor's design adheres to IEC 60034 standards, ensuring global compatibility and ease of integration into machinery.
Key Features and Construction
Type and Design: Asynchronous induction motor with a totally enclosed fan-cooled (TEFC) enclosure (IP55 protection class), which safeguards against dust ingress and low-pressure water jets. The self-ventilating cooling system (IC411) uses an external fan mounted on the shaft to dissipate heat efficiently, maintaining optimal operating temperatures even under prolonged loads.
Rotor and Stator: Squirrel-cage rotor for smooth, maintenance-free operation with high starting torque. The stator windings are insulated with a Class F (155°C) system, offering thermal endurance for harsh conditions while allowing operation at Class B (130°C) temperatures for energy efficiency. The insulation protects against aggressive gases, vapors, oils, and humidity up to 30 g/m³ of water vapor.
Bearings: Typically grease-lubricated, deep-groove ball bearings on the drive end and cylindrical roller bearings on the non-drive end for high axial and radial load capacity. Regreasable designs extend service life in industrial settings.
Mounting and Dimensions: IM B3 foot-mounted configuration for horizontal installation, with a compact frame size (likely 100L or similar based on the "101" code, approximately 160-200 mm shaft height). Overall dimensions are optimized for space-constrained machinery, with standard foot holes for easy bolting to bases or gearboxes. Weight is estimated at 50-80 kg, depending on exact build.
Shaft and Terminals: Cylindrical shaft extension with keyway for direct coupling to loads. Terminals are accessible via a box on top, supporting flexible wiring configurations.
Electrical Specifications
Based on standard 1LG4 series data and the "-4AA" code (indicating 4-pole, 50 Hz base design, adaptable to 60 Hz), the motor is optimized for three-phase operation. Note: The previously mentioned 120V single-phase at 1A appears inconsistent with Siemens' documentation for this model, which is inherently three-phase and higher-powered. This could stem from a custom modification, phase converter use, or a labeling error—verification via the motor's nameplate is recommended.
ParameterSpecificationNotesVoltage400V Δ / 690V Y (standard 50 Hz); adaptable to 460V for 60 HzDelta (Δ) for direct start, Wye (Y) for star-delta starting. Not natively 120V single-phase; requires VFD or converter for such setups.PhaseThree-phaseAsynchronous design; single-phase adaptation possible but non-standard.Frequency50 Hz (base); 60 Hz compatible4-pole configuration yields ~1500 rpm at 50 Hz, ~1800 rpm at 60 Hz.Power Rating~2.2-3 kW (3-4 HP)Estimated for frame size; exact depends on variant (e.g., 1LG4101-4AAxx). Full-load torque ~14-20 Nm.Full Load Current~5-6 A at 400VPower factor ~0.82; efficiency ~77-79% (IE1/EFF2 class). Locked rotor current ~6-7x FLA.Efficiency ClassIE1 (standard efficiency, EFF2)Meets or exceeds NEMA MG1 and EPACT requirements; CC number CC 032A for U.S. compliance.Service Factor1.15Allows 15% overload for short durations without damage.Starting MethodDirect-on-line (DOL) or star-deltaInertia moment ~0.002-0.003 kg·m² for quick acceleration.
Performance Characteristics
Speed and Torque: Synchronous speed of 1500 rpm (50 Hz), with full-load speed ~1415-1440 rpm. Provides a torque curve suitable for applications requiring steady pull-up and breakdown torque (2.2-3x full-load).
Noise and Vibration: Low vibration levels per IEC 60034-14 (Grade N), with operational noise <75 dB(A) at 1m.
Ambient Conditions: Rated for -20°C to +40°C operation; derating applies above 40°C or at altitudes >1000m (e.g., 1% power loss per 100m above 1000m). Suitable for humidity up to 100 g/m³ with optional enhancements.
Safety and Compliance: Explosion-proof options available (e.g., ATEX), but standard version is for non-hazardous areas. Overload protection via thermal sensors optional.
Applications
This motor excels in general-purpose industrial drives, powering equipment that demands reliable, moderate-speed rotation. Common uses include:
Pumps and Compressors: Centrifugal or positive displacement types for fluid handling.
Conveyors and Fans: Belt-driven systems in material transport or ventilation.
Presses and Machinery: Hydraulic or mechanical presses for forming, stamping, or dewatering processes (see below for J-Press specifics).
Its high starting torque and overload capacity make it ideal for loads with inertial starts, while the TEFC design suits dusty or humid environments like mining, wastewater treatment, or food processing.
Maintenance and Lifespan
Routine checks: Bearing lubrication every 10,000-20,000 hours; winding insulation resistance testing annually.
Expected life: 20,000-50,000 hours under normal conditions, with modular design for easy repairs.
Accessories: Optional encoders for speed feedback, brakes for stopping, or vibration sensors for condition monitoring.