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Overview
The 59 Frame Capacitor Motor is a robust and versatile single-phase induction motor designed for applications requiring high starting torque and efficient running performance. Utilizing a dual-capacitor system (a start capacitor and a run capacitor), this motor delivers superior starting force and maintains high power factor and efficiency during continuous operation, making it an ideal solution for demanding industrial, commercial, and agricultural equipment.
Key Features & Advantages
High Starting Torque: The electrolytic start capacitor provides a significant phase shift during startup, generating exceptionally high breakaway torque—typically 200-300% of full-load torque—to easily overcome initial inertia in compressors, pumps, and heavily loaded machinery.
Efficient Continuous Operation: After startup, the motor switches to a permanent polypropylene run capacitor. This optimizes the motor's power factor and efficiency during run mode, reducing operating current, minimizing energy losses, and lowering electricity costs compared to simpler capacitor-start (CS) or shaded pole designs.
Robust & Durable Construction: Built within a standardized 59-frame (5.9" mounting face) die-cast aluminum or rolled steel housing, featuring Class F or higher insulation, double-shielded ball bearings, and a durable centrifugal switch mechanism for reliable capacitor switching.
Quieter and Cooler Running: The run capacitor helps create a more balanced two-phase operation, resulting in smoother torque delivery, reduced vibration, lower operating noise, and cooler running temperatures compared to split-phase motors.
Wide Application Versatility: The combination of high starting torque and efficient running makes it suitable for a broad range of medium-duty applications where three-phase power is unavailable.
NEMA Standard Configuration: The 56-frame is a NEMA (National Electrical Manufacturers Association) standard, ensuring interchangeable mounting dimensions, shaft height, and face mounting patterns with other motors of the same frame size, simplifying replacement and system design.
Typical Specifications
Motor Type: Single-Phase, Capacitor-Start/Capacitor-Run (CSCR) Induction Motor.
Frame: 56 Frame (5.9" mounting face, standard shaft height).
Power Supply: 115/230V AC, 60 Hz or 230V AC, 50 Hz (dual voltage models common).
Power Range: Typically from 1/4 HP (0.18 kW) to 3 HP (2.2 kW).
Speed: 1725 RPM (4-pole) or 3450 RPM (2-pole) at 60 Hz.
Duty Cycle: Rated for continuous duty (S1).
Capacitors: Includes both a high-value electrolytic start capacitor (in a separate enclosure) and a lower-value oil-filled run capacitor.
Enclosure: Typically Open Drip-Proof (ODP) or Totally Enclosed Fan-Cooled (TEFC).
Mounting: Rigid base mount or NEMA C-face mount with removable base options.
Primary Applications
This motor is the workhorse of industry where single-phase power and high performance are required:
Air Compressors: Stationary and larger portable compressors.
Pumps: High-pressure washers, irrigation pumps, deep-well pumps, and sump pumps.
Agricultural & Workshop Equipment: Large drill presses, woodworking machinery (e.g., table saws, planers), hay elevators.
HVAC & Refrigeration: Large condenser fan motors, blower fans in commercial units.
Material Handling: Conveyors, hoists, and other machinery needing strong starts.
Why Choose a 59 Frame Capacitor Motor?
When your application demands both the muscle to start under load and the efficiency to run for hours, the 59 Frame CSCR motor is the definitive single-phase solution. It bridges the gap between the moderate performance of a PSC (Permanent Split Capacitor) motor and the complexity of a three-phase system. Its standardized design, proven reliability, and superior performance characteristics make it the go-to choice for OEMs and maintenance professionals across countless industries.
Note: Proper selection requires matching the motor's horsepower and service factor to the application's load requirements. The external start capacitor and potential relay/centrifugal switch are critical components of the system and must be correctly sized and maintained. Always consult the motor's nameplate and wiring diagram for correct installation.
Overview
The 59 Frame Capacitor Motor is a robust and versatile single-phase induction motor designed for applications requiring high starting torque and efficient running performance. Utilizing a dual-capacitor system (a start capacitor and a run capacitor), this motor delivers superior starting force and maintains high power factor and efficiency during continuous operation, making it an ideal solution for demanding industrial, commercial, and agricultural equipment.
Key Features & Advantages
High Starting Torque: The electrolytic start capacitor provides a significant phase shift during startup, generating exceptionally high breakaway torque—typically 200-300% of full-load torque—to easily overcome initial inertia in compressors, pumps, and heavily loaded machinery.
Efficient Continuous Operation: After startup, the motor switches to a permanent polypropylene run capacitor. This optimizes the motor's power factor and efficiency during run mode, reducing operating current, minimizing energy losses, and lowering electricity costs compared to simpler capacitor-start (CS) or shaded pole designs.
Robust & Durable Construction: Built within a standardized 59-frame (5.9" mounting face) die-cast aluminum or rolled steel housing, featuring Class F or higher insulation, double-shielded ball bearings, and a durable centrifugal switch mechanism for reliable capacitor switching.
Quieter and Cooler Running: The run capacitor helps create a more balanced two-phase operation, resulting in smoother torque delivery, reduced vibration, lower operating noise, and cooler running temperatures compared to split-phase motors.
Wide Application Versatility: The combination of high starting torque and efficient running makes it suitable for a broad range of medium-duty applications where three-phase power is unavailable.
NEMA Standard Configuration: The 56-frame is a NEMA (National Electrical Manufacturers Association) standard, ensuring interchangeable mounting dimensions, shaft height, and face mounting patterns with other motors of the same frame size, simplifying replacement and system design.
Typical Specifications
Motor Type: Single-Phase, Capacitor-Start/Capacitor-Run (CSCR) Induction Motor.
Frame: 56 Frame (5.9" mounting face, standard shaft height).
Power Supply: 115/230V AC, 60 Hz or 230V AC, 50 Hz (dual voltage models common).
Power Range: Typically from 1/4 HP (0.18 kW) to 3 HP (2.2 kW).
Speed: 1725 RPM (4-pole) or 3450 RPM (2-pole) at 60 Hz.
Duty Cycle: Rated for continuous duty (S1).
Capacitors: Includes both a high-value electrolytic start capacitor (in a separate enclosure) and a lower-value oil-filled run capacitor.
Enclosure: Typically Open Drip-Proof (ODP) or Totally Enclosed Fan-Cooled (TEFC).
Mounting: Rigid base mount or NEMA C-face mount with removable base options.
Primary Applications
This motor is the workhorse of industry where single-phase power and high performance are required:
Air Compressors: Stationary and larger portable compressors.
Pumps: High-pressure washers, irrigation pumps, deep-well pumps, and sump pumps.
Agricultural & Workshop Equipment: Large drill presses, woodworking machinery (e.g., table saws, planers), hay elevators.
HVAC & Refrigeration: Large condenser fan motors, blower fans in commercial units.
Material Handling: Conveyors, hoists, and other machinery needing strong starts.
Why Choose a 59 Frame Capacitor Motor?
When your application demands both the muscle to start under load and the efficiency to run for hours, the 59 Frame CSCR motor is the definitive single-phase solution. It bridges the gap between the moderate performance of a PSC (Permanent Split Capacitor) motor and the complexity of a three-phase system. Its standardized design, proven reliability, and superior performance characteristics make it the go-to choice for OEMs and maintenance professionals across countless industries.
Note: Proper selection requires matching the motor's horsepower and service factor to the application's load requirements. The external start capacitor and potential relay/centrifugal switch are critical components of the system and must be correctly sized and maintained. Always consult the motor's nameplate and wiring diagram for correct installation.
