Overview
The Allen-Bradley 1333-AAB is a digital variable frequency AC drive engineered for precise motor control in industrial automation and general-purpose applications. The 1333-AAB delivers a nominal rating of 1 horsepower (0.75 kW) at 460 Volts AC with robust three-phase operation. This discontinued drive employs pulse-width modulation (PWM) to dynamically adjust output frequency and voltage, enabling superior speed regulation for connected AC motors.
Key Features
- Programmable Acceleration/Deceleration: Four independent ramp profiles, adjustable from 0.1 to 1600 seconds
- Pulse-Width Modulation Control: Sine-coded PWM delivers precise frequency control from 0 to 400 Hertz with ±0.5% regulation
- Volts-per-Hertz Motor Control: Automatic torque boost up to 40% and 150% starting torque capability
- Overload Protection: 140% overload capacity for one minute; programmable over-current and ground-fault detection
- Flexible I/O Configuration: Multiple control inputs (digital and analog), one NO output contact, and 0–10 VDC or 4–20 mA analog output
- NEMA Type 1 Enclosure: IP20-rated design suitable for protected installation in panel boards
Technical Specifications
- Output Power Rating: 1 Horsepower (0.75 kW)
- Input Voltage: 380–460 Volts AC, 3-phase, 50/60 Hertz
- Input Current: 3.3 Amps at 460 VAC
- Input Power: 2.6 kVA at 460 VAC
- Output Current: 2.1 Amps at 460 VAC
- Output Power: 1.7 kVA at 460 VAC
- Output Frequency Range: 0–400 Hertz, programmable
- Stopping Frequency: 0.5–60 Hertz
- Output Frequency Regulation: ±0.5% at –10 to 50°C
- Bus Overvoltage Trip: 810 Volts DC
- Bus Under-Voltage Trip: 310 Volts DC
- Enclosure Rating: NEMA Type 1 (IP20)
- Operating Temperature Range: –10 to 50°C (14 to 122°F)
- Dimensions: Approximately 9 × 11 × 6 inches
- Input Voltage Tolerance: ±10%
- Control Method: Volts-per-Hertz with sine-coded PWM
Typical Applications
The Allen-Bradley 1333-AAB drive supports a wide range of industrial motor-control applications, including:
- HVAC fan and pump motor speed control
- General-purpose industrial machinery drives
- Material handling and conveyor systems
- Process automation requiring smooth motor ramping
- Legacy equipment retrofit and replacement installations
- Applications requiring precise frequency and voltage regulation in protected environments
Compatibility & Replacements
Compatible With
- Three-phase AC induction motors (NEMA and IEC frame sizes)
- Industrial process control systems requiring VFD integration
- Panel-mounted installations with external control logic
- Standard industrial electrical infrastructure (380–460V, 3-phase)
Replaces / Drop-In Replacement For
- Earlier Allen-Bradley 1333 series drives (1333-AAA, 1333-AAN in equivalent configurations)
- Legacy three-phase frequency drives in the 0.75–1.0 kW range
- Note: Verify installation compatibility and control interface requirements with your system integrator before ordering.
Works With
- Standard three-phase AC motor controllers and starters
- Industrial PLC and automation networks compatible with analog control signals (0–10 VDC, 4–20 mA)
- Basic digital I/O systems for start/stop and fault monitoring
- Rockwell Automation legacy industrial control systems
- External protective relays and thermal overload devices
