Allen Bradley PowerFlex 753 Variable Frequency Drive 20F1AND248AA0NNNNN

The Allen Bradley 20F1AND248AA0NNNNN is a high-capacity AC drive from the PowerFlex 753 series for heavy industrial applications. This model delivers powerful motor control for systems up to 200 horsepower under normal duty. It features robust air cooling, embedded analog and digital I/O, and a built-in dynamic braking transistor. The 20F1AND248AA0NNNNN is designed as an open-type chassis for panel mounting in controlled environments.

Drive Identification & Power Ratings

• Brand: Allen Bradley (Rockwell Automation)
• Model: 20F1AND248AA0NNNNN
• Series: PowerFlex 753 AC Drive
• Input Power: Three-Phase, 480 V AC (+10%/-10%) / 650 V DC Bus
• Input Design: AC Input with Precharge; No DC Input Terminals on this variant.
• Output Power (Normal Duty): 150 kW / 200 HP
• Output Power (Heavy Duty): 110 kW / 150 HP
• Output Current (ND): 248 Amps
• Output Current (HD): 186 Amps (Approx.)
• Frame Size: Frame 6

Key Features & Internal Configuration

• Embedded I/O: Analog and Digital Inputs/Outputs for direct control connectivity.
• Dynamic Braking: Integrated DB (Dynamic Brake) Transistor.
• EMI Filtering: Filter Installed with Jumper Removed (specific EMC configuration).
• Cooling Method: Forced Air Cooling with Internal Fan(s).
• Precharge Circuit: Standard for AC input to limit inrush current.
• Expansion Capability: 3 Optional Slots for add-on communication or I/O modules.
• Human Interface Module (HIM): Not included (blanking plate installed).
• Enclosure: Open Type, IP20/IP00 (chassis).

Physical & Environmental Specifications

• Unit Weight: 90.72 kg (200.00 lbs)
• Mounting Style: Panel Mount (requires substantial support structure).
• Operating Temperature: 0°C to 50°C (32°F to 122°F) without derating up to 40°C.
• Storage Temperature: -40°C to 70°C (-40°F to 158°F)
• Relative Humidity: 5% to 95% (non-condensing)
• Altitude: 0-1000m without derating; derate 1% per 100m above.
• Vibration & Shock: Built to withstand industrial vibration levels.

Electrical Performance & Protection

• Output Frequency Range: 0 to 590 Hz
• Overload Capacity: 150% of rated current for 3 seconds; 110% for 1 minute.
• Control Methods: Volts/Hertz (V/Hz), Sensorless Vector, Closed Loop Vector (with encoder option).
• Starting Torque: Up to 200% of motor rated torque in vector control modes.
• Speed Regulation: ±0.5% of base speed (sensorless vector).
• Carrier Frequency: Adjustable for motor noise and performance optimization.
• Protections: Overcurrent, overvoltage, undervoltage, ground fault, short circuit, motor overload, overtemperature, phase loss.

Installation & Mounting Guidelines

• Due to the significant weight, mount the drive on a reinforced, vertical panel within a sturdy electrical cabinet.
• Ensure a minimum clearance of 200 mm (8 in) above and below the unit for adequate airflow from the cooling fans.
• Use a mechanical lift or multiple personnel for safe handling during installation.
• Connect three-phase AC power to the input terminals L1/R, L2/S, L3/T using large-gauge copper conductors.
• Connect the motor leads to output terminals T1/U, T2/V, T3/W with cables sized for 248A.
• Install correctly rated disconnect switch and branch circuit protection (fuses or breaker) upstream.
• Establish a robust ground connection using the drive's Protective Earth (PE) terminal, following local codes.
• For EMC, use shielded motor cable and ground the shield at the drive end only.

Packaging & Shipping Details

• Package Contents: 1 x Allen Bradley 20F1AND248AA0NNNNN Drive Unit (Open Chassis)
• Documentation: Quick Start guide included; full manual available for download.
• Shipping Weight: Approximately 95 kg (209 lbs) with protective packaging.
• Shipping Methods: Freight shipment required, available via FedEx, UPS, or DHL Freight.
• Handling: Palletized shipment; use a pallet jack or forklift for unloading.

Warranty Information

• Coverage Period: 12 months from the original purchase date.
• The warranty covers defects in materials and manufacturing under normal operating conditions.
• Installation must adhere to all specified electrical, environmental, and mounting requirements.
• Technical support is available for configuration and integration planning.

Frequently Asked Questions (FAQ)

• What does "No DC Terminals" mean on this high-power drive?

It means this specific drive model does not have terminals to connect an external DC power source directly to its internal DC bus. It is designed for AC-only input. This simplifies the design for applications where DC bus sharing or backup is not required.

• Why is the EMI filter jumper removed on this model?

Removing the EMI filter jumper is a specific configuration that alters the filter's grounding. This is often done to comply with certain regional EMC standards or to prevent ground loop currents in large, complex electrical systems, ensuring stable operation.

• What can I install in the three expansion slots?

You can add optional modules such as communication adapters (EtherNet/IP, Profibus, DeviceNet), additional I/O cards, or an encoder feedback module for closed-loop vector control, allowing you to customize the drive for your network and control needs.

• How do I manage the substantial heat generated by a 200HP drive?

The internal forced air cooling is primary. You must install the drive in a well-ventilated electrical cabinet, possibly with additional cabinet cooling (fans, air conditioning) to maintain ambient temperature below 50°C, especially at full load.

• Is the 150% overload for 3 seconds sufficient for starting high-inertia loads?

This overload capability is designed for typical industrial breakaway torque. For extremely high-inertia loads (like large fans or grinders), you must verify the motor's starting current profile. You may need to oversize the drive (select a larger frame) or use a different starting method.

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