Controlled line current
AFE switching shapes the input-current path as energy moves between the AC supply and internal DC bus.
Allen-Bradley · PowerFlex 755T
Allen-Bradley 20GE7ND248LNANNNNN PowerFlex 755T Low-Harmonic AFE Drive
AC DRIVE755T1 CATALOG NUMBER
Product Description
Allen-Bradley 20GE7ND248LNANNNNN is a PowerFlex 755T low-harmonic drive with an active front end and TotalFORCE control. In a 480 V three-phase motor system, its AFE manages the line-side conversion into the DC bus, while the motor-side converter produces controlled output for the connected motor and the control platform coordinates torque, speed and power operation.
The architecture of 20GE7ND248LNANNNNN combines Frame 6 wall-mount hardware, XT corrosive-gas protection, forced-air cooling, standard EMI protection and an aluminum system DC bus. Light-, normal- and heavy-duty ratings define separate load classes, while the no-HIM selection, inline back-to-back arrangement and installation requirement to remove power modules establish clear handling and access boundaries.
Technical Specifications
| Technical Item | 20GE7ND248LNANNNNN |
|---|---|
| Brand | Allen-Bradley |
| Product Type | PowerFlex 755TL |
| Brand Country | United States |
| Corrosive Gas Protection and Cooling Type | Corrosive Gas Protection (XT), Forced Air |
| Voltage Class | 480 VAC, 3 PH |
| Current / Power Rating | LD - 250HP (302A), ND - 200HP (248A), HD - 150HP (186A) |
| Enclosure Type | Open Type/IP00; Wall Mount |
| Input Type | Low Harmonic, AFE (Wall Mount/Freestanding) |
| Frame Size | Frame 6 |
| Protection & Filtering | Standard EMI Protection |
| Dynamic Braking | None |
| HIM & Control Type | No HIM & TotalFORCE Control |
| System DC Bus Bars | System 3000A Aluminum Bus Bar |
| DC Bus Conditioner | Standard Installation - Grounded |
| Back to Back Configuration | Inline |
| Torque Accuracy | No |
Low-Harmonic AFE Operation
PowerFlex 755T
The active front end controls the line interface rather than using a simple diode input stage.
DC-bus link
The regulated DC bus forms the energy connection between the active front end and motor-side converter.
Motor-side output
The output converter applies TotalFORCE control to produce the commanded motor voltage, frequency and torque response.
TotalFORCE Control Structure
Control, power modules and bus hardware operate as one 755T drive system.
Duty-class processing
The controller applies the selected light-, normal- or heavy-duty limits to the corresponding current and motor-power class.
System bus hardware
The configuration uses the stated 3000 A aluminum system bus and grounded DC-bus conditioner arrangement.
Module handling
Most installations require module removal; the cabinet and work area must accommodate that service operation for the Frame 6 assembly.
Frequently Asked Questions
A project requires a controlled line-side conversion stage rather than a conventional diode input. What architecture does 20GE7ND248LNANNNNN use?
20GE7ND248LNANNNNN uses an active front end to control the AC-to-DC input path. That AFE stage is the basis of its low-harmonic drive configuration.
The same motor is evaluated for light, normal and heavy service. Which 20GE7ND248LNANNNNN power value belongs in the selection?
Use the light-, normal- or heavy-duty rating that matches the required overload profile. The three values identify separate duty classes rather than additive output capacity.
Commissioning requires local viewing at the drive. What must be planned for 20GE7ND248LNANNNNN?
The drive uses TotalFORCE control, but the ordered HIM position is blank. A compatible local parameter-access method must be provided separately when local viewing is required.
Corrosive gas is present in the equipment area. Does the XT option make 20GE7ND248LNANNNNN a sealed outdoor drive?
No. XT corrosive-gas protection is included, but the unit remains a forced-air-cooled open-type / IP00 wall-mount drive and still needs the appropriate installation environment.
The installation route cannot accommodate full cabinet weight and size in one lift. What feature of 20GE7ND248LNANNNNN affects the handling plan?
Its configuration notes that power modules are removed for most installations. Access, lifting equipment and work space must therefore accommodate the documented module-removal process.
Moore Automation
Company Profile
Moore Automation is an independent supplier of industrial automation spare parts serving customers in multiple regions. Its inventory and sourcing activity cover brand-new, discontinued and difficult-to-source control, monitoring and drive components.
independent supplymulti-region servicenew and discontinued partsautomation spare parts
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