Okuma PSU-60-ACL U:2.01 R:303 DC Servo Power Supply Unit 60kW U3103-0006-001R

Okuma PSU-60-ACL U:2.01 R:303 DC Servo Power Supply Unit 60kW U3103-0006-001R Rebuilt Up for sale is a professional-grade, fully rebuilt Okuma PSU-60-ACL DC Servo Power Supply Unit . This heavy-duty power supply is engineered for demanding Okuma CNC machine tools and industrial servo drive applications. It converts incoming three-phase AC power into a highly stable high-voltage DC bus output, ensuring precision velocity and position control for attached high-capacity servo motor modules. Core Technical Differences Integrated Harmonic Filtering (-ACL variant): The PSU-60-ACL is designed to mitigate massive electrical noise. Drawing power for a 60kW system causes substantial voltage distortion on the factory grid. The integrated reactor choke stabilizes the incoming 3-phase AC voltage, suppresses high-frequency harmonics, and shields the internal inverter circuits (such as Okuma MIV drives) from damage. Modular Separation (Standard variant): The standalone PSU-60 focuses purely on rectifying incoming 3-phase 400Vâ480V AC power into a high-voltage DC bus link (typically outputs DC 566Vâ679V to feed high-voltage drives). Using this unit requires an external, separately mounted AC choke coil (such as Okuma part 1006-2284 or similar) wired inside the electrical cabinet. Specifications Comparison OKUMA PSU-60-ACL OKUMA PSU-60 Primary Function 60kW Power supply with integrated line reactor Primary Function 60kW Standalone DC power converter Input Voltage 3-Phase AC 400â480V (50/60 Hz) Input Voltage 3-Phase AC 400â480V (50/60 Hz) Rated Output Capacity 60 kW continuous (~80 HP drive capacity) Rated Output Capacity 60 kW continuous (~80 HP drive capacity) DC Bus Output Approx. DC 566Vâ679V high-voltage link DC Bus Output Approx. DC 566Vâ679V high-voltage link Fault Protection Built-in short circuit (50 kA RMS SYM) & peak dampening Fault Protection 50 kA RMS SYM (Requires external choke protection) Cooling Method Heavy-duty internal forced-air dual fan arrays Cooling Method Heavy-duty internal forced-air dual fan arrays Replacing an Okuma PSU-60 with a PSU-60-ACL is highly possible and common when sourcing emergency spares, but it is not a drop-in physical swap . Because the standard PSU-60 uses an external choke mounted elsewhere in the electrical cabinet, while the PSU-60-ACL has the choke integrated inside its own housing, you must perform specific mechanical and electrical modifications to prevent immediate drive alarms or hardware damage . If replacing an Okuma PSU-60 with a PSU-60-ACL Bypassing the Existing External Choke On your original PSU-60 setup, the incoming 3-phase AC power runs from the main circuit breaker/contactor, through an external AC choke coil (typically Okuma part 1006-2284 or MPS60-ACL), and then into the power supply's AC input terminals (L1, L2, L3). Because your new PSU-60-ACL already contains its own choke coils, running power through both chokes will cause an excessive voltage drop under load, resulting in immediate DC Bus Undervoltage or MIV Inverter Faults during heavy spindle acceleration. Disconnect the External Choke: Disconnect the heavy-gauge wires going to the existing standalone choke coil in the cabinet. Route Power Directly: Re-route the incoming 3-phase AC source lines directly to the main input terminals of the new PSU-60-ACL . Physical Removal: You can leave the old choke bolted into the back of the cabinet as dead weight, or remove it entirely to reclaim panel space. 3. Wiring and Control Jumpers Input and DC Bus (L1/L2/L3 and P/N): Connect your 3-phase AC input lines to L1, L2, and L3. Connect the heavy DC bus bars or cables to the P and N terminals which daisy-chain out to your MIV servo and spindle drives. Converter Link (CN1): Plug the standard fiber-optic or serial control link cable back into the CN1 port. This allows the OSP control platform (such as P200 or P300) to monitor the power supply status. ID Selector Jumpers (If Applicable): Check the small rotary ID switches or pin jumpers on the upper control card of both units . Ensure the switch settings on the replacement PSU-60-ACL exactly match the position of those on the old PSU-60 so the machine's NC executive software recognizes the unit properly . 4. Post-Installation Verification Turn on main control power without enabling the machine's hydraulics or emergency stop string. Check the built-in LED status display on the face of the PSU-60-ACL . It should show a normal standby status (typically a steady dot or code indicating ready) and should not flash an "AL" or numerical fault code. Release the E-stop and power up the drives. Monitor the DC bus voltage diagnostic page on your Okuma OSP screen while gently spinning the spindle to ensure the power regeneration path is stable. CONDITION: OKUMA CERTIFIED REBUILD. WARRANTY: 120 DAYS (LIMITED 1 YEAR) SAME DAY SHIPPING AVAILABLE ON ORDERS MADE BEFORE 4PM EST. (CAN SHIP COLLECT ON UPS OR FEDEX ACCOUNT) ________________________________________________________________________________ BTop-7