1. Overview
This document explains the procedure to safely replace a rectifier module in the PSE (Power Supply Equipment).
📌 Caution:
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The PSE operates on AC 440V high voltage.
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Always follow safety protocols when handling and replacing the module.
2. Safety Warnings and Precautions
2.1 High Voltage Handling
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The PSE rectifier rack operates with AC 440V.
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Always ensure safety when working with high-voltage equipment.
2.2 Power Shutdown
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Before replacing or checking the module, shut off the AC input power.
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Use a digital multimeter to verify that the input voltage is 0V.
3. Precautions
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Use proper tools and exercise care during transportation to avoid damaging the module.
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The module is heavy—always work in a team of two.
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Avoid damaging rear-connected cables and components.
4. Step-by-Step Replacement Procedure
| Step | Action |
|---|---|
| 1 | Turn off the PSE breaker at the vessel’s MSBD (Main Switchboard). |
| 2 | Remove the four front bolts securing the module. |
| 3 | Open the rear duct cover of the PSE rack. |
| 4 | Confirm END and ID SETTING of the module to be replaced. |
| 5 | Double-check the AC input voltage is 0V using a multimeter. |
| 6 | Disconnect the AC input cable from the module. |
| 7 | Loosen the bolts securing the rectifier module’s DC Output side to the busbar. |
| 8 | Disconnect the CAN communication cable. |
| 9 | Unscrew the 8 rear bolts connecting the module to the rack. |
| 10 | Remove the old module and insert the new module. |
| 11 | Loosely fasten the front bolts of the new module. |
| 12 | Fasten the 8 rear bolts between the new module and the rack. |
| 13 | Fully tighten the front bolts. |
| 14 | After assembling the rectifier module's DC output side, connect the AC cables securely. |
| 15 | Reconnect the CAN cable and configure END and ID SETTING. |
| 16 | Switch on the PSE breaker at MSBD. |
| 17 | Once 440V input is confirmed, close the rear duct cover. |
5. Summary of Key Points
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Ensure all power is off and voltage is confirmed 0V before proceeding.
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Use two personnel for lifting.
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Reconnect all cables correctly, including communication.
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Reconfirm configuration settings (END and ID).
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Complete all fastening steps to secure module safely.
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