The **PDU-BP3R-R/Q** is a high-performance Power Distribution Unit (PDU) typically used in server racks, data centers, and industrial computing environments. It is designed for redundancy and "bypass" capabilities, allowing maintenance on a UPS (Uninterruptible Power Supply) without shutting down the connected load. --- ### Key Electronic Components and Specifications The electronic architecture of this unit focuses on power routing, surge protection, and circuit management. | Component Category | Details & Specifications | | :--- | :--- | | **Input Power Interface** | Typically supports 100-240V AC; uses industrial-grade terminal blocks or high-amp plugs (like NEMA L6-30P or IEC 60309). | | **Bypass Switch** | A manual rotary or toggle switch that electronically reroutes current from the UPS output directly to the Utility line. | | **Circuit Breakers** | Equipped with electromagnetic or thermal-magnetic breakers (often 20A or 30A) for overcurrent protection. | | **Output Receptacles** | A combination of IEC C13 (10A) and IEC C19 (16A/20A) outlets to power diverse server hardware. | | **LED Indicators** | Visual electronic indicators for "Utility Power Available," "UPS Power Available," and "Bypass Mode Active." | --- ### Functional Electronic Features #### 1. Dual-Path Logic The unit contains internal copper busbars and high-capacity relays designed to handle "Make-Before-Break" transitions. This ensures that when switching from UPS power to Utility power (Bypass), there is no millisecond drop in voltage that would cause a server to reboot. #### 2. Surge Suppression & Filtering Integrated Metal Oxide Varistors (MOVs) are often included to protect downstream equipment from voltage spikes and electromagnetic interference (EMI) that might originate from the utility grid. #### 3. Maintenance Bypass System (MBS) The "BP" in the model name stands for **Bypass**. The electronic circuitry allows for: * **Normal Mode:** Utility $\rightarrow$ UPS $\rightarrow$ PDU $\rightarrow$ Servers. * **Bypass Mode:** Utility $\rightarrow$ PDU $\rightarrow$ Servers (allowing the UPS to be disconnected/replaced). --- ### Technical Schematic Overview ```mermaid graph LR A[Utility Power] --> B{Bypass Switch} C[UPS Unit] --> B B --> D[Circuit Breakers] D --> E[Output Outlets C13/C19] D --> F[Status LEDs] ``` ---