PDF 原檔：報告_OCP2026_Eaton_安全800VDC生態系_20261015_original.pdf
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### p<n>為頁碼；圖表內容見原檔。
圖片清單（已驗證 2026-10-19）
| 檔名 | 頁 | 分類 | 親眼所見內容 |
|---|---|---|---|
報告_OCP2026_Eaton_安全800VDC生態系_20261015_p2.png |
p2 | 真資料圖 | 800VDC 與 50V 級架構比較表：Telco −48V、PoE++、OCP 50V 機櫃匯流排、800VDC 的電壓、極性、接地與安全意涵；註明同功率下 800V 約為 50V 電流的 1/16 |
報告_OCP2026_Eaton_安全800VDC生態系_20261015_p5.png |
p5 | 真資料圖 | 800V DC 三種做法並列：Side Power Rack（鄰櫃 AC-DC、125A 專用迴路）、Power Center（1250A 輸出、架空匯流排、125A 分接）、MVSST（MVAC 直接轉 800VDC），附 Eaton 機櫃與 SST 實物照 |
報告_OCP2026_Eaton_安全800VDC生態系_20261015_p11.png |
p11 | 真資料圖 | 示意曲線（標示 Conceptual only）：機械式、混合式、固態斷路器的故障電流上升後被切斷的相對時序，固態最晚到峰值但最快衰減，機械最早切入 |
報告_OCP2026_Eaton_安全800VDC生態系_20261015_p16.png |
p16 | 真資料圖 | 三種 800VDC 接地方式示意：實接地、高阻接地（串電阻）、不接地浮接（IMD），各附取捨說明 |
原始內容
p1
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT Beyond Power Density Building a Safe 800V DC Ecosystem Joe Skorjanec | Eaton
p2
© 2026 Eaton. All rights reserved.. 50VDC and 800VDC solve different problems Higher voltage improves distribution efficiency and power density, but moves the system into a fundamentally different safety domain. Architecture Nominal voltage Polarity Ground / reference Primary benefit Safety implication Telco −48VDC −48V (typically −42 to −56V) Negative Ground-referenced Legacy telecom distribution Lower-voltage shock domain; architecture-specific grounding PoE++ / 802.3bt ~52–57V Floating Isolated Power + data on network cable Energy and power are intentionally limited by the system OCP 50V-class rack bus ~48–54V (up to ~60V class) Positive Floating or grounded by design High-current, short- distance rack distribution Familiar lower-shock-hazard design space, subject to full source classification 800VDC distribution ~800V Positive / return Defined by system grounding strategy Much lower current for the same power; efficient row-to-rack distribution Hazardous voltage: controlled access, insulation, interlocks, DC- rated interruption and verified isolation required For the same power 800V ≈ 1/16 the current of 50V ! 60VDC is a useful safety marker, not a complete safety verdict. At 800VDC, the ecosystem must actively prevent contact and rapidly control fault energy. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON
p3
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON 800VDC is hazardous, but it is not transmission HVDC Voltage class and hazard class answer different questions. Always state the actual voltage and governing standard. MI SCONCEPTION “800VDC = HVDC” FORMAL IEC-ORIENTED VIEW 800VDC remains inside the broad low-voltage DC system domain, whose upper boundary is 1,500VDC. IEC VOLTAGE CONTEXT + UL/IEC 62368-1 ENERGY CLASS ES1 ≤ 60VDC UL/IEC 62368-1 lower electrical-energy class* EXTRA-LOW VOLTAGE ≤ 120VDC IEC protective-measure boundary ABOVE LV
1.5kVDC High-voltage domain TRANSMISSION HVDC typically 100–800kV Bulk grid transmission technology 800VDC ! LOW VOLTAGE ≠ LOW HAZARD 800VDC still requires controlled access, insulation, interlocks, DC-rated interruption and safe isolation. *ES1 classification also depends on source-current and fault-condition limits, not voltage alone. Recommended terminology: “800VDC distribution” or “800VDC power architecture” 7 LOW VOLTAGE DC 120 to 1,500VDC Broad IEC system-voltage domain
p4
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON The transition is bigger than a voltage change Moving conversion out of the compute rack also moves the safety concerns into the white space. CONVERSION Where AC becomes DC DISTRIBUTION Where 800V travels PROTECTION Where faults clear SERVICE Where people interact OPERATIONS How recovery works Design the architecture and the safety system together. 4
p5
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Three approaches to 800V DC This session focuses on power racks (previously known as sidecars). MVSST is shown as part of the broader DC architecture evolution. SIDE POWER RACK • Adjacent AC-to-DC conversion • Dedicated 125A circuits • Point to point outputs • Contained in rack-to-rack envelope Rack to rack system POWER CENTER • Central or row-level conversion • High-current DC output (1250A) • Overhead busway distribution or RPP cable fed • Protected 125A tap-offs Row or Pod distributed infrastructure MVSST • Direct MVAC-to-800VDC conversion • Building or data-hall power block • Feeds DC switchboard / busway • Broader facility architecture Facility DC architecture PRESENTATION FOCUS: POWER RACK ARCHITECTURES Architecture determines the location of conversion, protection, isolation and service boundaries. 5
p6
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Approach 1: point-to-point Side Power Rack Short, dedicated 125A DC paths connect an adjacent power rack to DC-DC shelves in the compute rack. SYSTEM CHARACTERISTICS • AC-to-800VDC conversion adjacent to compute • One 125A output per protected circuit to one DC-DC power shelf in compute rack • Optional battery backup integrated in rack • Multiple paths support capacity and redundancy • Source protection close to cable origin ≈100 kW per 125A circuit at 800V 6
p7
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Side Power Rack: keep 800V DC inside a controlled envelope SIDE POWER RACK COMPUTE RACK CONTROLLED 800V DC SYSTEM ENVELOPE • Mechanical pass-through protects routing from external access • Door and panel block access and controls exposure • Protection device remains close to source • Connector interlock trips before separation • Isolation zone can be limited to one path Contained does not mean unregulated. It means the system boundary is explicit. 7
p8
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Approach 2: Power Center with overhead busway The DC distribution pathway becomes part of the white-space electrical infrastructure. DISTRIBUTION CHAIN Power shelves Touch-safe busbar DC PDU Overhead busway 125A tap-box to connector drop 800V-54VDC power shelf 8 Busbar distribution to compute
p9
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Power Center: three safety zones A selective protection strategy prevents a single branch fault from becoming a row-level event. SOURCE ZONE Power shelves Internal busbar Main DC PDU DISTRIBUTION ZONE Busway sections Joints and plug-in points Main isolation RACK BRANCH ZONE 125A tap-off protection Rack whip DC-DC shelf connector Design question: what can be isolated without de-energizing the entire row? 9
p10
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Different architecture, different risk concentration DESIGN DIMENSION SIDE POWER RACK POWER CENTER CIRCUIT LENGTH Short, dedicated Shared trunk + short branches SOURCE-LOAD RELATIONSHIP Known point-to-point Many loads on common distribution PROTECTION LOCATION At each rack output Main + coordinated tap-off protection ISOLATION ZONE Individual path / adjacent rack Branch, section, row or pod PRIMARY COMPLEXITY More cables and connectors More joints and coordination FAILURE CONTAINMENT Shelf or rack path Requires selective branch clearing 10
p11
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON DC fault behavior changes the protection discussion Fault current is shaped by the source, cable or busway impedance, local capacitance and clearing behavior. TIME CURRENT MECHANICAL HYBRID SOLID-STATE Conceptual only • No natural current zero crossing • Capacitors or battery may feed the fault after converter shutdown • Fast interruption can reduce incident energy • Device rating must match DC voltage and system time constant • Model available fault current and clearing time 11
p12
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Circuit protection needs four coordinated layers 1 DETECTION Overcurrent • dI/dt • insulation • residual current 2 FAST INTERRUPTION E-Fuse/Solid-state, hybrid or DC-rated mechanical device 3 PHYSICAL ISOLATION Air gap • disconnect • lockable state 4 BACKUP PROTECTION Fuse • upstream shutdown • coordinated selectivity One component does not need to perform every safety function. 12
p13
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON EPO is a system sequence, not just a red button 1 SIGNAL Emergency command received 2 STOP Block new converter energy 3 TRIP Open DC output protection 4 ISOLATE Disconnect BBU and backfeed 5 DISCHARGE Reduce stored energy 6 VERIFY Confirm safe voltage state Converter shutdown ≠ electrically safe work condition 13
p14
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Connector safety: prevent separation under load The interlock should initiate source-side isolation before the main power contacts separate. 1 LATCHED Mechanical retention 2 INTERLOCK OPENS Trip command to source 3 CURRENT CLEARS Protection interrupts 4 POWER SEPARATES Touch-safe state Not a disconnect under load device unless specifically designed and certified for that duty. 14
p15
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Grounding, bonding and fault monitoring Grounding determines fault behavior. Monitoring determines whether the first fault becomes a hazardous second fault. +800V RETURN LOAD IMD • Bond every exposed conductive enclosure • Define the DC reference: solid, resistance or impedance grounded, or unearthed • Use insulation monitoring for floating or impedance-referenced systems • Alarm and locate the first fault before a second occurs • Use residual-current monitoring where it improves branch fault location 15 IMD PE Point-to-point circuits may use branch-level fault detection and isolation instead of a dedicated IMD
p16
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Three leading 800VDC grounding strategies Each strategy changes first-fault current, detection method, touch potential and the required isolation response. SOLIDLY GROUNDED CLEAR REFERE NCE +800V RTN LOAD Direct bond • Return conductor intentionally bonded to PE • Ground fault can produce high current • Conventional current-based protection can trip quickly Tradeoff: higher first-fault current and immediate interruption expected HIGH-RESISTANCE GROUNDED CONTROLLED FAULT CURRENT +800V RTN LOAD R Sized resistor • Return or midpoint connected through a sized resistor • Limits first-ground-fault current • Requires resistor monitoring and coordinated detection Tradeoff: balances fault-current control with a defined ground reference UNGROUNDED / FLOATING MAY CONTINUE OPERA TING ON FIRS T FAULT +800V RTN LOAD IMD No intentional bond • No intentional connection from either pole to PE • First ground fault may not force immediate shutdown • IMD monitors insulation resistance to ground Tradeoff: insulation faults require monitoring and fault-location procedures There is no universal winner: grounding must be selected with protection zoning, fault detection, insulation coordination and operating procedures. 6
p17
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON Safe serviceability must be designed in Hot-swap capability, de-energized service and stored-energy control are different operating states. SAFE WORKFLOW Identify every AC and DC source Execute controlled shutdown Open and lock isolation points Wait for validated discharge Test for absence of voltage Service and restart under control Design enablers: lockable isolation • test points • discharge indication • clear one-line diagrams 17
p18
© 2026 Eaton. All rights reserved.. OCP GLOBAL SUMMIT | 800V DC SAFETY EATON FIVE PRINCIPLES FOR A SAFE 800V DC ECOSYSTEM 1 DEFINE THE BOUNDARY Know where 800V begins, travels, branches and ends. 2 LIMIT FAULT ENERGY Detect quickly, interrupt quickly and coordinate protection. 3 PREVENT ENERGIZED ACCESS Use touch-safe construction, enclosures and interlocks. 4 ISOLATE EVERY SOURCE Include converters, batteries, capacitors and backfeed. 5 DESIGN FOR THE TECHNICIAN Make isolation, verification and restart predictable. Safety will come from coordinating the complete ecosystem, not from one breaker, connector or standard. 18
p19
© 2026 Eaton. All rights reserved.. © 2024 Eaton. All rights reserved.. © 2023 Eaton. All rights reserved.. © 2024 Eaton. All rights reserved.. © 2026 Eaton. All rights reserved..