2025120 MW
Hyperscale AI Campus
Full 800 VDC protection layer across four data halls — facility bus to rack, with zone-selective interlocking.
800 VDC Power Protection Specialist
The protection layer for 800 VDC data centers
XCaliber engineers the solid-state protection architecture that makes 800 VDC power distribution safe at AI scale — from the facility bus down to the rack. Trusted by operators who cannot afford a single arc.
- Bus voltage
- 800 VDC
- Fault clearing
- <1 ms
- Protection sets
- 3×N
Live protection
Facility bus · zones · racks · 3× redundant
01 — Protection layer
A hierarchy that never lets a fault through
Every zone of the 800 VDC plant is covered by three independent protection sets. A trip fires only on agreement — so a single sensor failure can never drop a healthy hall.
Level 01Facility Bus
Facility Bus
Main 800 VDC bus · rectifier interface · energy storage tie
Level 02Distribution Zone
Distribution Zone
Busway sections · row feeds · zone-selective interlocking
Level 03Rack & Load
Rack & Load
Rack-level solid-state breakers · server PSU interface · inrush control
Triple-redundant protection
3 × independent sets
Sets A, B and C sample the same current and voltage but run on separate hardware and logic. A trip requires two-of-three agreement.
ASet A — primary logic, solid-state trip path
BSet B — backup logic, independent sensing
CSet C — diverse hardware, watchdog & record
2-of-3 vote → solid-state trip · 1-of-3 → alarm & record
02 — Capabilities
Full-stack DC protection, engineered end to end
C1
DC Fault Interruption
Solid-state breaking of 800 VDC faults in under a millisecond — no arc, no waiting for a zero crossing.
C2
Arc Detection & Mitigation
High-frequency signature analysis detects series and parallel arcs before they escalate.
C3
Selective Coordination
Zone-selective interlocking so only the faulted section trips — the rest of the hall stays live.
C4
Protection IED Integration
IEC 61850 and Modbus TCP integration into your EPMS and DCIM, with GOOSE-class messaging.
C5
Simulation & Validation
EMT-type simulation and hardware-in-the-loop testing of every scheme before energization.
C6
Commissioning & Support
On-site testing, protection coordination studies and 24/7 support through the life of the facility.
03 — Projects
03 / 03Facilities we keep safe
202540 MW
Colocation DC Retrofit
AC-to-800 VDC conversion of a live colocation facility. Solid-state breaker fleet deployed with zero downtime.
202418 MW
Edge GPU Cluster
Rack-level protection and arc mitigation for a high-density GPU deployment, validated hardware-in-the-loop.
04 — Process
From study to sign-off
01
System study
Fault-current and coordination study of the full 800 VDC distribution chain.
02
Scheme design
Protection philosophy, device selection and settings engineered to your topology.
03
Simulation
EMT-type and hardware-in-the-loop validation of every trip and interlock path.
04
Commissioning
On-site testing, coordination sign-off and handover to operations.
Engineered toIEC 60947UL 489BIEC 61850NFPA 70EOCP ReadyIEC 62477
05 — Contact
Ready to protect your 800 VDC build?
Send us your facility parameters and we will return a protection scope within five business days.
Trusted
Reliable
Innovative
Agile