1. Electrical Ratings
   • DC system voltage span: 80 kV – 800 kV DC
   • Rated breaking current: 25 kA (peak) cleared within < 3 ms
   • Control power: 110/220 V DC ±20 % or 24 V DC ±10 % depending on sub-module
   • Communication: IEC 61850-9-2LE over fiber optic, Profibus-DP, Modbus-TCP/RTU, CANopen
2. Functional Architecture
   • 3BHE055094R0002 – Master Control Unit
     – Dual-redundant DSP + FPGA real-time core
     – Executes DCC800 protection algorithms: di/dt, dv/dt, differential current, back-up over-current (SIL3)
     – Cycle time < 10 µs, fiber-optic latency < 1 µs to pole control
   • 3BHE031197R0001 – Gate Driver
     – ±15 V, 200 A pulse capability for IGBT/IGCT valve triggering
     – Propagation delay < 50 µs, jitter < 5 µs
     – Salt-fog corrosion class ISO 12944 C5-M for offshore wind
   • 3BHB030310R0001 – Sensor Interface
     – 1 MHz sampling, 16-bit resolution, Rogowski coil input
     – ±50 kV/µs common-mode rejection, fibre-isolated outputs
     – Built-in self-test and calibration routines
3. Protection & Performance Highlights
   • Hybrid breaker topology: mechanical contact for conduction loss < 0.1 %, solid-state stack for interruption
   • Fault detection latency: 2 ms from over-current onset to trip command
   • Grid support: LVRT, HVRT, zero-voltage ride-through per IEC 61400-21 & IEEE 1547-2018
   • Hot-swap modules; MTBF > 150 000 h per IEC 61709
4. Mechanical & Environmental
   • Enclosure protection: IP54 (standard), IP65 offshore variant
   • Operating temperature: –40 °C … +70 °C
   • Storage temperature: –50 °C … +85 °C
   • Vibration & shock: IEC 60721-3-3 class 3M6, seismic IEEE 693-2005 high level
   • Weight per complete breaker bay: ≈ 600 kg; sub-modules 0.8 – 3 kg depending on function
5. Application Scenarios
   • HVDC transmission: VSC-HVDC and LCC-HVDC schemes as primary DC protection breaker
   • Offshore & onshore wind: turbine nacelle or tower-base grid connection up to 15 MW per unit
   • Grid-scale battery storage: PCS6000 inverter bays performing charge/discharge control and fault isolation
   • Industrial microgrids: seamless islanding, black-start, and frequency regulation
   • Retrofit of existing medium-voltage drives and synchronous condensers for enhanced grid-code compliance
6. Certification & Standards
   • IEC 62271-307 HVDC circuit-breaker standard
   • IEC 61850-9-2LE sampled values & GOOSE messaging
   • CE, UL 1741-SA, DNV-GL offshore type approval
7. Service & Lifecycle
   • ABB Ability™ remote monitoring: breaker wear, contact erosion, capacitor health
   • 24/7 global technical support, on-site commissioning, 48-hour spare-part delivery
   • Design lifetime > 20 years with scheduled maintenance intervals every 5 years

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