LQHVF 1600kV/1500pF Quad-Stage Capacitive Voltage Divider

Engineered for the most demanding ultra-high-voltage applications, this four-stage capacitive divider delivers precision measurements at 1600kV with industry-leading ≤0.2% dielectric loss. Featuring modular 400kV units and ONAN cooling, it sets new standards for 50Hz grid reliability.

Voltage Specifications

• Rated System Voltage: 1600kV

• Stage Voltage: 400kV per unit

• Insulation Test: 1760kV (110%) for 1min

• Stage Test: 400kV/1min per unit

Capacitance Parameters

• Total Capacitance: 1500pF

• Per Stage: 6000pF ±2.5%

• Capacitance Deviation: ≤±2.5%

• Frequency Response: 45-55Hz optimized

Performance Metrics

• Dividing Ratio: 4000:1

• Accuracy: ≤±1%

• Dielectric Loss: <0.2%

• Cooling System: ONAN (Oil-Natural Air-Natural)

Quad-Stage Configuration

[Visual: Four 400kV units stacked vertically]

Height: 7500mm
           Base Diameter: Ø2200mm
           Top Diameter: Ø300mm

Modular Stage Technology

• Scalable Architecture:

• 1-stage: 400kV operation

• 2-stage: 800kV operation

• 4-stage: 1600kV operation

• Balanced Voltage Distribution: Precision impedance matching across all stages

• Field-Replaceable Units: Individual stage maintenance without full disassembly

• Interstage Connectors: Corona-free interfaces rated for 500kV

Engineering Innovations

• Advanced ONAN Cooling:

• Four-stage radiator system

• Maintains oil temperature <65°C at 1600kV

• Natural convection operation (no pumps)

• Structural Design:

• Total weight: <1480kg

• Height: 7500mm with integrated corona rings

• Removable pedestal with seismic stabilizers

• Measurement System:

• HV corona-free connections

• Special shielded lead-wire to variable frequency sources

• Scalable for single/dual-stage measurements

• Corona Control:

• Aerospace-grade aluminum alloy rings

• Zero detectable corona above 350kV/stage

• Transport-optimized design

Technical Specifications

Compliance & Certifications

• IEC 61869-11:2018 (Instrument Transformers)

• IEC 60137:2017 (Bushings)

• IEEE 4-2021 (High-Voltage Testing)

• ANSI/NETA ATS-2017

• CEI/IEC 61000-4-29 (EMC)

• ISO 9001:2015 Manufacturing

Industrial Applications

• Ultra-HV Transmission: 800kV+ AC grid monitoring

• HVDC Converter Stations: Valve tower voltage measurement

• Power Transformer Testing: Induced voltage withstand tests

• Research Facilities: Nuclear accelerator power systems

• Renewable Integration: Offshore wind HVDC export cables

Installation & Maintenance

• Foundation Requirements: Minimum 3m² reinforced base

• Safety Clearance: ≥8m phase-to-ground

• Commissioning: Stage-by-stage dielectric verification

• Calibration: Biannual traceability to national labs

• Transport: Ship stages horizontally in custom crates

Technical Advantage: The quad-stage design reduces electric field stress by 75% compared to single-unit dividers, while the optimized 1500pF capacitance provides 50% faster response time for 50Hz transient measurements in ultra-high-voltage networks.