<1000kV Range

LQHID 400KV/400pF Capacitor Divider - Ultra High-Voltage Impulse Measurement

400kV/400pF weak damping capacitor divider with corona protection. Features ≤100ns response, ≤20% overshoot, GB311 compliance, and mobile base.

US$ 4,711.00
Lead time: 30 days

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Product Details

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LQHID 400KV/400pF Weak Damping Capacitor Voltage Divider

Engineered for ultra-high-voltage testing applications, the LQHID 400KV/400pF Capacitor Divider delivers precision measurements up to 400kV. Featuring advanced corona prevention, distributed damping technology, and a mobile industrial base, this solution is essential for power transmission testing and high-voltage research.

Technical Specifications

Parameter	Specification
Rated Voltage	+400kV
Configuration	Single-stage multistage capacitors
Standard Lightning Wave	+400kV impulse withstand
Rated Capacitance	400pF ±5%
Partial Response Time (T_α)	≤100 nanoseconds
Overshoot (β)	≤20%
Scale Factor Uncertainty (K_s)	≤±1%
Voltage Ratio	1000:1
Standards Compliance	GB311 (square wave response)
Dimensions	Custom high-strength mobile base
Top Electrode Material	Stainless steel tube

Advanced Design Features

Multistage Capacitor System

Series-connected pulse capacitors with distributed damping resistors eliminate inductance for accurate high-frequency response at 400kV.

Corona Prevention Technology

Optimized corona cover prevents discharge during 400kV+ switching impulses
Stainless steel top electrode minimizes abnormal flashover
Cross-profile design for positive impulse wave stability

Industrial Mobile Base

High-strength movable platform with fixed braces
Polyurethane wheels (2500kg load capacity)
Field-installable top electrode for transportation

Performance Specifications

Characteristic	Performance
Low-Voltage Arm	Parallel non-inductive capacitors
Frequency Response	DC to 10MHz
Dielectric Strength	600kV (150% overvoltage withstand)
Impulse Polarity	Positive (+400kV)

Standards Compliance

Full GB311 square wave response compliance (0-9.9μS)
Compatible with IEC 60060-1 impulse test standards
Designed for IEEE 4 switching surge measurements

Industrial Applications

Ultra-HV Transmission: 400kV lightning impulse tests on transformers
Substation Testing: GIS circuit breaker switching surge analysis
Power Research: HVDC converter station transient studies
Generator Validation: Insulation testing for turbine generators

Mechanical Construction

Base material: Reinforced carbon steel (2mm thickness)
Electrode: Field-installable 304 stainless steel tube
Wheel system: 180mm polyurethane with dual braking
Corona cover: Optimized for 400kV positive impulses

Operational Safety

4-meter minimum clearance at 400kV operation
Automatic grounding system for capacitor banks
EMI-shielded low-voltage connections
Corona discharge < 10pC at 350kV

Calibration & Maintenance

Factory calibration certificate included
Annual dielectric verification at 500kV AC
Biannual damping resistor network inspection
5-year full system recertification cycle

Technical Advantages

Feature	Benefit
400pF Capacitance	Enhanced signal-to-noise ratio
Distributed Damping	Minimal waveform distortion
Field-Installable Electrode	Easier transportation and setup
Corona Control	Reliable measurements at 400kV