LQHCG 1200KV-400pF Dual-Stage Chopping Gap System Introduction

The LQHCG 1200KV-400pF represents a cutting-edge solution for ultra-high voltage impulse testing, combining a two-stage architecture with large 200mm hemisphere electrodes and high-capacitance components for superior performance in demanding electrical testing applications.

Core Technical Specifications

Advanced Capacitor System

MWF400-800 Impulse Capacitors

The system utilizes high-performance MWF400-800 capacitors with:

• Individual rating of 800pF per capacitor

• 400-series designation for high-voltage applications

• Optimized for fast discharge characteristics

• Robust construction for repeated impulse testing

Enhanced Electrode System

200mm Hemisphere Gap Design

The large-diameter electrode system provides:

• Improved field distribution with 200mm hemispheres

• Enhanced stability at ultra-high voltages

• Reduced corona effects

• More consistent breakdown characteristics

Precision Triggering Mechanism

Three-Electrode Discharge Trigger

The advanced triggering system features:

• High-performance pulse amplifier output: 10kV, 100ns trigger pulse

• Precision timing control for accurate initiation

• Reliable operation at 1200kV

• Optimized for two-stage synchronization

Time-Delay Control System

The electronic timing system offers:

• Adjustable time-delay range: 2-5μs

• 250kV trigger pulse output

• Digital control system integration

• Precise chopping time programming

Two-Stage Architecture Benefits

The dual-stage design provides significant advantages:

• Balanced voltage distribution across stages

• 4 pairs of sphere gaps per stage for optimal control

• Improved waveform shaping capabilities

• Reduced stress on individual components

Performance Characteristics

Key performance metrics include:

• 1200kV maximum test voltage capability

• 400pF system capacitance for various test scenarios

• Large 200mm electrodes for stable operation

• Precision timing control with adjustable delay

Typical Applications

This ultra-high-voltage system is designed for:

• EHV transformer impulse testing

• Gas-insulated switchgear (GIS) testing

• High-voltage cable research

• Lightning impulse waveform studies

• Advanced dielectric material evaluation

Installation Requirements

Special considerations for this system:

• Large test area with minimum clearance distances

• Proper foundation for heavy equipment

• High-voltage safety barriers and warning systems

• Climate-controlled environment for optimal performance

Safety Features

The design incorporates multiple protection mechanisms:

• Properly rated insulation for 1200kV operation

• Secure mechanical construction

• Grounding systems for all components

• Emergency discharge capabilities

Technical Comparison

Advancements over previous models:

• Larger 200mm electrodes (vs 150mm)

• Higher individual capacitor rating (800pF)

• Maintained 1200kV rating with enhanced stability

• Same reliable three-electrode triggering

Conclusion

The LQHCG 1200KV-400pF Two-Stage Chopping Gap System with 200mm hemisphere electrodes represents a significant advancement in ultra-high voltage testing technology. Combining robust MWF400-800 capacitors, an advanced two-stage architecture, and large-diameter electrodes, this system delivers unparalleled performance for the most demanding impulse testing applications. The precision triggering and timing control, coupled with the enhanced 200mm hemisphere gap design, make this equipment ideal for research institutions and testing laboratories working at the highest voltage levels.