<1000KV Range

LQHCG 300KV-400pF Multiple Chopping Gap: High Precision High Voltage Testing Solution

Complete technical specifications and operational details for the LQHCG 300KV-400pF Multiple Chopping Gap, featuring 300kV rating, 400pF capacitance, and sub-microsecond timing accuracy for high voltage testing applications.

US$ 5,681.00
Lead time: 45 days

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Product Details

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LQHCG 300KV-400pF Multiple Chopping Gap: High Precision High Voltage Testing Solution

Product Overview

The LQHCG 300KV-400pF Multiple Chopping Gap is a precision high voltage testing instrument designed for generating controlled chopped waves in high voltage impulse tests. With its 300kV voltage rating and 400pF capacitance, this device provides reliable performance for demanding high voltage testing applications in both industrial and research environments.

Key Features

300kV maximum operating voltage
400pF rated capacitance
Precision timing control (σ<0.1μs)
Four-pair sphere gap configuration
Advanced three-electrode triggering

Detailed Technical Specifications

Core Electrical Parameters
Parameter	Specification
Rated Voltage	300kV DC/Impulse
Rated Capacitance	400pF ±5%
System Configuration	1 stage design
Timing Accuracy	Standard deviation <0.1μs

Mechanical Configuration

Sphere Gap Quantity: 4 pairs (8 units total)
Gap Type: 150mm diameter semi-sphere gap
Electrode Material: High-conductivity alloy with polished surface
Support Structure: Porcelain or composite insulators

Trigger System Specifications

Trigger Method: Three-electrode discharge trigger
Pulse Amplifier Output: 10kV, 100ns rise time
Time-delay Control: Adjustable digital circuit
Trigger Pulse: 250kV with <5ns jitter
Control Interface: Digital setting of chopping time

Performance Characteristics

Electrical Performance

Voltage withstand: 350kV power frequency, 450kV impulse
Leakage current: <1mA at rated voltage
Partial discharge: <10pC at 300kV
Temperature coefficient: ±0.01%/°C

Timing Performance

Chopping time range: 0.5-20μs (adjustable)
Time-delay resolution: 10ns
Wavefront time: 1.2μs ±20%
Wavetail time: 50μs ±20%

Environmental Specifications

Operating temperature: 0°C to +45°C
Storage temperature: -20°C to +60°C
Relative humidity: <85% non-condensing
Altitude: <2000m (with derating above)

Primary Applications

Transformer Testing

Lightning impulse tests per IEC 60076-3
Chopped wave withstand testing
Insulation coordination studies

High Voltage Equipment Testing

Circuit breaker impulse withstand
Busbar insulation tests
Disconnector switching tests

Research & Development

Dielectric material research
Breakdown phenomena studies
High voltage component development

Operation and Maintenance

Installation Requirements

Minimum clearances: 3m per 100kV
Foundation: Level within ±2mm/m
Grounding: <0.5Ω resistance
Environmental: Clean, dry installation area

Maintenance Schedule

Daily: Visual inspection of electrodes
Monthly: Cleaning of sphere surfaces
Quarterly: Trigger system check
Annual: Comprehensive calibration

Safety Precautions

Always discharge capacitors before servicing
Use HV-rated personal protective equipment
Implement lockout/tagout procedures
Maintain safe working distances

Technical Advantages

Enhanced Precision

The LQHCG 300KV-400pF achieves unprecedented timing accuracy with standard deviation of chopping time less than 0.1μs, meeting the most stringent testing requirements.

Improved Reliability

The four-pair sphere gap configuration ensures consistent performance even under repeated operations, with minimal electrode erosion.

Advanced Control

Digital time-delay control with 10ns resolution allows precise adjustment of chopping time from 0.5μs to 20μs, adaptable to various test requirements.

Conclusion

The LQHCG 300KV-400pF Multiple Chopping Gap represents a significant advancement in high voltage testing technology, combining 300kV rating with 400pF capacitance and sub-microsecond timing accuracy. Its four-pair sphere gap configuration and advanced three-electrode triggering system provide reliable, repeatable performance for transformer testing, high voltage equipment evaluation, and research applications. With proper installation and maintenance, this equipment delivers precise, consistent results that meet international testing standards while ensuring operator safety.

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<1000KV Range