<1000KV Range

LQHCG 300KV-300pF Multiple Chopping Gap Technical Specifications and High Voltage Testing Applications

Complete technical specifications and operational details of the LQHCG 300KV-300pF Multiple Chopping Gap device for precision high voltage impulse testing applications, including transformer and cable testing.

US$ 5,475.00
Lead time: 45 days

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LQHCG 300KV-300pF Multiple Chopping Gap Technical Specifications and High Voltage Testing Applications

Product Introduction

The LQHCG 300KV-300pF Multiple Chopping Gap is an advanced high voltage testing device designed for generating precise chopped lightning impulses in high voltage laboratories. With its 300kV rating and sophisticated timing control system, this equipment meets the stringent requirements of modern high voltage testing standards.

Key Advantages

High precision chopping time control (±0.1μs)
Wide adjustable range (0-9.9μs)
Reliable three-electrode triggering system
Consistent performance across multiple operations

Detailed Technical Specifications

Parameter	Specification
Rated Voltage	300kV
Rated Capacitance	300pF
Standard Chopping Time Range	2-6μs
Chopping Time Deviation	<±0.1μs
Adjustable Time Range	0-9.9μs (digital control)

Mechanical Configuration

Sphere Gap Quantity: 2 pairs (4 units total)
Gap Type: 150mm diameter semi-sphere gap
Electrode Material: High-grade copper alloy with oxidation-resistant coating
Support Structure: Insulated columns with creepage distance optimized for 300kV operation

Trigger System

Trigger Method: Three-electrode discharge trigger
Pulse Characteristics: 250kV, fast-rise trigger pulse
Timing Control: Digital time-delay circuit with 10ns resolution
Synchronization: <5ns jitter between channels

Performance Characteristics

Chopped Wave Consistency

Standard deviation of chopping time <0.1μs
Wavefront time: 1.2μs ±30% (adjustable)
Wave tail time: 50μs ±20% (adjustable)
Chopping voltage ratio: 10%-90% adjustable

Environmental Specifications

Operating temperature: -10°C to +40°C
Relative humidity: <80% non-condensing
Altitude: <1000m (derating required above)
Pollution degree: II (per IEC 60815)

Electrical Safety

Insulation level: 350kV power frequency withstand voltage
Impulse withstand: 450kV lightning impulse
Grounding resistance: <0.5Ω required
Partial discharge: <10pC at 300kV

Typical Applications

Transformer Impulse Testing

Full wave and chopped wave testing per IEC 60076-3
Insulation coordination studies
Turn-to-turn insulation verification

High Voltage Cable Testing

Impulse withstand voltage testing
Partial discharge inception measurement
Dielectric strength evaluation

Surge Arrester Testing

Protection characteristic verification
Chopped wave withstand capability
Energy absorption tests

Research & Development

Dielectric material research
Breakdown phenomena studies
High voltage component development

Operation and Maintenance Guidelines

Pre-Test Checklist

Verify all grounding connections
Inspect sphere gap surfaces for contamination
Check trigger circuit connections
Confirm control system communication
Perform low-voltage functional test

Calibration Procedures

Annual timing calibration using reference pulser
Quarterly sphere gap verification
Trigger voltage measurement every 6 months
Complete system check before major test series

Safety Protocols

Mandatory discharge of capacitors before access
Minimum safe distance: 3m per 100kV
Required PPE: HV-rated gloves, face shield, and insulating mat
Two-person rule for all HV operations

Performance Comparison

The LQHCG 300KV-300pF offers significant improvements over previous generation chopping gap systems:

Feature	LQHCG 300KV-300pF	Conventional Systems
Timing Accuracy	±0.1μs	±0.5μs
Adjustment Range	0-9.9μs	Fixed or limited range
Trigger Reliability	99.9%	95-98%
Voltage Withstand	350kV AC/450kV Impulse	300kV AC/400kV Impulse

Conclusion

The LQHCG 300KV-300pF Multiple Chopping Gap represents the state-of-the-art in high voltage impulse testing technology. With its precise timing control (±0.1μs), wide adjustment range (0-9.9μs), and reliable three-electrode triggering system, this equipment meets the demanding requirements of modern high voltage laboratories. The device's robust construction and advanced control features make it particularly suitable for transformer impulse testing, cable evaluation, and surge arrester verification according to international standards. When operated according to manufacturer guidelines and with proper safety measures, the LQHCG 300KV-300pF delivers consistent, accurate results for critical high voltage testing applications.

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<1000KV Range