≥1000KV Range

LQHCG 2400KV-400pF Triple-Stage Chopping Gap | Ultra-High Voltage Transformer Testing

2400kV triple-stage chopping gap system designed for 550kV power transformer testing, featuring 12×150mm sphere gaps, 10kV/100ns trigger, and sub-0.1μs chopping precision per IEC standards.

US$ 27,870.00
Lead time: 60 days

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Product Details

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LQHCG 2400KV-400pF Triple-Stage Chopping Gap System

Ultra-High Voltage Transformer Testing Solution

Engineered specifically for 550kV-class power transformer impulse testing, the LQHCG 2400KV-400pF delivers 1800kV+ chopping capability (per IEC 60060-1 requirements) with unmatched ≤0.1μs time deviation. Our triple-stage design ensures reliable operation at 80% of rated 2400kV capacity - the critical range for transformer validation.

Key Specifications

Electrical Parameters

Rated Voltage: 2400kV (peak)
Test Voltage: 1800kV (IEC 1675kV×1.1)
Stage Configuration: 3×800kV
Rated Capacitance: 400pF ±1%
Chopping Time Range: 2-6μs

Mechanical Design

Sphere Gaps: 12 pairs (4 per stage)
Gap Diameter: 150mm semi-sphere
Trigger Pulse: 10kV, 100ns rise time
Time-Delay Pulse: 250kV adjustable

Precision Metrics

Chopping Precision: σ<0.1μs
Time Deviation: <±0.2μs
Control System: Digital μs-setting
Sync Accuracy: <0.3% stage deviation

Transformer Testing Features

IEC-Compliant Voltage

Precisely meets 1.1×1675kV = 1842kV requirement for 550kV transformer tests with 30% safety margin

Optimized Chopping Point

80% voltage operation (1920kV) aligns perfectly with standard transformer test protocols

Multi-Stage Reliability

3-stage design maintains <0.5% voltage imbalance during extended test sequences

Technical Comparison

Capability	LQHCG 2400KV	Standard 2000KV Systems
Transformer Test Coverage	550kV class (IEC 1675kV×1.1)	500kV class max
Stage Count	3 stages	2 stages
Chopping Precision	σ<0.1μs	σ<0.3μs typical
Safety Margin	30% at 1800kV	10-15% typical

Standards Compliance

Certified for all relevant international standards:

IEC 60060-1:2022 High-voltage test techniques
IEEE Std C57.98-2021 Transformer testing
GB/T 16927.1-2022 Lightning impulse tests
EN 60076-3 Power transformer testing

Operational Protocol

Pre-Test Calibration: Verify all 12 sphere gaps within 0.05mm tolerance
Voltage Setting: Configure for 1842kV (550kV transformer test value)
Chopping Adjustment: Set digital control to desired 2-6μs window
Safety Check: Confirm 5m minimum clearance at 2400kV
Post-Test: Automatic discharge sequence engages after each impulse

Maintenance Schedule

Interval	Action	Tolerance
Every 20 operations	Sphere gap inspection	±0.1mm alignment
Quarterly	Trigger circuit test	10kV±5% output
Annual	Full system calibration	IEC 60060-3 Class I

Why This System?

The LQHCG 2400KV-400pF is the only chopping gap system specifically engineered for 550kV power transformer testing, offering true 1800kV+ capability with laboratory-grade ≤0.1μs precision. With 12 precisely matched sphere gaps and triple-stage voltage distribution, it delivers the reliability and accuracy needed for certification of next-generation UHV transmission equipment.