Sphere Gap
LQHSG500 500mm Vertical Sphere Gaps for Ultra-High Voltage Testing
Product Overview
The LQHSG500 vertical sphere gap system represents the pinnacle of high voltage measurement technology, featuring 500mm precision copper spheres for measurements up to 515kV. This IEC 60052-compliant instrument provides direct voltage measurement with ±3% accuracy for the most demanding laboratory and industrial applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Sphere Diameter | 500mm (±0.1mm tolerance) |
| Maximum Voltage (1.2/50μs impulse) | 515kV at 250mm spacing (0.5×D) |
| System Height | 3.4m (adjustable) |
| Base Footprint | 2.3m × 1.0m |
| Total Weight | 350kg (net) |
| Gap Adjustment Resolution | ±0.5mm precision scale |
| Measurement Accuracy | ±3% (IEC 60052 Standard) |
Key Features
Precision Voltage Measurement
500mm oxygen-free copper spheres (surface roughness ≤0.1μm)
Vertical configuration minimizes horizontal space requirements
Micro-meter precision gap adjustment (0.5mm resolution)
High Voltage Performance
515kV rating for lightning impulse (1.2/50μs waveform)
Simultaneous measurement capability for:
Impulse voltages
AC peak voltages
DC voltages
Safety & Compliance
Full compliance with IEC 60052 standards
Insulating columns rated for 550kV BIL
Integrated safety interlock system (optional)
Designed for controlled indoor environments
Optional Chopping Device
Precision impulse wave termination system includes:
| Component | Specification |
|---|---|
| Trigger Method | Electronic ignition with programmable delay |
| Delay Range | 1μs - 5μs (8 discrete steps) |
| Timing Accuracy | ±0.1ms maximum dispersion |
| Power Requirements | 230V AC, 50/60Hz |
| Trigger Sphere | Includes integrated ignition rod |
Note: Chopping operation requires replacement of one measurement sphere with the trigger sphere.
Installation Requirements
Laboratory Space: Minimum 5m × 4m with 4m ceiling height
Environmental Conditions: 20°C ±5°C, ≤50% RH recommended
Foundation: Vibration-isolated concrete pad (minimum 300mm thickness)
Safety Clearances: 3m minimum from walls and other equipment
Typical Applications
Calibration of ultra-high voltage measurement systems
Research in high voltage dielectric breakdown
Testing of power transformers and bushings
Verification of impulse generator waveforms
High voltage education and training
Maintenance Protocol
Daily: Visual inspection of sphere surfaces
Monthly: Mechanical adjustment verification
Annual: Complete system recalibration
3-Year: Full metrological recertification
Recommended cleaning procedure: Use lint-free cloth with isopropyl alcohol (99% purity) for sphere surface maintenance.
Why Choose Vertical Configuration?
Space Efficiency: Reduced floor space requirements compared to horizontal systems
Improved Safety: Natural vertical discharge path reduces risk of side flashes
Easier Maintenance: Simplified access to adjustment mechanisms
Better Accuracy: Reduced influence of ground plane effects
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