Product Overview

The LQHSG250 horizontal sphere gap system provides laboratory-grade high voltage measurement with 250mm diameter polished copper spheres. Designed for measurements up to 275kV, this IEC 60052-compliant instrument delivers ±3% accuracy for impulse, AC, and DC voltage calibration.

Technical Specifications

Key Features

Precision Engineering

• Mirror-polished 250mm copper spheres (Ra ≤ 0.2μm)

• Precision ground stainless steel adjustment mechanism

• 0.5mm resolution gap setting scale

Versatile Measurement Capabilities

• Simultaneous measurement of:

• Lightning impulse (1.2/50μs)

• AC peak voltages

• DC voltages

• Optional chopping device for impulse wave termination

Safety & Compliance

• Full compliance with IEC 60052 standards

• Insulating columns rated for 300kV BIL

• Interlocked safety system (optional)

Optional Chopping Device

The system can be equipped with a precision wave-chopping attachment:

Note: For chopping operation, one measuring sphere must be replaced with the trigger sphere.

Installation Requirements

• Space Requirements: Minimum 4m × 3m laboratory space recommended

• Environmental Conditions: Temperature 15-25°C, humidity ≤60% RH

• Foundation: Level concrete floor or vibration-isolated platform

• Safety Clearances: Maintain minimum 2m clearance to walls/objects

Typical Applications

1. Calibration of HV dividers and measuring systems

2. Research and development in high voltage engineering

3. Quality assurance testing of power equipment

4. Educational demonstrations in university HV labs

5. Verification of impulse generator outputs

Maintenance & Calibration

• Quarterly sphere surface inspection and cleaning

• Annual verification of gap adjustment accuracy

• 3-year recalibration recommended

• Use only approved cleaning solvents (isopropyl alcohol)