HGDR 750kV/5kΩ/0.4A Gas Insulated Damping Resistor

Engineered for **ultra-high-voltage (UHV) applications**, the **HGDR 750kV/5kΩ/0.4A** damping resistor delivers **precision energy absorption** with **≤5pC partial discharge** at full load. Its **SF6 gas-insulated design** ensures stable performance in **750kV test systems**, making it ideal for **impulse testing, HVDC research, and high-energy physics experiments**.

Technical Specifications

Key Features

1. Ultra-High Voltage Stability

• 750kV rated voltage with 825kV withstand capability

• ≤5pC partial discharge ensures measurement accuracy

• SF6 gas insulation prevents corona discharge

2. Precision Energy Absorption

• 5kΩ ±5% tolerance for consistent performance

• Low thermal drift (<200ppm/°C)

• 0.8kW power dissipation with controlled temperature rise (≤80K)

3. Robust & Maintenance-Free

• 20-minute short-circuit capability at full load

• Stainless steel enclosure with double O-ring seals

• No required servicing for 10+ years

Design & Construction

Resistive Element

• Special alloy wire (NiCr) for high stability

• Ceramic core with high thermal conductivity

• Graded potential rings for uniform field distribution

Cooling & Safety

• SF6 gas convection cooling (0.5MPa)

• Pressure relief valve for overload protection

• Integrated temperature sensors for real-time monitoring

Typical Applications

• UHV transmission testing (800kV+ systems)

• HVDC converter station commissioning

• Pulsed power research (lasers, accelerators)

• High-voltage capacitor discharge circuits

Performance Advantages

1. Ultra-Low PD (≤5pC) for noise-free measurements

2. Controlled Temperature Rise (≤80K) for extended duty cycles

3. High Reliability (20-minute short-circuit rating)

4. No Maintenance (sealed SF6 design)

Installation & Usage

Electrical Requirements

• Use 750kV-rated bushings (silicone rubber recommended)

• Minimum 3m clearance to grounded objects

Operational Limits

• 20-minute max operation at 0.4A

• 60-minute cooldown required between cycles

• Ambient temperature: -20°C to +50°C

Compliance Standards

• IEC 60060-1 (High-voltage testing)

• IEEE Std 4 (HV measurement)

• EN 62271-203 (SF6-insulated equipment)