HGDR 300kV/5kΩ/0.5A Gas Insulated Damping Resistor

Engineered for extreme high-voltage applications, the HGDR 300kV series provides reliable 5kΩ resistance in a compact SF6 gas-insulated package. With its 300kV rating and robust short-term overload capacity, this damping resistor is ideal for impulse testing, energy absorption, and voltage stabilization in demanding electrical environments.

Technical Specifications

Key Features

1. High Voltage Endurance

• 300kV rated voltage with 350kV withstand

• 20-minute continuous operation at 0.5A

• Non-inductive wound element design

2. Precision Resistance

• 5kΩ ±5% tolerance

• Low temperature drift (<200ppm/°C)

• Stable performance under pulse loads

3. Maintenance-Free Design

• Hermetic SF6 gas sealing (0.5MPa)

• Stainless steel pressure vessel

• Corrosion-resistant electrodes

Construction Details

Resistive Element

• Special alloy wire wound on ceramic core

• Precision-matched resistance groups

• Electrostatic field grading rings

Enclosure System

• 304 stainless steel housing

• Double-port SF6 filling valves

• Integrated pressure gauge

Typical Applications

• Impulse voltage generator loads

• DC high voltage testing circuits

• Power transformer test systems

• Surge arrester energy absorption

Performance Advantages

1. Reliable Protection: Prevents voltage overshoot in test circuits

2. Energy Handling: 150kWs pulse absorption capacity

3. Safety Assurance: SF6 insulation prevents arcing

4. Measurement Accuracy: Minimal interference with test signals

Installation Requirements

Electrical Connections

• Use 300kV-rated silicone rubber bushings

• Minimum 2m clearance to grounded objects

Operational Limits

• Maximum 20 minutes continuous operation at 0.5A

• Allow 60-minute cooldown after full-load use

• Ambient temperature range: -30°C to +50°C

Compliance Standards

• IEC 60060-1 (High-voltage test techniques)

• IEEE Std 4 (Standard for HV testing)

• EN 62271-203 (Gas-insulated equipment)