Damping Resistor

HGDR 750kV/5kΩ/0.5A SF6 Damping Resistor | Ultra-HV Energy Absorption

750kV-rated HGDR damping resistor handles 0.5A continuous current with ≤80K temperature rise. Features 5kΩ precision resistance and 20-minute short-circuit capability for HV testing.

US$ 7,706.00
Lead time: 30 days

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Product Details

Product Tags

HGDR 750kV/5kΩ/0.5A Gas Insulated Damping Resistor

Designed for ultra-high-voltage energy dissipation, the HGDR 750kV/5kΩ/0.5A combines 750kV dielectric strength with precision 5kΩ resistance in a compact SF6-insulated package. This industrial-grade resistor delivers reliable performance in impulse testing, HVDC research, and high-energy physics applications.

Technical Specifications

Parameter	Specification
Rated Voltage	750kV DC/AC peak
Nominal Resistance	5kΩ ±5%
Rated Current	0.5A continuous
Power Rating	1.875kW
Frequency	50Hz
Short-Circuit Duration	20 minutes at full rating
Temperature Rise	≤80K at 100% load
Insulation Medium	SF6 Gas (0.55MPa)

Key Features

1. Extreme Voltage Performance

750kV rating with 825kV withstand capability
SF6 gas insulation prevents corona discharge
Graded ring electrodes for uniform field distribution

2. Precision Energy Absorption

5kΩ ±5% tolerance for consistent measurements
Low thermal drift (<250ppm/°C)
1.875kW power dissipation capacity

3. Robust Thermal Management

≤80K temperature rise at full load
20-minute continuous operation at 0.5A
Stainless steel enclosure with forced convection

Construction Details

Resistive Element

Nickel-chromium alloy wire winding
Alumina ceramic core substrate
Electrostatic shielding layers

Gas System

0.55MPa SF6 gas pressure
Double-sealed maintenance-free design
Integrated pressure relief valve

Typical Applications

800kV+ transmission line testing
HVDC converter station commissioning
Pulsed power system development
High-voltage capacitor bank testing

Performance Advantages

High Energy Density: 2.25kJ pulse absorption per cycle
Controlled Heating: ≤80K rise ensures stable resistance
Safety Assurance: Pressure-activated disconnect
Long Service Life: 10+ years maintenance-free operation

Installation Guidelines

Electrical Requirements

750kV-rated silicone rubber bushings
Minimum 3m clearance to ground
Equalizing rings recommended above 500kV

Operational Protocol

Maximum 20-minute continuous operation
60-minute cooldown between cycles
Annual SF6 pressure checks required

Compliance Standards

IEC 60060-1 (High-voltage testing)
IEEE Std 4 (HV measurement techniques)
ANSI/NETA MTS-2021 (Maintenance testing)