HDVR-800kV/100mA Ultra-HVDC Protection Resistor

Product Overview

Designed for extreme voltage applications, the HDVR-800kV/100mA resistor provides essential protection for ultra-HVDC test systems operating at up to 800kV DC, featuring a 100kΩ current-limiting design with <5% annual drift.

Technical Specifications

Protection System Architecture

Dual-Resistor Network

• AC Side Protection: 10kΩ transformer output resistor

• DC Side Protection: 100kΩ main limiting resistor

• Adjustable mounting with positive-lock mechanism

Failure Protection Mechanism

Unprotected System Risks

1. Fault currents exceed 100A during short-circuit

2. Rectifier stacks (D1-D4) destroyed in microseconds

3. Transformer insulation failure occurs

4. Cascading system damage

HDVR Protection Benefits

1. Peak current limited to <120mA

2. Voltage transients limited to <108%

3. Fault energy contained to single module

4. System components remain protected

Design Features

• Voltage Grading: 7-stage capacitive grading system

• Thermal Management: Oil-immersed cooling option

• Mechanical: 3.2m epoxy-fiberglass core with corona shields

• Monitoring: Integrated voltage divider taps

Protection Performance

Installation Requirements

1. Minimum 5m clearance from grounded surfaces

2. Vertical mounting required (max 5° deviation)

3. Annual resistance verification (±5% tolerance)

4. Pre-commissioning hi-pot test at 960kV

5. Corona inspection at 500kV AC

Compliance Standards

• IEC 62271-1 (Ultra-high voltage standards)

• IEEE Std 1313.2 (Extreme voltage design)

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

• ASTM D2304 (Epoxy material standards)

Typical Applications

• Ultra-HVDC transmission research

• Particle accelerator power systems

• 800kV+ capacitor bank testing

• High-energy physics experiments

• Next-gen rectifier protection

The HDVR-800kV/100mA resistor is engineered for the most demanding ultra-high voltage applications, where conventional protection methods fail. Its 100kΩ value and 10kW power rating make it ideal for protecting systems testing capacitive loads up to 25nF at 800kV.