HDVR-1000kV/10mA Ultra-HVDC Protection Resistor

Product Overview

Engineered for extreme voltage applications, the HDVR-1000kV protection resistor safeguards 1MV DC test systems against catastrophic failures during load faults or component breakdowns, with an 80kΩ current-limiting design.

Technical Specifications

Protection System Architecture

Multi-Stage Protection

• AC Side: 10kΩ resistor at transformer output

• DC Side: 80kΩ main protection resistor

• Position-adjustable with positive locking mechanism

Failure Protection Mechanism

Unprotected System

1. Fault current exceeds 50A during short-circuit

2. Rectifiers (D1-D4) experience thermal runaway

3. Transformer insulation breakdown occurs

With HDVR Protection

1. Peak current limited to <12mA

2. Voltage transients capped at 105%

3. Fault energy contained to single module

Design Features

• Voltage Grading: 8-stage capacitive grading rings

• Thermal Capacity: 500J fault energy absorption

• Mechanical Design: 3m epoxy-fiberglass core with corona shields

• Environmental: IP55 rated for outdoor installation

System Protection Parameters

Installation Requirements

1. Minimum 6m clearance from grounded surfaces

2. Horizontal mounting preferred (max 15° tilt)

3. Annual resistance verification (±5% tolerance)

4. Pre-commissioning hi-pot test at 1200kV

5. Corona inspection at 650kV AC

Compliance Standards

• IEC 62271-1 (1000kV+ equipment)

• IEEE Std 1313.2 (Extreme voltage design)

• EN 60060-1 (HV testing standards)

• ASTM B344 (Nichrome wire specifications)

The HDVR-1000kV resistor is critical for UHVDC test systems above 800kV, where traditional protection methods become ineffective. Its 80kΩ value is optimized for multi-stage rectifier systems testing large capacitive loads up to 20nF.