Technical Specifications

• Rated Voltage: 300kV AC (50/60Hz)

• Nominal Resistance: 5kΩ ±3%

• Rated Current: 0.2A continuous

• Power Rating: 0.2kW continuous

• Partial Discharge (PD):

• <5pC at 300kV (100% rated voltage)

• <3pC at 240kV (80% rated voltage)

• Operating Duration: 60 minutes at 300kV/0.2A continuous load

• Temperature Rise: <80K on resistor surface at full load

• Dimensions: 250mm (W) × 450mm (D) × 1600mm (H)

• Weight: <60kg

• Termination: Corona-free HV bushings with silicone insulation

Key Performance Features

• Compact Footprint: Space-efficient vertical design (1.6m height)

• Ultra-Low PD: Triple-shielded construction for sensitive environments

• Thermal Efficiency: Advanced heat dissipation maintains

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• High Dielectric Strength: 350kV withstand voltage for 1 minute

• Lightweight Construction: Aircraft-grade aluminum core with composite housing

Application Matrix

Installation Specifications

• Mounting: Vertical installation on insulated base

• Clearances:

• 1.2m phase-to-phase minimum

• 1.8m to grounded structures

• Environmental Rating: IP55 (suitable for indoor/outdoor use)

• Operating Temperature: -30°C to +55°C

• Altitude: Full rating up to 2000m ASL

Space-Saving Advantage: The LQHDR-300/5K's compact dimensions (H1600mm) require 40% less installation space than conventional 300kV resistors while maintaining full performance.

Thermal Management System

• Passive Cooling: Natural convection design eliminates need for fans

• Heat Path: Radial aluminum fins with black anodized coating

• Temperature Monitoring: Integrated PT100 sensors (optional)

• Safety Margin: Automatic derating above 40°C ambient

Compliance & Standards

• IEC 60270:2015 Partial Discharge Measurements

• IEC 60060-1:2010 High-voltage test techniques

• IEC 60505:2021 Thermal performance evaluation

• IEC 61010-1:2010 Safety requirements (CAT IV 300V)

• RoHS 3 (EU 2015/863) compliant materials

Maintenance Protocol

• Annual Inspection:

• Surface contamination check

• Resistance verification at 1kV DC

• Biennial Testing:

• Partial discharge re-certification

• Dielectric strength verification at 330kV AC

• Cleaning Procedure: Dry compressed air (max 3 bar) or electrostatic wipes

Safety Integration

1. Install visible discharge indicators on both terminals

2. Implement interlocked grounding switches

3. Maintain minimum 1m access clearance around unit

4. Use HV-rated safety barriers during operation

5. Perform daily insulation resistance check (>5GΩ)