Technical Specifications

Design Features

• Dual-Cylinder Construction: Ø350mm inner/Ø400mm outer coaxial design for optimal heat dissipation

• Full-Load Endurance: Certified 60-minute operation at 300kV/0.1A without derating

• Low-Inductance Windings: <5μH inductance for impulse current stabilization

• Corona-Free Operation: Graded shielding prevents partial discharge above 150kV

Typical Applications

High-Voltage Test Systems

Essential component in 300kV+ test circuits for:

• Impulse voltage generators

• Cable fault detection systems

• Transformer withstand testing

Power System Protection

• Surge suppression in substation busbars

• Arc-flash mitigation circuits

• Switching overvoltage damping

Performance Advantages

1. Thermal Stability: ±1% resistance drift at full load (vs. industry-standard ±5%)

2. Compact Design: 40% weight reduction vs. conventional 300kV resistors

3. Safety Compliance: Meets IEC 61010-1 creepage distance requirements (≥5mm/kV)

4. Maintenance-Free: Sealed construction for operation in humidity up to 85% RH

Installation Guidelines

• Maintain ≥1.5m clearance to grounded surfaces

• Use CAT IV 1000V-rated connection cables

• Ambient temperature range: -25°C to +55°C

• Vertical mounting required for optimal cooling

Warning: Operation beyond 60-minute continuous duration requires forced-air cooling per IEC 60076-14.

Industry Certifications

Complies with international standards:

• IEC 60060-1: High-voltage test techniques

• IEEE 62: Guide for diagnostic field testing

• EN 50191: Erection and operation of electrical test equipment