LQLVF 250kVA/2*83.3A Power Noise Filter: High-Voltage EMI Suppression with Ultra-Low Partial Discharge

Premium HV Noise Attenuation

Engineered for critical EMI suppression in 3kV industrial power systems:

• 40KHz-100KHz range: >40dB attenuation

• 100KHz-1MHz range: >60dB attenuation

• Background partial discharge: <3pC (ultra-low level)

• Filter reactor quality factor: >70

• Dual-frequency compatibility (50-60Hz)

Technical Specifications

Ultra-Low Partial Discharge Design

Advanced engineering for sensitive electrical environments:

• Background PD level <3pC at rated voltage

• Triple-shielded reactor construction

• Corona-suppression encapsulation technology

• PD-monitoring compatible terminal points

• Validated per IEC 60270 measurement standards

High-Voltage Insulation System

Robust protection for 3kV applications:

• 5kV/1min dielectric strength (exceeds IEC 60664 requirements)

• Class F insulation system (155°C rating)

• Enhanced creepage distance: ≥25mm/kV

• Corona-free design up to 3.6kV operational voltage

• Partial discharge inception voltage >4.0kV

Switchgear Integration Design

Optimized for HV switchgear cabinet installations:

• Compact dimensions for retrofitting existing compartments

• Front-access terminals with safety shrouds

• Vibration-resistant mounting system

• Thermal management for enclosed spaces

• HV cable entry points with silicone rubber grommets

Industrial Applications

Ideal for 3kV systems in:

• Industrial HV switchgear installations

• Power generation substations

• Utility transmission systems

• Renewable energy converter stations

• High-voltage test laboratories

• Marine power distribution systems

Dual-Circuit Reliability

Enhanced system performance and redundancy:

• Independent circuits for critical applications

• Asymmetric load balancing capability (±15%)

• Individual circuit monitoring points

• Fault isolation protection per circuit

• Parallel operation capability

Installation & Maintenance Protocol

Ensure optimal performance in switchgear applications:

1. Verify cabinet dimensions ≥600×500×800mm (W×D×H)

2. Use silicone-insulated HV cable (8kV rating minimum)

3. Maintain minimum 150mm clearance to grounded surfaces

4. Torque HV terminals to 80 N·m ±3%

5. Perform semi-annual partial discharge scans

6. Test insulation resistance annually (≥500MΩ at 5kV DC)

7. Monitor attenuation performance every 24 months

Safety & Protection Systems

Engineered for reliable HV operation:

• Arc-resistant containment barriers

• Over-temperature protection with lockout

• Surge protection (20kV/20μs withstand)

• Ground fault monitoring with isolated relays

• Automatic discharge circuits

• IP55-rated enclosure for harsh environments

Compliance & Standards

Meets international HV requirements:

• IEC 62271-200 for AC metal-enclosed switchgear

• IEEE C57.12.00 liquid-immersed equipment

• EN 50522 earthing of power installations

• IEC 60076-6 power reactor standards

• IEC 61000-3-12 harmonic emissions

• ANSI/IEEE C57.12.90 test code

For HV switchgear integration guides or custom solutions, contact our specialized engineering team. Performance validated per IEC 60270 partial discharge standards.