LQLVF 100kVA/2*316.7A Power Noise Filter (Model LNF-190): ONAN Cooled HV EMI Suppression

Premium HV Noise Attenuation Performance

Model LNF-190 delivers critical EMI suppression for 3kV industrial power systems:

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

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

• Filter reactor quality factor: >70

• Dual-frequency compatibility (50-60Hz)

• Verified per IEC 61000-4-7 measurement standards

Technical Specifications

Advanced ONAN Cooling Technology

Optimized thermal management for high-current HV applications:

• Mineral oil insulation with natural convection cooling

• Designed for 60°C average oil temperature rise

• Temperature stabilization time: <10 minutes after startup

• Sealed tank with nitrogen blanket protection

• Optimized radiator fins for heat dissipation

High-Voltage Design Features

Engineered for reliable 3kV operation:

• Enhanced creepage distance: ≥25mm/kV

• Corona-free design up to 3.6kV operational voltage

• Partial discharge inception voltage >4.5kV

• Class H insulation system (180°C rating)

• Bushing design per IEC 60137 standards

Switchgear Integration Design

Optimized for HV switchgear cabinet installations:

• Compact dimensions for retrofitting existing compartments

• Front-access terminals with safety shrouds

• Vibration-dampened mounting system

• HV cable entry points with silicone rubber grommets

• Thermal alignment with switchgear airflow patterns

Industrial Applications

Ideal for 3kV systems in:

• Industrial HV switchgear installations

• Power generation substations

• Mine power distribution centers

• Marine propulsion power systems

• Railway electrification systems

• Large industrial motor drive systems

Dual-Circuit High-Current Design

Robust performance for demanding applications:

• 633.4A total current capacity (2×316.7A)

• Low-loss design (efficiency >98% at full load)

• Copper windings with 150% overload capacity

• Dynamic response time <5ms for load variations

• Short-circuit withstand: 25kA for 100ms

Installation & Maintenance Protocol

Ensure optimal performance in HV applications:

1. Verify cabinet clearance ≥500mm for natural convection

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

3. Check oil dielectric strength ≥45kV before commissioning

4. Torque HV terminals to 90 N·m ±5%

5. Perform annual power factor/dissipation factor tests

6. Test insulation resistance annually (≥1000MΩ at 5kV DC)

7. Monitor oil temperature during operation

Safety & Protection Systems

Engineered for reliable HV operation:

• Pressure relief device with alarm contacts

• Buchholz relay for gas detection

• Dual RTD temperature sensors (oil and winding)

• Surge protection (20kV/20μs withstand)

• Automatic discharge circuit for capacitors

• 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 power reactor standards

• IEC 61000-3-12 harmonic emissions

• ANSI/IEEE C57.91 thermal loading guide

For Model LNF-190 technical documentation or custom HV solutions, contact our specialized engineering team. Performance validated per IEC 60270 partial discharge standards.