LQLVF 100kVA/2×250A Power Noise Filter: Wide Frequency EMI Suppression with ONAN Cooling

Broad-Spectrum Noise Attenuation

Engineered for critical EMI suppression across extended frequency ranges:

• 20KHz-100KHz range: >40dB attenuation

• 100KHz-1000KHz range: >60dB attenuation

• Wide operational frequency: 50-120Hz

• Verified per IEC 61000-4-7 harmonic measurement standards

Technical Specifications

Advanced ONAN Cooling Technology

Optimized thermal management for extended frequency operation:

• Mineral oil insulation with natural convection cooling

• Temperature rise limit: 60°C at full load

• Designed for ambient temperatures up to 45°C

• Expansion tank with nitrogen cushion

• Radiator fins optimized for variable frequency cooling

Wide Frequency Operation

Specialized design for variable frequency applications:

• 50-120Hz operational range (±2% stability)

• Frequency-independent attenuation performance

• Automatic impedance matching circuitry

• Core saturation protection at frequency extremes

• Harmonic resonance damping technology

Industrial Applications

Ideal for variable frequency power systems:

• Variable speed drive (VSD) power conditioning

• Frequency converter output filtering

• Test bench power supplies

• Specialized motor control systems

• Research and development facilities

• Power electronics laboratories

Dual-Circuit Design Features

Enhanced flexibility for complex systems:

• Independent primary and secondary circuits

• Differential current monitoring

• Asymmetric loading capability (±10%)

• Individual circuit protection devices

• Parallel operation capability

Installation & Maintenance Protocol

Ensure optimal performance with these guidelines:

1. Maintain minimum 400mm clearance for natural convection

2. Verify oil dielectric strength ≥40kV before commissioning

3. Perform frequency sweep tests annually (50-120Hz)

4. Check bushing connections quarterly (60 N·m torque)

5. Monitor oil temperature during frequency transitions

6. Test attenuation performance at 60Hz, 90Hz and 120Hz

Safety & Protection Systems

Engineered for reliable variable frequency operation:

• Pressure relief device with alarm contacts

• Dual RTD temperature sensors (oil and core)

• Overfluxing protection for frequency extremes

• Moisture-controlled breather system

• Short-circuit withstand: 20kA for 500ms

Compliance & Standards

Meets international requirements including:

• IEC 60076 power reactor standards

• IEEE C57.12.00 liquid-immersed equipment

• EN 50588-1 medium-power transformers

• IEC 61000-3-12 harmonic emissions

• ANSI/IEEE C57.96 reactor practice guide

For custom frequency range configurations or technical support, contact our engineering team. Performance validated per IEEE 1137-2018 test standards.