LQLVF 200kVA/500A Power Noise Filter: High-Current EMI Suppression with ONAN Cooling

Extended Range Noise Attenuation

Engineered for comprehensive EMI suppression in industrial power systems:

• 10KHz-100KHz range: >40dB attenuation

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

• Enhanced low-frequency performance starting at 10kHz

• Verified per IEC 61000-4-7 measurement standards

Technical Specifications

Advanced ONAN Cooling Technology

Optimized thermal management for high-current applications:

• Mineral oil insulation with natural convection cooling

• Temperature rise limit: 65°C at full load

• Designed for ambient temperatures up to 45°C

• Expansion tank with nitrogen cushion

• Optimized radiator fins for efficient heat dissipation

High-Current Capability

Robust design for industrial power applications:

• 500A continuous current rating

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

• Copper windings with 150% overload capacity

• Short-circuit withstand: 25kA for 100ms

• Dynamic response time <5ms for load variations

Enhanced Low-Frequency Performance

Specialized design for challenging EMI environments:

• Effective attenuation starting at 10kHz

• Harmonic resonance damping technology

• Frequency-stable reactors (±1% across load range)

• Core saturation protection during transients

• Multi-stage filtering topology

Industrial Applications

Ideal for 0.4kV systems in:

• Industrial motor control centers

• Large-scale HVAC power systems

• Plastic injection molding machinery

• Industrial furnace control systems

• Material handling conveyor systems

• Pump and compressor stations

Installation & Maintenance Protocol

Ensure optimal performance with these guidelines:

1. Maintain minimum 500mm clearance for natural convection

2. Verify oil dielectric strength ≥40kV before commissioning

3. Use compression lugs rated for 600A connections

4. Torque power terminals to 60 N·m ±5%

5. Perform annual power factor/dissipation factor tests

6. Test insulation resistance annually (≥100MΩ at 2.5kV DC)

7. Monitor oil temperature during operation

Safety & Protection Systems

Engineered for reliable operation:

• Pressure relief device with alarm contacts

• Buchholz relay for gas detection

• Dual RTD temperature sensors (oil and winding)

• Surge protection (15kV/20μs withstand)

• Automatic discharge circuit for capacitors

• IP55-rated enclosure for harsh environments

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 C57.91 thermal loading guide

For high-current applications or technical datasheets, contact our engineering team. Performance validated per IEEE 1137-2018 test standards.