LQLVF 200KVA/2*500A Power Noise Filter: High-Current EMI Suppression with ONAN Cooling

Premium Noise Attenuation Performance

Engineered for critical EMI suppression in high-current 0.4kV systems:

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

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

• Ultra-low background partial discharge: <3pC

• Filter reactor quality factor: >70

• Verified per IEC 60270 partial discharge standards

Technical Specifications

Advanced ONAN Cooling Technology

Optimized thermal management for high-current intermittent operation:

• Mineral oil insulation with natural convection cooling

• Designed for 65°C average oil temperature rise

• Temperature stabilization time: <8 minutes after startup

• Sealed tank with nitrogen blanket protection

• Optimized radiator fins for rapid heat dissipation

Intermittent Duty Operation

Engineered for demanding operational cycles:

• 15-minute full-power operation cycles

• 8 cycles per day maximum

• Automatic cooldown monitoring system

• Thermal memory protection for sequential cycles

• Duty cycle counter with maintenance alerts

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

• Dynamic response time <5ms for load variations

• Short-circuit withstand: 25kA for 100ms

Industrial Applications

Ideal for intermittent high-power processes:

• Industrial resistance welding equipment

• Large induction heating systems

• High-power test facility power conditioning

• Pulse power systems

• Foundry and smelting operations

• High-current laboratory experiments

Installation & Maintenance Protocol

Ensure optimal performance with these guidelines:

1. Maintain minimum 500mm clearance for natural convection

2. Verify oil level monthly (visible in sight glass)

3. Perform dielectric oil testing annually (BDV ≥45kV)

4. Check bushing connections quarterly (85 N·m torque)

5. Monitor duty cycle counter for maintenance scheduling

6. Conduct infrared thermography during operational cycles

Safety & Protection Features

Engineered for reliable operation in demanding environments:

• Pressure relief diaphragm with alarm contacts

• Oil temperature monitoring with dual RTDs

• Automatic Buchholz relay for gas detection

• Moisture-absorbing breather with silica gel indicator

• Grounding terminals on all accessible metal parts

Compliance & Standards

Meets international requirements including:

• IEC 60076 power transformer standards

• IEEE C57.12.00 for liquid-immersed equipment

• EN 50588-1 medium-power transformers

• IEC 61000-3-12 harmonic emissions

• ANSI/IEEE C57.91 thermal loading guide

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