LQLVF 400kVA/3kV Low Voltage Filter: Passive LC Network for High-Efficiency EMI Suppression

Advanced Passive Filter Technology

Utilizing a precision-engineered LC network for superior EMI suppression:

• Series inductance: Low-loss ferromagnetic core design

• Parallel capacitors: Self-healing metallized film technology

• Low-pass filter topology with sharp roll-off characteristics

• Low insertion loss (<0.5dB at 50Hz)

• High attenuation efficiency across operational band

Technical Specifications

Optimized Attenuation Characteristics

Engineered frequency response for critical noise suppression:

• 40-100kHz band: >30dB attenuation (harmonic suppression)

• 100kHz-1MHz band: >50dB attenuation (RFI/EMI control)

• 80dB/decade roll-off rate

• Resonance damping circuitry

• Frequency-stable performance (±2% across load range)

Low-Loss Design Advantages

Maximizing system efficiency while providing EMI protection:

• Core losses <0.8% at full load

• Copper losses <0.5% at rated current

• Total system efficiency >98.5%

• Advanced cooling fins for natural convection

• Temperature rise limited to 55°C at full load

Industrial Applications

Ideal for 3kV systems requiring efficient EMI suppression:

• Industrial motor drives

• Medium-voltage switchgear

• Renewable energy inverters

• Railway traction systems

• Test laboratory power supplies

• Mining power distribution

Passive Network Design Features

Robust and maintenance-free operation:

• No active components - higher reliability

• Fail-safe operation

• No external power supply required

• Wide temperature operation (-25°C to +65°C)

• 20-year design life expectancy

Installation & Maintenance Protocol

Simplified deployment for industrial environments:

1. Maintain minimum 200mm clearance for airflow

2. Use crimped connectors rated for 150A minimum

3. Verify torque values on terminals (45 N·m)

4. Perform annual visual inspection of components

5. Test insulation resistance every 3 years (≥500MΩ at 5kV DC)

6. Monitor attenuation performance every 5 years

Safety & Protection Systems

Engineered for reliable operation:

• Internal discharge resistors for capacitors

• Overvoltage protection (5kV/1min withstand)

• Thermal fusing for capacitor banks

• Corona-resistant encapsulation

• IP54-rated enclosure

Compliance & Standards

Meets international requirements including:

• IEC 61000-3-12 harmonic emissions

• IEEE 519-2022 harmonic control

• EN 60204-1 safety of machinery

• IEC 60076-6 reactor standards

• UL 508 industrial control equipment

For passive filter design guides or technical specifications, contact our engineering team. Performance validated per IEC 61000-4-7 measurement standards.