Inductors & Filters
Inductors & Filters
Inductors and Filters are passive components that enhance power quality, stability, and protection in electrical systems. Inductors control current flow by smoothing ripples, limiting inrush, and reducing voltage fluctuations, while Filters combine inductors and capacitors to suppress harmonics, EMI/RFI, and electrical noise. They are widely applied in VFDs, UPS systems, renewable energy converters, motor drives, and power distribution networks. By mitigating disturbances and ensuring cleaner power, they help extend equipment life, improve efficiency, and maintain compliance with international power quality standards. Robust in design and adaptable to diverse industrial environments, Inductors and Filters play a vital role in modern energy and automation systems.
Inductors & Filters – Technical Specification
| Category | Specification |
|---|---|
| General Description | Passive components for energy storage, harmonic mitigation, EMI suppression, and equipment protection. Inductors store energy in a magnetic field; Filters combine inductors, capacitors (and resistors) to suppress harmonics, noise, and unwanted signals. |
| Standards & Compliance | IEC 60076, IEC 61558, IEEE C57.16, IEC 61000-2-2 / 61000-3-2, UL / CE certifications |
| System Voltage | 230 V / 400 V / 415 V / 480 V / 690 V (custom up to 11 kV) |
| Frequency | 50 Hz / 60 Hz (High-frequency inductors: kHz–MHz range) |
| Current Ratings | 1 A – 5000 A (application dependent) |
| Impedance / Inductance | Customized as per harmonic filtering or current limiting requirements |
| Insulation Class | Class F (155°C) or Class H (180°C) |
| Dielectric Strength | 3.0 kV AC for 1 minute |
| Efficiency | ≥ 98% |
| Core Material | CRGO silicon steel laminations, ferrite, or nanocrystalline (for high-frequency) |
| Windings | Copper (standard) / Aluminum (optional), varnish impregnated, VPI available |
| Cooling | Natural Air (AN), Forced Air (AF) optional |
| Mounting | Panel or floor-mounted, compact, vibration-resistant |
| Enclosure Protection | IP00 (open type), optional IP23 / IP31 / IP54 / IP65 for harsh/outdoor use |
| Environmental Limits | Temperature: –25 °C to +50 °C (derating above 50 °C) Humidity: ≤ 95% RH (non-condensing) Altitude: ≤ 1000 m (derating required above) |
| Types of Inductors | Line Reactors, DC Chokes, Common Mode Chokes, High-Frequency Inductors |
| Types of Filters | Harmonic Filters, EMI/RFI Filters, dv/dt Filters, Sine Wave Filters, Active Filters |
| Applications | – Harmonic mitigation & power factor correction – VFD, UPS & inverter protection – EMI/RFI suppression – Motor surge & insulation protection – Renewable energy integration – Current smoothing in DC circuits |
| Typical Example (Inductor) | Voltage: 415 V AC, 50 Hz Current: 100 A Inductance: 1.5 mH Insulation: Class F Protection: IP23 |
| Typical Example (Filter) | Voltage: 480 V AC, 60 Hz Current: 150 A Type: dv/dt filter Attenuation: Up to 5 kHz Cooling: Natural Air |