Established in 1994, Chetan Electric Pvt. Ltd. stands as an ISO 9001 certified premier manufacturer and global exporter of high-precision power conditioning equipment based in Bangalore, India. Over three decades of continuous innovation have established our infrastructure as a benchmark for custom electromagnetic design, specializing in heavy-duty oil-cooled transformers, dry-type units, harmonic filter reactors, and custom OEM/ODM solutions engineered up to 5000 kVA and 33 kV operating voltages.
Our complete product portfolio undergoes rigorous type testing at the world-renowned Central Power Research Institute (CPRI), Bangalore. Every single production unit leaving our modern facility undergoes comprehensive routine testing in strict compliance with IS 2026, IS 1180, and IS 11171 / IEC 60076 standards, ensuring unmatched operational reliability, superior thermal withstand capabilities, and long-term dielectric performance under harsh industrial power line conditions.
Figure 1: State-of-the-art transformer and reactor winding, assembly, and testing facility at Bangalore, India.
Modern industrial power distribution networks face unprecedented electrical pollution due to the non-linear loads introduced by variable speed drives (VFDs), arc furnaces, uninterruptible power supplies (UPS), solar inverters, and heavy automotive manufacturing lines. These non-linear loads draw non-sinusoidal currents, injecting high-frequency harmonic distortions into the grid. Left unmitigated, harmonics cause capacitor bank overheating, premature insulation breakdown, nuisance breaker tripping, transformer core saturation, and severe electromagnetic interference (EMI).
As a leading OEM/ODM filter reactor supplier and exporter, Chetan Electric designs custom-tuned and detuned reactors engineered to absorb damaging harmonic frequencies, stabilize system power factors, and protect power factor correction (PFC) capacitor banks from catastrophic series resonance.
Engineered using high-permeability, low-loss grain-oriented silicon steel (CRGO) laminations. Designed for low voltage (LV) and medium voltage (MV) capacitor banks up to 1000 kVAR.
Manufactured without a magnetic iron core, eliminating magnetic saturation completely. Ideal for ultra-high voltage substations, fault current limiting, and high-frequency tuning filters.
Designed for high-capacity heavy industrial plants (steel mills, mining, chemistry) operating in severe environmental conditions (dust, chemical vapors, extreme ambient heat).
Custom OEM/ODM manufacturing requires precise matching of reactor impedance to system harmonic spectrum analysis. Below is the technical specification breakdown utilized by our engineering team when designing custom filter reactors for international OEMs and system integrators:
| Tuning Factor ($p\%$) | Resonance Freq. (50 Hz) | Resonance Freq. (60 Hz) | Dominant Suppressed Harmonics | Typical Industrial Application |
|---|---|---|---|---|
| 5.67 % | 210 Hz | 252 Hz | 5th, 7th, 11th, 13th | Heavy industrial networks with severe 5th harmonic content ($>8\%$ THD-I) |
| 7.00 % | 189 Hz | 227 Hz | 5th, 7th & higher | Standard industrial power factor correction; protects PFC capacitors from resonance |
| 14.00 % | 134 Hz | 161 Hz | 3rd, 5th, 7th | Commercial buildings & data centers with high single-phase non-linear loads (3rd harmonic) |
| 0.5% - 2.0% | Tuned Bandpass | Tuned Bandpass | Single Targeted Harmonic | Active & Passive Harmonic Filtering Banks for steel melting & arc welding facilities |
Beyond specialized filter reactors, Chetan Electric operates complete manufacturing lines for high-grade transformers, servicing public utilities, EPC contractors, and OEM equipment buyers worldwide.
Our oil-immersed distribution transformers are built for extreme durability in outdoor utility networks and industrial complexes. Available in capacities from 25 kVA to 5000 kVA with operating voltages up to 33 kV, these units feature step-lap CRGO core construction, electrolytic grade copper/aluminum windings, and ONAN/ONAF cooling configurations.
Designed specifically for indoor commercial structures, underground subways, hospitals, and offshore platforms where fire safety is paramount. Our dry-type transformers (up to 11 kV class) feature non-hygroscopic, flame-retardant Class F or Class H insulation systems.
We engineer custom electromagnetic solutions for severe duty cycles and complex voltage conversion needs across specialized industrial sectors:
Our Constant Voltage Transformers (CVT) utilize ferroresonant technology to provide instantaneous, noise-free voltage regulation for sensitive electronics, laboratory automation, and critical signal systems.
As global energy infrastructures transition toward smart grids, distributed renewable energy generation, and electrification of transport, procurement teams must evaluate OEM/ODM partners based on forward-looking engineering capabilities. The following four macroeconomic trends are shaping the strategic sourcing of filter reactors and transformers over the coming decade:
The rapid deployment of utility-scale solar PV installations and battery energy storage systems (BESS) requires specialized LCL filter reactors capable of handling high switching frequencies (2 kHz to 20 kHz) generated by SiC/GaN power inverters. OEM procurement is shifting toward ultra-low core loss reactors utilizing amorphous cores or fine-powder magnetic alloys to maximize round-trip energy efficiency.
Environmental regulations are pushing industrial buyers away from traditional mineral oils. Strategic procurement now prioritizes liquid-immersed reactors and transformers filled with natural ester (vegetable) or synthetic ester fluids. Ester fluids offer high fire points ($>300^\circ\text{C}$ Class K rating) and 100% biodegradability, reducing environmental liability for urban and agricultural substations.
Next-generation OEM filter reactors integrate fiber-optic thermal sensors, vibration monitors, and magnetic field probes directly into the winding structure. Real-time data telemetry enables predictive maintenance algorithms to detect winding displacement, harmonic overload, or insulation degradation before catastrophic grid failure occurs.
Global efficiency mandates (such as EU Ecodesign Tier 2 and Indian BEE Star ratings) require industrial buyers to evaluate Total Cost of Ownership (TCO) rather than upfront capital expenditure. OEM filter reactors are increasingly specified with K-Factor ratings (K-13, K-20) to withstand additional eddy current losses ($P_{EC}$) and stray load losses ($P_{OS}$) caused by high-frequency harmonic currents.
Over the past 30+ years, Chetan Electric has earned the trust of over 600 leading industrial conglomerates, defense organizations, public infrastructure developers, and healthcare facilities. Our custom transformers and filter reactors are installed and operating reliably in high-stakes environments across India and international markets.
To engineer a precise custom filter reactor, our design team requires: (1) System nominal operating voltage and frequency (e.g., 415V 50Hz or 480V 60Hz); (2) Reactive power compensation output in kVAR; (3) Tuning factor percentage ($p\% = 5.67\%, 7\%, 14\%$) or target harmonic order (5th, 7th, 11th); (4) Capacitor bank capacitance values per step; (5) Cooling method (Dry VPI, Cast Resin, or Oil-Immersed); and (6) Enclosure IP rating (IP00 for cabinet mounting, IP23/IP54 for standalone indoor/outdoor installation).
Linearity defines the current threshold up to which the reactor maintains its rated inductance without magnetic core saturation. If a reactor saturates during harmonic voltage surges, its inductance drops dramatically, shifting the resonant frequency higher into active harmonic zones and causing severe overload or resonance destruction of PFC capacitors. Chetan Electric's iron-core filter reactors guarantee a linearity factor of $I_{lin} \ge 1.6 \times I_n$ up to $2.5 \times I_n$ under heavy transient overcurrents.
Standard prototype samples and customized low-voltage reactor batches are typically engineered, manufactured, and routine-tested within 2 to 4 weeks. Medium-voltage power distribution transformers (up to 5000 kVA / 33 kV) and specialized liquid-immersed reactors generally require 4 to 6 weeks, depending on core material availability, custom enclosure fabrication, and third-party witness testing (such as CPRI certification requirements).
Unprotected PFC capacitors present low impedance to high-frequency harmonic currents ($X_C = 1 / 2\pi f C$). Consequently, harmonic currents naturally flow into the capacitors, producing severe thermal stress and dielectric breakdown. By connecting a detuned filter reactor in series with the capacitor bank, the total branch impedance becomes inductive at harmonic frequencies ($X_{total} = 2\pi f L - 1 / 2\pi f C > 0$), effectively blocking harmful harmonic currents from entering the capacitor steps.
All products undergo 100% factory routine testing in accordance with IS 2026 / IS 1180 / IS 11171 / IEC 60076 standards. Routine tests include: Winding Resistance Measurement, Voltage Ratio & Vector Group Check, Impedance Voltage & Load Loss Measurement, No-Load Loss & Current Measurement, Separate Source AC Withstand Voltage Test, and Induced Overvoltage Withstand Test. Type testing (Short Circuit Withstand and Temperature Rise Tests) is validated at CPRI Bangalore.
Yes. We regularly manufacture custom transformers and reactors for global exporters and international EPC projects. We accommodate single-phase and three-phase voltage profiles across Latin America (6.3 kV to 110V, 13.8 kV to 240V/480V), North America (480V/277V 60Hz), Europe/Asia/Middle East (400V/415V/11kV/33kV 50Hz), and supply custom vector groups (Dyn11, Dyn5, Yyn0, Star/Delta) to match local grid connection codes.
Contact our senior engineering team today to review your electrical single-line diagrams (SLD), request custom inductance calculations, or obtain factory-direct wholesale quotations for worldwide export.