Engineered in compliance with IS 2026, IS 1180, and CPRI type-tested standards. Built to perform under extreme ambient temperatures, coastal humidity, and high electrical stress.
In modern industrial grid infrastructure, the demand for high-accuracy measurement, reliable relay protection, and seamless power conversion is paramount. As a premier OEM Instrument Transformer Factory and Exporter serving Mumbai and international markets, Chetan Electric Pvt. Ltd. bridges the gap between high-voltage utility grids and sensitive industrial control gear. Instrument transformers—encompassing Current Transformers (CTs) and Potential/Voltage Transformers (PTs/VTs)—are the silent sentinels of the electrical grid, isolating measuring instruments, meters, and protective relays from high-voltage circuits while stepping down primary currents and voltages to standardized, manageable secondary values (such as 1A, 5A, 110V, or 100V).
When custom-engineering transformers for Mumbai’s dense industrial corridors—ranging from coastal port facilities to high-density financial data hub zones—standard off-the-shelf units often fail due to unique environmental stress factors. Our OEM facility specializes in bespoke magnetic circuit design, utilizing high-permeability, cold-rolled grain-oriented (CRGO) silicon steel (Grade M4, Hi-B) to minimize hysteresis and eddy current losses. Whether configured for indoor switchgear panels, outdoor substations, or harsh marine environments, our units are engineered for uncompromising accuracy (Classes 0.2, 0.2S, 0.5 for metering, and 5P10, 5P20, PS class for differential protection).
Precision-laminated laser-scribed CRGO core assemblies drastically reduce no-load magnetizing currents, ensuring class-leading energy efficiency and zero saturation under overload conditions.
Vacuum Pressure Impregnation (VPI) and cast epoxy resin formulations offer Class H and Class F thermal resistance, impervious to salt-laden humid coastal air in Western Maharashtra.
Mechanically clamped winding structures withstand heavy electrodynamic forces during grid fault conditions, validated by full short-circuit tests at CPRI Bangalore.
Our OEM capabilities extend beyond core current and potential measurement units to include complete step-down distribution, oil-immersed ONAN/ONAF units, dry-type resin transformers, and special furnace/rectifier transformers up to 5000 KVA at 33kV ratings. Each unit manufactured for export or regional deployment to Mumbai undergoes rigorous dielectric testing, impulse voltage withstand verification, and thermal rise measurement to guarantee decades of uninterrupted service.
Mumbai, as India's commercial powerhouse, demands an exceptionally resilient power distribution and measurement matrix. The metropolis and its surrounding industrial belts present unique operational challenges: high ambient atmospheric humidity, industrial chemical airborne pollutants, saline air from the Arabian Sea, and severe space constraints in urban substations. As an established manufacturer and exporter supplying Mumbai's leading engineering turnkeys, Chetan Electric designs tailored solutions for distinct localized environments:
Deploying ultra-quiet, flame-retardant Cast Resin Dry Type Transformers and precision Metering CT/PT sets in hyperscale data center facilities across Airoli, Mahape, and Taloja to ensure 99.999% power uptime and clean signal measurement for sensitive IT loads.
Supplying heavy-duty hermetically sealed oil-immersed transformers and outdoor instrument transformers with C5-M marine-grade anti-corrosion paint finish to withstand aggressive salt mist exposure at Jawaharlal Nehru Port Trust and coastal container yards.
Providing specialized Rectifier and Industrial Furnace Transformers equipped with On-Load Tap Changers (OLTC) and Remote Tap Changer Cubicles (RTCC) to handle severe non-linear harmonic loads and voltage fluctuations typical in heavy chemical processing.
Custom-building low-footprint, high-BIL single-phase and three-phase instrument transformers designed for seamless retrofitting into compact ring main units (RMU) and indoor substations servicing South Mumbai and Western Suburbs.
Standard catalog transformers usually make assumptions regarding ambient thermal limits (typically 40°C base) and balanced linear loads. However, in Mumbai's congested industrial grid, total harmonic distortion (THD) often exceeds standard thresholds, causing premature insulation breakdown in off-the-shelf instrument transformers. Chetan Electric’s OEM engineering team custom-calculates K-factor derating, adjusts copper cross-sectional density, and incorporates thermal-gradient barrier insulation to prevent localized hotspotting—extending operational transformer lifespan by up to 40% under severe field conditions.
The electrical landscape across Maharashtra—driven by the Maharashtra State Electricity Distribution Company Limited (MSEDCL), Adani Electricity Mumbai Limited, and Tata Power—is undergoing a rapid technological modernization. Procuring entities and industrial EPC contractors in Mumbai are increasingly prioritizing specific technological vector shifts:
Established in 1994, Chetan Electric Pvt. Ltd. has evolved into a premier Indian manufacturer and global exporter of custom transformers. Operating from an ISO 9001:2015 certified plant in Bangalore, India, our technical footprint spans over three decades of uninterrupted electrical engineering innovation, supplying high-specification units up to 5000 KVA at 33kV class to more than 600 global enterprises.
All flagship designs undergo rigorous type-testing at the Central Power Research Institute (CPRI), validating short-circuit endurance, lightning impulse withstand strength, and thermal rise performance.
From dual-secondary current transformers to custom vector groups (Dyn11, Dyn1, YNd11) and specialized tap changer cubicles, we build precisely to client design specifications.
Serving defense, space research, heavy industry, and real estate giants with a track record of reliable field performance and rapid project execution.
All outdoor distribution and instrument units bound for coastal locations such as Mumbai, JNPT, or Navi Mumbai feature hermetically sealed corrugated tanks or heavy-gauge steel tanks treated with polyurethane C5-M anti-corrosion paint coatings. Internal active parts are vacuum pressure impregnated (VPI) with moisture-resistant resins to prevent insulation degradation caused by high ambient salt mist.
We manufacture Current Transformers (CTs) and Potential Transformers (PTs) meeting IS 2705 / IS 3156 and IEC 61869 standards. Accuracy classes range from Class 0.2 and 0.2S (for revenue metering) to Class 0.5, 1.0, and protective classes including 5P10, 5P20, and Class PS (for differential protection schemes in critical industrial feeders).
Yes. Our standard design prototypes have undergone full type-testing—including short-circuit withstand, lightning impulse, temperature rise, and noise level tests—at the Central Power Research Institute (CPRI), Bangalore. Copies of official CPRI certificates are provided alongside technical submittals for major municipal and industrial tenders.
Standard distribution transformers (up to 500 kVA) can be delivered within 2 to 3 weeks. Tailored OEM orders—such as ONAN 1500 kVA units, special furnace transformers, or custom multi-ratio instrument transformers—typically take 4 to 6 weeks, including factory acceptance testing (FAT) witnessed by your inspection agency.
Yes. We engineer Cast Resin Dry Type (CRT) and Vacuum Pressure Impregnated (VPI) dry transformers up to 11kV rating. These units carry F1 fire behavior and E2 environmental resistance ratings, fully compliant with National Building Code (NBC) safety mandates for installation inside commercial basements, hospital wings, and high-rise towers across Mumbai.
Absolutely. We specialize in custom OEM engineering for non-standard voltage ratios (e.g., 6.3kV to 110V single-phase, 13.8kV to 240/480V, 20kV to 0.4kV, or dual secondary outputs). Our engineering team reviews your single-line diagram (SLD) to ensure exact voltage tapping and vector group alignment.
Connect with our senior engineering team to discuss your project technical specifications, request single-line diagram (SLD) evaluation, or receive a quick competitive price quote.