Find Verified Electric Transformers Suppliers, Manufacturers and Wholesalers

Reliable Transformers, Maximum Energy Efficiency

OC Power transformers are engineered to deliver uninterrupted energy flow for critical operations. Manufactured in the USA, each unit combines durability, precision, and efficiency to deliver superior voltage control, minimal energy loss, and consistent long-term performance.

From 10 kVA to 250 MVA, our transformers meet rigorous industry standards and are customizable for demanding applications.

Designed for utilities, data centers, and industrial facilities, these systems integrate advanced monitoring, safety features, and high-quality materials to deliver reliable power under all load conditions.

Trust OC Power for solutions that keep your operations running smoothly.

Our transformers are engineered for superior voltage control, minimal energy loss, and long-term reliability, ensuring optimal performance under all load conditions.

Power Range KV Voltage

Standards Specs
10 kVA to 250 MVA
Designed for up to 400 kV
50 / 60 Hz compatibility
Customizable per IEC 60076
Insulation Class (A, B, F & H)
Meets DOE, BIS, and IEC efficiency norms
Off-Circuit and On-Load Tap Changers (OLTC)
high impulse voltage performance
55C - 65C Temperature Rise
Meeting NEMA and IEC Low noise design
Cooling System (ONAN, ONAF, OFAF, OFWF, AN)
Pressure Relief Valves
Monitoring Gauges
Surge Protection
Sensors to detect insulation degradation
SCADA-compatible for remote monitoring

Structural Specifications
CRGO or Amorphous Alloy for minimal core losses
Step-lap construction
Electrolytic Copper or Aluminium for Winding
Pressure-tested and corrosion-protected
Porcelain / Polymer composite bushings
Cooling Radiators for heat dissipation
Epoxy Coatings for Harsh Climates
Protection Devices for System Safety
Dual heavy-duty terminals
Integrated automatic pressure relief valves
Enclosure Protection for outdoor installations
Digital temperature controllers
Corrosion-resistant coatings
High-Strength Fasteners
Lifting lugs and tie points
Expandable cooling fins

Custom Liquid filled Solar Inverter Step up Oil-Immersed Transformer for photovoltaic power plants includes hermetically sealed, amorphous alloy, conservator type and on-load tap changer type, which is usually pole mounted or installed in distribution station for daily lighting and factory power whose LV output up to 0.4kV. Our distribution transformer rating is up to 2500kVA, and primary voltage up to 35kV. The corrugated tanks as thermal expansion and contraction component enable the transformer oil completely isolated with the atmosphere. Oil distribution transformer with primary voltage range of 6,10,10.5,11,20,22,24,33, 35,38.5kV can be manufactured according to customer requirements.

Our position as a global manufacturing leader enables us to offer our customers a cutting-edge incombustible transformer, which utilizes the superior insulation characteristics and the self-extinguishing characteristics of epoxy resin. Fuji Electric customers rely on our cast resin transformers for a wide variety of applications and installations, with units in operation in various buildings, hospitals, public facilities, factories, and so on.

Cast Resin Transformers are dry-type electrical transformers designed to safely transfer electrical energy between voltage levels without using liquid insulation. Their windings are encapsulated in high-quality epoxy resin, providing excellent insulation, mechanical strength, moisture resistance, and fire performance. These transformers are suitable for indoor and selected outdoor installations where safety, reliability, and low maintenance are important. Cast resin transformers are widely used in commercial buildings, industrial plants, renewable energy projects, data centers, hospitals, airports, metro systems, and infrastructure facilities. Their low environmental risk, reduced maintenance requirements, compact construction, and resistance to moisture make them a reliable solution for medium-voltage electrical distribution and power conversion applications.

Key Specifications
Parameter Typical Specification
Product Type Cast Resin Dry-Type Transformer
Insulation Epoxy Resin
Phase Three-Phase / Single-Phase
Rated Capacity Typically 100 kVA to 10 MVA+
Primary Voltage Typically 3.3 - 33 kV
Secondary Voltage Typically 400 - 690 V
Frequency 50/60 Hz
Cooling AN / AF
Insulation Class Class F or higher, model dependent
Protection Temperature / Overload Protection
Installation Indoor / Outdoor, model dependent
Tapping Off-Circuit / On-Load, configuration dependent

Power& Distribution Transformer

Transformers

Product Details :

The Transformer used in the power supply unit is manufactured as per the UL norms.
The transformer will be potted/sealed in an enclosure using Epoxy (a mixture of Resin Hardener) which ensures high reliability and efficiency.

The enclosure is made up of Prime Stainless Steel material SS 304 grade (also carbon steel with powder coated enclosure can be provided on request )

Block Terminals will provide the easiest way for the customer to connect the secondary tappings. Photocell and timer connected as per the customer's needs.

A circuit breaker of 25A is provided for circuit protection.
Technical Details
Wattage - 300w
Frequency - 50/60 Hz
Pry. voltage - 120V /277V
Sec... voltages As per customer requirements
Insulation class F, H
Max. regulation 10%
Dielectric 2000v, primary to secondary for 1 second.
Dielectric 2000v, all windings to lamination for 1 second.

Toroidal Transformers, by meeting today's requirements for smaller, more efficient, quieter and safer products, are being accepted in an increasing range of electronic and electrical equipment With toroidal transformer smaller dimensions, lighter weight and low stray magnetic fields , you can build more compact, lower cost quality products without sacrificing performance.

Toroidal has a round shape with no air gaps, and with the primary and secondary windings uniformly distributed around the core, locks in\" the magnetic field and makes the toroidal transformer very quiet and efficient. Toroidal transformers are built around a ring-shaped core, which, depending on operating frequency, is made from a long strip of silicon steel or permalloy wound into a coil, powdered iron, or ferrite core.

We make wide range of Toroids based on customer specifications. We provide center potted, plate mounted, clamp mounted and many other types of Toroids on customer specifications.

Features
High precision winding with Jovil and Ruff machines.
High quality M4 27 CRGO core used
Class H+ 200 Deg C Dual coat Enameled copper wires used
UL approved
Center potting provided for better cooling and fixing
Tailor made according to customer specs
TYCO, PANDUIT and MOLEX connectors and crimps used for UL approved models
Custom made parts are designed and developed to meet specific requirements.

Standards
We follow Indian and UL standards.
We can provide UL 5085-1 and 5085-2
We can make our product compatible with all international standards

Applications
Used medical and audio equipment
Used in voltage stabilizers
Used in electronics circuits
Used in power supply units
Used in variacs
Used in high precision equipment

Product Details
The Transformer used in the power supply unit manufactured as per the UL norms.
Transformer will be potted/sealed in an enclosure using Epoxy (mixture of Resin & Hardener) which ensures high reliability and efficiency.
The enclosure is made up of Prime Stainless Steel material SS 304 grade (also carbon steel with powder coated enclosure can be provided on request )
Circuit breaker(25A x 3) provided for circuit protection.
Block Terminals will provide the easiest way for the customer to connect the secondary tappings.
Photocell and timer connected as per the customer needs
Technical Details
Wattage - 900w
Frequency - 50/60 Hz
Pry. voltage - 120V /277V
Sec... voltages As per customer requirements
Insulation class F, H
Max. regulation 7.5%
Dielectric 2000v, primary to secondary for 1 second.
Dielectric 2000v, all windings to lamination for 1 second.

Product Details
The Transformer used in the power supply unit manufactured as per the UL norms.
Transformer will be potted/sealed in an enclosure using Epoxy (mixture of Resin & Hardener) which ensures high reliability and efficiency.
The enclosure is made up of Prime Stainless Steel material SS 304 grade (also carbon steel with powder coated enclosure can be provided on request )
Circuit breaker(25A x2) provided for circuit protection.
Block Terminals will provide the easiest way for the customer to connect the secondary tappings.
Photocell and timer connected as per the customer needs
Technical Details
Wattage - 600w
Frequency - 50/60 Hz
Pry. voltage - 120V /277V
Sec... voltages 12, 13, 14, 15V
Insulation class F, H
Max. regulation 10%
Dielectric 2000v, primary to secondary for 1 second.
Dielectric 2000v, all windings to lamination for 1 second.

Description
Multi Tap Transformers allow greater flexibility in managing multiple wire runs by moving cables up and down the multi range. Our Resin Sealed Transformers ensure highest possible efficiency & reliability.

Features
Low Voltage Transformer ranging from 75 W - 1200W 120, 277 /12, 13, 14, 15V with Toroidal /EI.
50/60 Hz
Protection for each output circuit.
Photo cell Option
Rainproof Enclosure
Stainless Steel / Powder Coated.

Product Details
The Transformer used in the power supply unit manufactured as per the UL norms.
Transformer will be potted/sealed in an enclosure using Epoxy (mixture of Resin & Hardener) which ensures high reliability and efficiency.
The enclosure is made up of Prime Stainless Steel material SS 304 grade (also carbon steel with powder coated enclosure can be provided on request )
Circuit breaker(25A x 4) provided for circuit protection.
Block Terminals will provide the easiest way for the customer to connect the secondary tappings.
Photocell and timer connected as per the customer needs
Technical Details
Wattage - 1200w
Frequency - 50/60 Hz
Pry. voltage - 120V
Sec... voltages As per customer requirements
Insulation class F, H
Max. regulation 7.5%
Dielectric 2000v, primary to secondary for 1 second.
Dielectric2000v, all windings to lamination for 1 second.

Control transformers are mostly used for industrial applications where electromagnetic devices are used such as solenoids, contactors and relays. Also control transformers can be utilized in industrial electrical applications for regulating voltages through electrical and electronic circuits.

We make wide range of control transformers with E-I Lamination core and with various termination styles to suit for customer applications either single phase or Two phase or Three phase as per customer requirements . We provide termination with lead wires, terminal blocks, Din rails, solder points, screws, and terminal connectors. We can provide EI transformers up to 10kVA. We can provide with electrostatic shields, Thermal protector switches and circuit breakers.

Features
Insulation Class as per UL/IS (A,B,F,H)
C and L clamps are provided according to specifications.
High quality Terminal blocks are provided.
High quality XLPE leads wires used.
Low loss EI stampings used for high efficiency.
High quality hardware used.
Glass filled Nylon Bobbins used.
Flame retardant insulation tapes used inside.
High quality insulation used.
Fiber glass sleeves used for external wires.
Compact in space
Cost effective
Particularly well suited for resin cast
Less in weight
UL Approved

Standards
We follow IS11171.
Compatible to IEC61558-1
We can provide UL 5085-1 and UL 5085-2

Applications
Used in converters, inverters, instruments and power supplies.
Used in many types of machines and accessories.
Used in electronic sensing circuits.
Used in voltage stabilizers.
Used in power conditioning equipments.
Used in Rectified Modules

ALSTOM GBCDG61EG039SGCH
IDMT TWO O/C & ONE E/F RELAY WITH HIGH-S
Technical specification
Relay model no CDG61EG039SGCH
Relay type CDG 61
Case size 3D HOR.
Application 2 O/C & 1 E/F
Current setting - O/C 0.5 to 2 amps
Aux.conts.with flag. 3M S/R
Output contacts 2M S/R
C.T.Secondary 1 amps
Frequency 50 Hz
Burden 3 VA
Operating time 1.3 secs
Current setting - E/F 0.1 to 0.4 amps
High set - O/C Setting 4 to 16 amps
High set - E/F Setting 2 to 8 amps
High set & conts with flag CAG 13 / 2M S/R
Name plate RFG9125 901
Outline drawing MFJ 014
Wiring diagram MADZ 821.27-1

ALSTOM GBCDG61EG038SGCH
IDMT TWO O/C & ONE E/F RELAY WITH HIGH-S
Technical specification
Relay model no CDG61EG038SGCH
Relay type CDG 61
Case size 3D HOR.
Application 2 O/C & 1 E/F
Current setting - O/C 0.5 to 2 amps
Aux.conts.with flag. 3M S/R
Output contacts 2M S/R
C.T.Secondary 1 amps
Frequency 50 Hz
Burden 3 VA
Operating time 1.3 secs
Current setting - E/F 0.2 to 0.8 amps
High set - O/C Setting 4 to 16 amps
High set - E/F Setting 2 to 8 amps
High set & conts with flag CAG 13 / 2M S/R
Name plate RFG9125 902
Outline drawing MFJ 014
Wiring diagram MADZ 821.27-1

GBCDG61EG031SGCH
IDMT TWO O/C & ONE E/F RELAY WITH HIGH-S
Technical specification
Relay model no CDG61EG031SGCH
Relay type CDG 61
Case size 3D HOR.
Application 2 O/C & 1 E/F
Current setting - O/C 2.5 to 10 amps
Contacts 3M S/R
Output contacts 2M S/R
C.T.Secondary 5 amps
Frequency 50 Hz
Burden 3 VA
Operating time 1.3 secs
Current setting - E/F 1 to 4 amps
High set - O/C Setting 20 to 80 amps
High set - E/F Setting 10 to 40 amps
High set/High set contact CAG 13 / 2M S/R
Name plate RFG9125 904
Outline drawing MFJ 014
Wiring diagram MADZ 821.27-1

ALSTOM GBCDG61EG020SGCH
IDMT TWO O/C & ONE E/F RELAY WITH HIGH-S
Technical specification
Relay model no CDG61EG020SGCH
Relay type CDG 61
Case size 3D HOR.
Application 2 O/C & 1 E/F
Current setting - O/C 0.5 to 2 amps
Contacts 3M S/R
Output contacts 2M S/R
C.T.Secondary 1 amps
Frequency 50 Hz
Burden 3 VA
Operating time 3 secs
Current setting - E/F 0.1 to 0.4 amps
High set - O/C Setting 4 to 16 amps
High set - E/F Setting 1 to 4 amps
High set/High set contact CAG 13 / 2M S/R
Name plate RFG9126 901
Outline drawing MFJ 014
Wiring diagram MADZ 821.27-1

'ALSTOM' Protection Relay
MODEL NO:- P64392AE6M0060M;

GE TRANSFORMER PROTECTION RELAY
MODEL :- MUITILIN T60-N11-AKH-F8L-H6N-M8L-P6P U6P-W6;