132kV Large Power Transformer – 40MVA Oil-Immersed Substation Unit for Industrial & Utility Applications

40MVA 132kV Oil-Immersed Large Power Transformer Features

The 132kV 40MVA oil-immersed large power transformer is engineered for high-reliability performance in industrial and utility substations across North and South America. Designed to seamlessly integrate into high-voltage grids, this three-phase transformer supports critical power distribution for manufacturing plants, renewable energy farms, and regional utility networks.

Featuring a robust Delta-connected primary winding and configurable secondary voltages ranging from 33kV to 11kV, the transformer meets diverse voltage requirements common in American and Latin American power systems. Its core uses premium cold-rolled grain-oriented silicon steel, optimizing magnetic flux with minimal core losses. High-quality copper conductors with precision winding techniques reduce load losses and enhance thermal stability, ensuring long-term operational efficiency.

The unit is enclosed in a fully sealed, welded steel tank with high-efficiency radiator fins, filled with advanced biodegradable ester-based insulating oil, offering superior dielectric properties and eco-friendly performance. Standard accessories include porcelain bushings rated for 132kV, pressure relief devices, gas-actuated protective relays, and temperature monitoring ports. Optional features such as on-load tap changers (OLTC) and digital remote monitoring enable precise voltage regulation and real-time condition tracking.

Extensive type and routine tests, including lightning impulse and temperature rise assessments, guarantee compliance with IEC 60076, ANSI C57.12, IEEE, CSA, UL, and GOST standards. These rigorous standards ensure safe operation, durability, and minimal maintenance requirements.

A noteworthy case involved a utility company in Brazil seeking a reliable transformer solution for a rapidly expanding industrial park. Energy Transformer provided a customized 132kV 40MVA unit featuring advanced cooling and remote monitoring. The installation improved grid stability and enabled seamless integration of solar power, earning positive feedback for performance and service responsiveness.

Energy Transformer manufactures these units with OEM options and private labeling, supplying factories, contractors, and utilities across the USA, Canada, Mexico, Brazil, Argentina, Peru, Chile, and beyond. Our factory-direct supply, competitive pricing, and tailored configurations support large-scale energy projects and sustainable infrastructure development throughout the Americas.

Learn More：110 kV 10-300 MVA Three Phase Oil Immersed High Voltage Power Transformer

40MVA 132kV Oil-Immersed Large Power Transformer Technical Specs

No.	Item	Specification	Remark
1	Power Rating	40 MVA (Range: 10–150 MVA)	Suited for medium to large power networks
2	Primary Voltage	132 kV (Delta connection standard)	Designed for high-voltage grid input
3	Secondary Voltage	33 kV / 22 kV / 11 kV / 10.5 kV	Voltage levels customizable to project needs
4	Phase	Three-phase, 50Hz or 60Hz	Universal frequency compatibility
5	Cooling Type	ONAN / ONAF	Efficient passive or forced air cooling
6	Core Material	Grain-oriented steel (CRGO)	Reduces magnetizing current and core loss
7	Insulation Medium	Biodegradable ester or mineral oil	High dielectric strength, environmentally safer options
8	Temperature Rise	≤ 65°C (ONAN), ≤ 80°C (ONAF)	Maintains thermal limits under load
9	Enclosure	Outdoor-rated steel tank	Rugged design for harsh climates
10	Standards Compliance	ANSI, IEEE, IEC, CSA	Built to global utility standards
11	Certifications	UL, CSA, CE, GOST, SGS	Internationally recognized quality assurance
12	Connection Options	Delta-Wye, Delta-Delta, Wye-Wye, Wye-Delta	Adaptable for multiple network configurations
13	Applications	Utility substations, renewables, industry	For grid integration and heavy-load distribution
14	Protection Features	Gas relay, thermal sensors, overload relay	Ensures safe and reliable operation
15	Dimensions & Weight	Tailored to specification	Optimized layout for transport and footprint
16	Efficiency	≥ 99% at rated load	Reduced operational energy loss
17	Operating Temperature	-30°C to +55°C	Performs reliably across climate zones
18	Total Loss (at Load)	≤ 1.3%	Engineered for grid efficiency
19	No-Load Loss	≤ 0.35%	Minimal energy waste in idle state
20	Load Loss	≤ 0.95%	Low losses at full load conditions
21	Impedance Voltage	6.0% ±10%	Stable voltage drop and regulation
22	Short-Circuit Endurance	Up to 50 kA	Withstands grid fault conditions
23	Insulation Class	Class A (105°C max)	Durable under thermal stress
24	Winding Material	High-conductivity copper (optional aluminum)	Offers high thermal and electrical performance
25	Tap Changer Type	Off-load or OLTC	Voltage regulation under load
26	Bushing Type	Porcelain or composite	UV-resistant and weatherproof
27	Oil Volume	Approx. 800–1,100 liters	Varies by size and design
28	Lifespan	30+ years	Long-term reliability in the field
29	Noise Level	55–62 dB(A)	Suitable for residential or city-side installs
30	Warranty	Standard 24–36 months	Extended options available
31	Delivery Time	6–10 weeks (standard)	Depending on order volume and specs
32	Lead Time for Custom	90–120 days	For bespoke designs and bulk orders
33	Surge Protection	Optional built-in arresters	Prevents voltage spike damage
34	Buchholz Relay	Included as standard	Detects internal arc faults early
35	Pressure Relief Valve	Equipped for oil tank safety	Protects against abnormal pressure buildup
36	Online Monitoring	IoT-ready (optional)	Enables remote diagnostics and alerts
37	Environmental Compliance	RoHS, REACH	Meets environmental and chemical safety directives
38	Cooling Oil Options	Mineral or natural ester oil	Based on environmental or project need
39	Shipping & Packaging	Export-grade, reinforced	Secures transformer during international transport
40	Market Coverage	USA, Canada, Mexico, Brazil, Argentina, Peru, Panama, Spain	Preferred choice in American and Iberian markets

✅ Voltage Configurations for 132kV Large Power Transformer

Energy Transformer provides custom-tailored 132kV Large Power Transformers to meet diverse utility and industrial needs. Common secondary voltage combinations include:

• 132/33 kV transformer – Widely used in regional distribution grids across North and South America

• 132/11 kV transformer – Standard for urban substations and industrial loads

• 132/25 kV transformer – Ideal for rail, heavy equipment, and petrochemical zones

• 132/6.6 kV transformer – Used in mining operations and offshore facilities

• Dual-ratio secondary coils available for flexibility and redundancy
  All configurations are compatible with Dyn11, YNd11, or YNyn0 vector groups for grid stability and grounding schemes.

✅ 132kV Transformer Bushing Options & HV Terminations

Every 132kV Large Power Transformer is equipped with high-durability bushings built for safety and performance:

• 132kV porcelain bushings – Durable under heavy pollution and mechanical stress

• 132kV polymer composite bushings – Hydrophobic, lightweight, ideal for coastal or humid environments

• Current ratings from 600A to 1250A, with optional corona rings

• HV terminations available in top-mount, side-mount, or sealed cable box configurations
  All bushings are tested to IEC/ANSI standards for partial discharge, lightning impulse, and power frequency withstand.

Read More:220kV–400kV 200MVA Transmission Power Transformer | 3-Phase Oil-Immersed

✅ ONAN / ONAF Cooling System for 132kV Power Transformers

Our oil-immersed 132kV Large Power Transformers utilize advanced cooling mechanisms for continuous high-load operation:

• ONAN cooling – Natural convection with corrugated tanks or radiators

• ONAF cooling – Forced air with fan-assisted radiator banks

• Temperature rise limits: ≤65°C (ONAN), ≤80°C (ONAF)

• Optional smart fan controllers with integrated oil & winding temperature sensors
  This ensures reliable performance in ambient temperatures up to 50°C.

✅ Voltage Regulation: OLTC & Off-Circuit Tap Changers

Energy Transformer offers multiple tap changer solutions for 132kV Large Power Transformers:

• On-Load Tap Changer (OLTC) – ±10% voltage range in 16 steps, remote or automatic control

• Off-circuit tap links – Cost-effective for fixed-voltage networks

• OLTC housed in motorized control cabinets with position display

• Integrated protection: Buchholz relay, temperature sensors, surge arresters, interlock systems
  This enables smooth voltage adjustment under varying load conditions.

✅ Smart Monitoring for 132kV Transformer Digitalization

Modern 132kV power transformers are IoT-ready and SCADA-compatible:

• Real-time remote monitoring of oil temperature, load current, OLTC position

• Moisture and gas-in-oil analysis for early fault detection

• Communication options: Modbus, DNP3, IEC 61850, or cloud API

• Alarm notifications via SMS/email for fault or threshold exceedance
  Perfect for utilities adopting smart grid and predictive maintenance systems.

Get More:High Voltage 220kV/230kV Step-Down Power Transformer for Substations | 50–500 MVA Oil-Immersed

✅ Transformer Core & Coil Structure

Each 132kV Large Power Transformer is manufactured with high-efficiency materials and processes:

• Step-lap cold-rolled grain-oriented (CRGO) steel core for low no-load losses

• Copper or aluminum windings with foil or layered disc construction

• Vacuum drying and hot oil impregnation ensure dielectric reliability

• Insulation systems rated for Class A/B temperature withstand
  Winding structure is optimized for low noise, high fault tolerance, and easy maintenance.

✅ Testing & International Certifications

Before shipment, every 132kV transformer undergoes extensive validation:

• Routine tests: voltage ratio, resistance, insulation, load/no-load loss

• Type tests: lightning impulse, temperature rise, short-circuit withstand

• Optional special tests: PD, sound level, harmonics

• Certifications: IEC 60076, ANSI C57.12, CSA, UL, CE, GOST
  FAT (Factory Acceptance Test) with remote video or third-party witness available.

✅ 132kV Transformer Price Overview

The cost of a 132kV 40MVA Large Power Transformer varies based on:n- Rated capacity: 25–80 MVAn- OLTC vs. off-circuit tap changern- Copper vs. aluminum windingsn- Cooling design and optional monitoring featuresnnTypical EXW price range: $290,000–$460,000 USD. Contact us for a fast quote, spec sheet, and delivery schedule tailored to your project.

✅ Protection Features for Grid Safety

Our utility-grade 132kV step-down transformers come standard with:n- Buchholz relay and gas relay for internal fault monitoringn- Pressure relief valves with signal contactsn- Oil level and winding temperature indicatorsn- Surge arresters for high-voltage protectionn- Optional arc detection relays and digital protection panels

Read More:Heavy 66kV/69kV High Voltage Transformer 10MVA to 80MVA Grid-Connected Utility Transformer

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Why Choose 132kV Large Power Transformer – 40MVA Oil-Immersed Substation Unit for Industrial & Utility Applications?

Energy Transformer's 132kV Large Electrical Power Transformer is designed to provide efficient and reliable voltage transformation for industrial substations, utility grids, and renewable energy integration projects. With a robust 40MVA rating, it supports critical power distribution with exceptional stability and performance.

✅ Engineered for High-Voltage Grid Performance

The 132kV Large Power Transformer effectively steps down transmission voltage to usable distribution levels, ensuring smooth energy flow across urban, industrial, and renewable networks.

✅ Durable Construction and Advanced Cooling

Built with rugged materials and optimized oil-immersed cooling systems (ONAN/ONAF), this transformer guarantees long service life and consistent operation even under demanding environmental conditions.

✅ Compliant with International Safety Standards

Manufactured in line with IEC 60076, ANSI C57.12, IEEE, UL, CSA, and CE certifications, the 132kV Large Power Transformer meets stringent safety and quality requirements for North and South American markets.

✅ Versatile Voltage and Configuration Options

Available with customizable voltage ratios, vector groups (YNd11, Dyn11, YNyn0), and on-load tap changers (OLTC), enabling precise voltage regulation tailored to specific grid demands.

✅ Efficient Production and Reliable Delivery

Standard lead times range from 60 to 90 days. Our transformers are exported worldwide, including to the USA, Canada, Mexico, Brazil, Argentina, and Chile, with comprehensive technical support and factory-direct pricing.

📩 Contact Energy Transformer today for detailed specifications, pricing, and project consultation on your 132kV Large Power Transformer needs. Depend on us for quality, performance, and on-time delivery.