Hermetically Sealed Oil Filled Transformer

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Hermetically Sealed Oil Filled Transformer

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MOQ : 1 Unit

Hermetically Sealed Oil Filled Transformer Specification

Capacity
Up to 2500 kVA

Operating Temperature
-25C to +50C

Low Voltage
0.4 kV - 0.433 kV

Cooling Type
ONAN (Oil Natural Air Natural)

Rated Voltage
11 kV / 22 kV / 33 kV

Dimension (L*W*H)
Variable (Depends on Rating and Design)

Voltage Booster Type
Tap Changer (Off Circuit or On-load as per Specification)

Load Loss
Compliant with IS 1180 and IEC Standards

Coil Material
Copper / Aluminium (as per requirement)

High Voltage
Up to 33 kV

Standard
IS 1180 Part 1, IEC 60076

Product Type
Hermetically Sealed Oil Filled Transformer

Material
Copper

Output
Product wise

Frequency (MHz)
50 Hertz (HZ)

Efficiency
99.9%

Phase
Three Phase

Usage
Power Distribution and Transmission

Coil Structure
Layer Wound / Cylindrical

Coil Number
Multiple (Based on capacity)

Power Scope
Up to 2500 kVA

Weight
Approx. 1500 - 3500 kg (Varies with rating)

Service Life Expectancy
25 Years Under Standard Operating Conditions

Tank Construction
Hermetically sealed corrugated steel tank, prevents moisture ingress

Insulation Class
Class A/F (as per design)

Paint Finish
Epoxy Primer with Polyurethane Top Coat (anti-corrosive)

Noise Level
< 60 dB at 1 meter

Impulse Withstand Voltage
Up to 170 kVp (as per rating)

Altitude Suitability
Up to 1000m above sea level (standard atmospheric conditions)

Accessories
HV & LV Bushings, Earthing Terminals, Lifting Lugs, Oil Drain Valve

Type Test & Routine Test
Compliant with IS/IEC requirements, Factory Test Certificates Provided

Protection
Pressure Relief Device, Buchholz Relay (optional), Oil Level Indicator

Oil Type
Mineral Oil as per IS 335

Hermetically Sealed Oil Filled Transformer Trade Information

Minimum Order Quantity
1 Unit

Supply Ability
100 Units Per Month

Delivery Time
2-3 Months

About Hermetically Sealed Oil Filled Transformer

We have premium quality Hermetically Sealed Oil Filled Transformer which is highly in demand for its various attributes such as noiseless performance, Eco-friendly structure, high stability of insulation and more. In addition to this, it ensures safety running, easy installation, shock resistance, seamless finishing, longer service life as well as cost effectiveness and smooth functioning. Furthermore, Hermetically Sealed Oil Filled Transformer used in industries for various purposes as it is reliable and easy to operate.

From the name of the Hermetically Sealed Transformer, it reflects that it is designed with the sealed tank which is equipped with the fins that permit the expansion at different range of temperature. This kind of electrical device has no conservator, and has zero connect with the atmosphere, which does not allow the passage of oxygen in it. The dielectric insulating fluid placed inside the transformer tank avoid the slugging and oxidation of the fluid. This Hermetically Sealed Oil Filled Transformer are easily accessible and maintenance free in nature which find its applications in exposed outdoor environments, like dust laden atmosphere, moisture, salt etc. This range of sealed transformer immersed in synthetic coolants are suitable for applications in indoors with ventilation. In industrial sectors, such as chemical plants or oil and gas terminals where poor accessibility makes regular maintenance impracticable. Such, Hermetically Sealed Oil Filled Transformer can be accommodated by certain devices that could measure heat related volume variations whereas gas cushion is used to compensate the volume variation due to heat.

Superior Moisture Protection

Hermetically sealed corrugated steel tanks ensure complete prevention of moisture ingress. This construction enhances transformer longevity by protecting the insulation and core from humidity-related degradation, making it ideal for diverse environmental conditions.

Reliable Performance and Testing

Every transformer undergoes rigorous type and routine testing as per IS and IEC standards. Factory test certificates are provided, assuring clients of consistent quality and performance. The transformers are engineered to withstand impulse voltages up to 170 kVp, guaranteeing operational safety.

Optimized for Efficiency and Safety

Achieve 99.9% efficiency with mineral oil cooling (ONAN type), minimal load loss, and a noise level below 60 dB. Safety mechanisms such as a pressure relief device and optional Buchholz relay enable safe, uninterrupted operation, while epoxy and polyurethane coatings provide superior corrosion resistance.

FAQ's of Hermetically Sealed Oil Filled Transformer:

Q: How does the hermetically sealed design benefit the transformer's performance?

A: The hermetically sealed corrugated steel tank eliminates exposure to external moisture, thereby maintaining optimal insulation quality and protecting internal components from corrosion and oxidation. This design substantially extends the transformer's service life and reliability.

Q: What is the process for testing and certification of these transformers?

A: All transformers undergo type and routine tests in compliance with IS 1180 Part 1 and IEC 60076 standards. Factory test certificates are issued for each unit, ensuring adherence to quality and performance benchmarks before delivery.

Q: When should a pressure relief device or Buchholz relay be used?

A: A pressure relief device is standard and protects against rapid pressure build-up within the transformer. The Buchholz relay is optional and recommended in sites where high sensitivity to internal faults or gas accumulation is desirable for enhanced safety.

Q: Where can these transformers be installed?

A: They are suitable for power distribution and transmission in urban, industrial, and rural settings. With altitude suitability up to 1000 meters and a robust anti-corrosive finish, they perform reliably in diverse climatic and atmospheric conditions.

Q: What insulation and cooling technologies are utilized in these transformers?

A: The transformer utilizes Class A or F insulation (depending on design) and is cooled using Oil Natural Air Natural (ONAN) methods with IS 335-grade mineral oil, ensuring efficient thermal management and safety under continuous operation.

Q: How efficient are these transformers and what is their expected service life?

A: With an efficiency rating of 99.9% and compliance with IS and IEC load loss standards, these transformers are engineered for optimal performance. When operated under standard conditions, their expected service life is up to 25 years.

Q: What are the main accessories provided with these transformers for ease of operation and maintenance?

A: Key accessories include HV and LV bushings, earthing terminals, lifting lugs, an oil drain valve, oil level indicator, and provisions for tap changers and optional Buchholz relays, simplifying installation and ongoing maintenance.

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